Submission #405045

#	Time	Username	Problem	Language	Result	Execution time	Memory
405045		rocks03	Rectangles (IOI19_rect)	C++14	0 / 100	5039 ms	28280 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(i1, 1, N - 1){
        rep(i2, i1, N - 1){
            rep(j1, 1, N - 1){
                rep(j2, j1, N - 1){
                    if(check(i1, j1, i2, j2)) ans++;
                }
            }
        }
    }
    return ans;
}

Compilation message (stderr)

rect.cpp: In function 'long long int count_rectangles(std::vector<std::vector<int> >)':
rect.cpp:18:20: warning: unused variable 'M' [-Wunused-variable]
   18 |     int N = SZ(a), M = SZ(a[0]);
      |                    ^

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