100%AC

#include<cstdio>
int main(){
    int a[1001][1001],n,m,x;
    scanf("%d %d",&n,&m);
    for(int i=1;i<=n;i++){
        for(int j=1;j<=m;j++){
            scanf("%d ",&a[i][j]);
        }
        scanf("\n");
    }
    scanf("\n%d",&x);
    for(int k=1;k<=n;k++){
        printf("%d ",a[k][x]);
    }
}