글 읽기 - 테스트는 다 맞는데 제출에서는 틀렸습니다가 나옵니다

dbsdudtjr987 7년 전 2

테스트는 정말 다 맞는데

제출에서는 틀렸습니다가 나옵니다

지인과 계속 오류를 찾고있는데도 무엇이 잘못됬는지 찾을수가 없습니다.

알고리즘은 2차원 배열을 만든뒤에 0,0 좌표부터 시작하여 끝 좌표까지 가는데

가는도중 섬이 있다면 그 주변 8방향을 체크하여 스택에 push하고 빈 2차원배열에 check표시 해주고,

pop하여 또 8방향을 체크 그래서 pop이 안되면 count ++ 해주는 알고리즘입니다

부탁드립니다 하트 하트

#include<stdlib.h>
#include<stdio.h>
#define MAX_SIZE 100
typedef struct stacktype {
	int stack_x[MAX_SIZE];
	int stack_y[MAX_SIZE];
	int top;
}stacktype;
void init(stacktype *s1) {
	s1->top = -1;
}
void push(stacktype *s1, int x, int y) {
	if (s1->top + 1 > MAX_SIZE)return;
	(s1->stack_x)[++(s1->top)] = x;
	(s1->stack_y)[(s1->top)] = y;
}
int* pop(stacktype *s1) {
	int temp[2];
	if (s1->top == -1)return NULL;
	temp[0] = s1->stack_x[s1->top];
	temp[1] = s1->stack_y[(s1->top)--];
	return temp;
}
void check_around(stacktype *s1, int x, int y, int w, int h, int **arr, int **check_arr) {

	int x_plus[8] = { 0,1,1,1,0,-1,-1,-1 };
	int y_plus[8] = { -1,-1,0,1,1,1,0,-1 };

	for (int k = 0; k < 8; k++) {
		if (x + x_plus[k] >= w || y + y_plus[k] >= h || x + x_plus[k] < 0 || y + y_plus[k] < 0)continue;
		if (arr[y + y_plus[k]][x + x_plus[k]] == 1 && check_arr[y + y_plus[k]][x + x_plus[k]] != 1) {
			push(s1, x + x_plus[k], y + y_plus[k]);
			check_arr[y + y_plus[k]][x + x_plus[k]] = 1;
		}
	}
}
int count_island(int **arr, int **check_arr, int w, int h) {

	stacktype s1;
	init(&s1);

	int *temp, x, y, count = 0;

	for (int i = 0; i < h; i++) {
		for (int j = 0; j < w; j++) {
			if (arr[i][j] == 0 || check_arr[i][j] == 0 || check_arr[i][j] == 1)continue;
			check_arr[i][j] = 1;
			check_around(&s1, j, i, w, h, arr, check_arr);
			while (1) {
				temp = pop(&s1);
				if (temp != NULL) {
					x = temp[0];
					y = temp[1];
					check_around(&s1, x, y, w, h, arr, check_arr);
				}
				else {
					count++;
					break;
				}
			}
		}
	}
	return count;
}
int main() {
	int w, h, **arr, **check_arr, temp_h, temp_w, w_s = 0, h_s = 0, result;
	while (1) {
		scanf("%d %d", &w, &h);
		if (w == 0 && h == 0)break;
		arr = (int**)malloc(sizeof(int*) * h);
		check_arr = (int**)malloc(sizeof(int*) * h);
		for (int i = 0; i < h; i++) {
			*(arr + i) = (int *)malloc(sizeof(int) * w);
			*(check_arr + i) = (int *)malloc(sizeof(int) * w);
		}
		temp_h = h;
		temp_w = w;
		while (temp_h--) {
			while (temp_w--) {
				scanf("%d", &arr[w_s][h_s++]);
			}
			w_s++;
			h_s = 0;
			temp_w = w;
		}
		result = count_island(arr, check_arr, w, h);
		printf("%d\n", result);

		free(check_arr);
		free(arr);
		w_s = 0;
		h_s = 0;
	}
}

50 50
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 1 1 1
1 1 1 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 1 1 1
1 1 1 0 0 1 1 1 1 1 0 0 1 1 1 1 1 1 1 0 0 0 1 1 1 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 1 1 1 1 1
1 1 1 0 0 1 1 1 1 1 0 0 1 1 1 1 1 1 1 0 0 1 1 1 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 1 1 1 1 1
1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 1 1 0 0 0 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 1 1 1 1 1
1 1 1 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 0 0 1 0 0 0 1 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 1 1 1 1 1
1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 1 1 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 1 1 1 1 1
1 1 1 0 0 1 1 1 1 1 0 0 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 1 1 1 1 1 1
1 1 1 0 0 1 1 1 1 1 0 0 1 1 1 1 1 1 1 0 0 0 1 1 1 1 0 0 0 1 1 1 1 1 1 0 0 1 1 1 1 0 0 1 1 1 1 1 1 1
1 1 1 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 1 1 1 1 1 1 1 1
1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
0 1 1 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 0 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 0 1 1 1 1 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 0 1 1 1 1 1 1 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 1 0 0 0 1 1 1 1 1 1
1 1 1 1 1 1 1 1 0 0 1 1 1 1 1 1 1 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 0 0 1 1 1 1 1 1 1 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 0 0 1 1 1 1 1 1 1 1 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 0 0 0 1 1 1 1 1 1 1 1 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 0 0 1 1 1 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 0 0 1 1 1 1 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0
1 1 1 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 1 1
1 1 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 1 1 1 1
1 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 1 1 1 1 1
0 0

다음과 같은 테스트 케이스에선 섬의 개수가 9개가 나와야 하는데 14개가 있다고 뜹니다.

