Submission #826169

#	Time	Username	Problem	Language	Result	Execution time	Memory
826169		Ahmed57	Quality Of Living (IOI10_quality)	C++17	100 / 100	1092 ms	140160 KiB

quality

#include <bits/stdc++.h>
using namespace std;
int rectangle(int R, int C, int H, int W, int  Q[3001][3001]){
    int l = 1 , r = (R*C) ,ans = 0;
    while(l<=r){
        int mid = (l+r)/2;
        int pref[R+1][C+1];
        memset(pref,0,sizeof pref);
        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];
            }
        }
        bool ss = 0;
        for(int i = H;i<=R;i++){
            for(int j = W;j<=C;j++){
                if(pref[i][j]-pref[i-H][j]-pref[i][j-W]+pref[i-H][j-W]>=(H*W+1)/2){
                    ss = 1;
                }
            }
        }
        if(ss){
            ans = mid;
            r = mid-1;
        }else l = mid+1;
    }
    return ans;
}

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