Submission #423307

#	Time	Username	Problem	Language	Result	Execution time	Memory
423307		Monchito	Rectangles (IOI19_rect)	C++14	37 / 100	5070 ms	28228 KiB

rect

#include "rect.h"
using namespace std;
using ll = long long;
using vi = vector<int>;
using vvi = vector<vi>;

int n, m;

bool can(int r1, int r2, int c1, int c2, vvi& a){
    for(int i=r1; i<=r2; i++){
        for(int  j=c1; j<=c2; j++){
            if(a[i][j] >= a[i][c1-1] || a[i][j] >= a[i][c2+1])
                return false;

            if(a[i][j] >= a[r1-1][j] || a[i][j] >= a[r2+1][j])
                return false;
        }
    }

    return true;
}

ll count_rectangles(vvi a) {
    ll ret = 0;
    n = a.size(); 
    m = a[0].size();

    for(int r1=1; r1<n-1; r1++){
        for(int r2=r1; r2<n-1; r2++){
            for(int c1=1; c1<m-1; c1++){
                for(int c2=c1; c2<m-1; c2++){
                    if(can(r1, r2, c1, c2, a)) ret++; 
                }
            }
        }
    }

	return ret;
}

• Subtask 1: 8 / 8
• Subtask 2: 7 / 7
• Subtask 3: 12 / 12
• Subtask 4: 0 / 22
• Subtask 5: 10 / 10
• Subtask 6: 0 / 13
• Subtask 7: 0 / 28