아마 스택 사이즈 문제인 거 같은데, 스택 사이즈를 좀 크게 늘려서 제출해보세요!

dbsdudtjr987 7년 전 1

gallopsys 님 댓글 너무 감사드립니다 .

stack 사이즈를 증가시켰더니 님께서 주신 테스트 케이스는 9개로 잘 출력이 되는데,

제출하니까 다시 틀렸습니다 라고 나옵니다.

혹시 한번만 더 도와주실수 있으시겠습니까??

어떤 예제에서 틀렸는지 알면 제가 생각해서 고치겠는데, 이렇게 그냥 틀렸습니다 라고 나오니

어디서 부터 손을 봐야할지 모르겠습니다 ㅠㅠ

gallopsys 7년 전 2

스택 사이즈를 얼마로 수정하셨나요?

dbsdudtjr987 7년 전 0

#define MAX_SIZE 100 에서

100 대신 2500과 100000 등등 여러 숫자들을 바꿔서 대입해 보았습니다.

dbsdudtjr987 7년 전 0

마지막으로 제출한 소스 코드입니다.

스택사이즈 100 -> 5000으로 수정했습니다.

#include<stdlib.h>
#include<stdio.h>
#define MAX_SIZE 5000
typedef struct stacktype {
	int stack_x[MAX_SIZE];
	int stack_y[MAX_SIZE];
	int top;
}stacktype;
void init(stacktype *s1) {
	s1->top = -1;
}
void push(stacktype *s1, int x, int y) {
	if (s1->top + 1 > MAX_SIZE)return;
	(s1->stack_x)[++(s1->top)] = x;
	(s1->stack_y)[(s1->top)] = y;
}
int* pop(stacktype *s1) {
	int temp[2];
	if (s1->top == -1)return NULL;
	temp[0] = s1->stack_x[s1->top];
	temp[1] = s1->stack_y[(s1->top)--];
	return temp;
}
void check_around(stacktype *s1, int x, int y, int w, int h, int **arr, int **check_arr) {

	int x_plus[8] = {0,1,1,1,0,-1,-1,-1};
	int y_plus[8] = {-1,-1,0,1,1,1,0,-1};

	for (int k = 0; k < 8; k++) {
		if (x + x_plus[k] >= w || y + y_plus[k] >= h || x + x_plus[k] < 0 || y + y_plus[k] < 0)continue;
		if (arr[y +y_plus[k]][x + x_plus[k]] == 1 && check_arr[y + y_plus[k]][x + x_plus[k]] != 1) {
			push(s1, x + x_plus[k], y + y_plus[k]);
			check_arr[y + y_plus[k]][x + x_plus[k]] = 1;
		}
	}
}
int count_island(int **arr, int **check_arr, int w, int h) {

	stacktype s1;
	init(&s1);

	int *temp, x, y, count = 0;

	for (int i = 0; i < h; i++) {
		for (int j = 0; j < w; j++) {
			if (arr[i][j] == 0 ||check_arr[i][j] == 1)continue;
			check_arr[i][j] = 1;
			check_around(&s1, j, i, w, h, arr, check_arr);
			while (1) {
				temp = pop(&s1);
				if (temp != NULL) {
					x = temp[0];
					y = temp[1];
					check_around(&s1, x, y, w, h, arr, check_arr);
				}
				else {
					count++;
					break;
				}
			}
		}
	}
	return count;
}
int main() {
	int w, h, **arr, **check_arr, temp_h, temp_w, w_s = 0, h_s = 0, result;
	while (1) {
		scanf("%d %d", &w, &h);
		if (w == 0 && h == 0)break;
		if (w > 50 || h > 50)printf("error\n"); continue;
		arr = (int**)malloc(sizeof(int*) * h);
		check_arr = (int**)malloc(sizeof(int*) * h);
		for (int i = 0; i < h; i++) {
			*(arr + i) = (int *)malloc(sizeof(int) * w);
			*(check_arr + i) = (int *)malloc(sizeof(int) * w);
		}
		temp_h = h;
		temp_w = w;
		while (temp_h--) {
			while (temp_w--) {
				scanf("%d", &arr[w_s][h_s++]);
			}
			w_s++;
			h_s = 0;
			temp_w = w;
		}
		result = count_island(arr, check_arr, w, h);
		printf("%d\n", result);

		free(check_arr);
		free(arr);
		w_s = 0;
		h_s = 0;
	}
}

gallopsys 7년 전 0

+ 추가로 스택을 구현하시면서 문제가 될만한 케이스를 발견했습니다!

100 100
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0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0

위와 같은 케이스는 섬의 개수가 1이 되어야 하는데, error가 뜨네요.

스택 사이즈로 무려 1억을 잡아도 error가 뜨는 걸로 봐선, 아마 스택을 구현하시는 과정에서 문제가 되는 부분이 있을 거라 짐작이 됩니다.

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