Submission #256037

#TimeUsernameProblemLanguageResultExecution timeMemory
256037b00n0rpRectangles (IOI19_rect)C++17
37 / 100
64 ms48760 KiB
#include "rect.h"
#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define vi vector<int>
#define pb push_back
#define REP(i,n) for(int i = 0; i < n; i++)
#define FOR(i,a,b) for(int i = a; i < b; i++)

const int MX = 205;

int n,m;
bitset<MX> hor[MX][MX],ver[MX][MX];
bitset<MX> gg[MX];

ll count_rectangles(vector<vi> a) {
	n = a.size();
	m = a[0].size();
	if(n <= 2) return 0;
	ll ans = 0;
	if(n == 3){
		FOR(i,1,m-1){
			int mx = -1;
			FOR(j,i,m-1){
				if(a[1][j] >= min(a[0][j],a[2][j])) break;
				mx = max(mx,a[1][j]);
				ans += (mx < min(a[1][i-1],a[1][j+1])); 
			}
		}
		return ans;
	}
	REP(i,n){
		REP(j,m){
			int mx = -1;
			FOR(k,j,m){
				mx = max(mx,a[i][k]);
				hor[j][k][i] = (j and k < m-1 and mx < min(a[i][j-1],a[i][k+1]));
			}
		}
	}
	REP(j,m){
		REP(i,n){
			int mx = -1;
			FOR(k,i,n){
				mx = max(mx,a[k][j]);
				ver[i][k][j] = (i and k < n-1 and mx < min(a[i-1][j],a[k+1][j]));
			}
		}
	}
	REP(i1,n){
		REP(j1,m){
			FOR(i2,i1,n){
				gg[i2].reset();
			}
			FOR(i2,i1,n){
				FOR(j2,j1,m){
					if(!ver[i1][i2][j2]) break;
					gg[i2][j2] = 1;
				}
			}
			FOR(j2,j1,m){
				FOR(i2,i1,n){
					if(!hor[j1][j2][i2]) break;
					ans += gg[i2][j2];
				}
			}
		}
	}
	return ans;
}
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