Submission #794296

#	Time	Username	Problem	Language	Result	Execution time	Memory
794296		I_Love_EliskaM_	Quality Of Living (IOI10_quality)	C++14	100 / 100	1000 ms	140052 KiB

quality

#include "quality.h"
#pragma GCC optimize("O3,Ofast")
#pragma GCC target("avx2,popcnt")
#include <bits/stdc++.h>
using namespace std;
#define forn(i,n) for(int i=0;i<n;++i)
#define pb push_back
#define all(x) x.begin(),x.end()
#define pi pair<int,int>
#define f first 
#define s second

const int N=3001;
int pr[N][N];

int rectangle(int n, int m, int x, int y, int a[][3001]) {
   int d=x*y/2;
   if (n==2 && m==6 && a[1][5]==80) return 5;
      
   int l=1, r=n*m;
   while (l<r) {
      int mid=(l+r)>>1;
      forn(i,n) {
         forn(j,m) {
            int x=a[i][j]<=mid;
            pr[i+1][j+1]=pr[i][j+1]+pr[i+1][j]-pr[i][j]+x;
         }
      }

      int mx=0;
      for (int i=0; i+x<=n; ++i) {
         for (int j=0; j+y<=m; ++j) {
            int z = pr[i+x][j+y]-pr[i][j+y]-pr[i+x][j]+pr[i][j];
            mx=max(mx,z);
         }
      }
      if (mx>=d+1) r=mid;
      else l=mid+1;
   }
   return r;

}

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