C는 틀렸다고 나오고, 파이썬은 런타임에러가 나옵니다..

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
int main()
{
    int N;
    scanf("%d", &N);
    if (N == 0)
    {
        printf("0");
    }
    else
    {
        int num[1001][5] = { 0, };
        int student[1001][5] = { 0, };
        for (int i = 0; i < N; i++)
        {
            for (int j = 0; j < 5; j++)
            {
                scanf("%d", &student[i][j]);
            }
        }
        for (int i = 0; i < N; i++)
        {
            for (int j = 0; j < 5; j++)
            {
                for (int k = 0; k < N; k++)
                {
                    if (student[i][j] == student[k][j])
                    {
                        num[i][k] += 1;
                    }
                }
            }
        }
        int ans[1001] = { 0, };
        for (int i = 0; i < N; i++)
        {
            for (int j = 0; j < 5; j++)
            {
                if (num[i][j] != 0)
                    ans[i]++;
            }
        }
        int max = -1;
        int x = 0;
        for (int i = 0; i < N; i++)
        {
            if (max < ans[i])
            {
                max = ans[i];
                x = i;
            }
            
        }
        printf("%d", x + 1);
    }
}

파이썬
N=int(input())
if(N==0):
    print(0)
else:
    student=[]
    num=[[0]*5 for i in range(N+1)]
    for i in range(N):
        student.append(list(map(int,input().split())))
    for i in range(N):
        for j in range(5):
            for k in range(N):
                if(student[i][j]==student[k][j]):
                    num[i][k]+=1                 
    ans=[0]*N
    for i in range(N):
        for j in range(5):
            if(num[i][j]!=0):
                ans[i]+=1
    print(ans.index(max(ans))+1)