Submission #800133

#	Time	Username	Problem	Language	Result	Execution time	Memory
800133		GoldLight	Quality Of Living (IOI10_quality)	C++17	100 / 100	1328 ms	140368 KiB

quality

#include <bits/stdc++.h>
using namespace std;

int rectangle(int r, int c, int h, int w, int q[3001][3001]) {
	int n=r*c, m=h*w;
    int ans=n, ki=1, ka=n;
    while(ki<=ka){
        int mid=(ki+ka)/2;
        vector<vector<int>> pref(r+1, vector<int>(c+1, 0));
        bool cek=false;
        //count qij<=mid
        for(int i=0; i<r; i++){
            for(int j=0; j<c; j++){
                pref[i+1][j+1]=(q[i][j]<=mid)+pref[i][j+1]+pref[i+1][j]-pref[i][j];
                if(i>=h-1 && j>=w-1 && pref[i+1][j+1]-pref[i-h+1][j+1]-pref[i+1][j-w+1]+pref[i-h+1][j-w+1]>=m/2+1){
                    cek=true;
                    break;
                }
            }
        }
        if(cek){
            ans=mid;
            ka=mid-1;
        }
        else ki=mid+1;
    }
    return ans;
}
// int main(){
//     int r, c, h, w; cin>>r>>c>>h>>w;
//     for(int i=0; i<r; i++){
//         for(int j=0; j<c; j++){
//             cin>>q[i][j];
//         }
//     }
//     cout<<rectangle(r, c, h, w);
// }

• Subtask 1: 20 / 20
• Subtask 2: 20 / 20
• Subtask 3: 20 / 20
• Subtask 4: 20 / 20
• Subtask 5: 20 / 20