100%AC

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