Submission #403920

#	Time	Username	Problem	Language	Result	Execution time	Memory
403920		rocks03	Rectangles (IOI19_rect)	C++14	25 / 100	5041 ms	22676 KiB

rect

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define pii pair<int, int>
#define pll pair<ll, ll>
#define ff first
#define ss second
#define pb push_back
#define SZ(x) ((int)(x).size())
#define all(x) x.begin(), x.end()
#define debug(x) cout << #x << ": " << x << " "
#define nl cout << "\n"
#define rep(i, a, b) for(int i = (a); i < (b); i++)
#define per(i, a, b) for(int i = (a); i >= (b); i--)
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

long long count_rectangles(vector<vector<int>> a){
    int N = SZ(a), M = SZ(a[0]);
    auto check = [&](int i1, int j1, int i2, int j2){
        rep(i, i1, i2 + 1){
            int mn = min(a[i][j1 - 1], a[i][j2 + 1]);
            int mx = -1;
            rep(j, j1, j2 + 1){
                mx = max(mx, a[i][j]);
            }
            if(!(mx < mn)) return false;
        }
        rep(j, j1, j2 + 1){
            int mn = min(a[i1 - 1][j], a[i2 + 1][j]);
            int mx = -1;
            rep(i, i1, i2 + 1){
                mx = max(mx, a[i][j]);
            }
            if(!(mx < mn)) return false;
        }
        return true;
    };
    ll ans = 0;
    rep(i, 1, N - 1){
        rep(j, 1, M - 1){
            rep(i2, i, N - 1){
                rep(j2, j, M - 1){
                    ans += check(i, j, i2, j2);
                }
            }
        }
    }
    return ans;
}

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