Submission #332098

#	Time	Username	Problem	Language	Result	Execution time	Memory
332098		Sho10	Quality Of Living (IOI10_quality)	C++14	100 / 100	2546 ms	113132 KiB

quality

#include <bits/stdc++.h> //Andrei Alexandru a.k.a Sho10
#include "quality.h"
#define ll long long
#define double long double
#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast")
#define all(a) (a).begin(), (a).end()
#define f first
#define s second
#define pb push_back
#define mp make_pair
#define pi pair
#define rc(s) return cout<<s,0
#define endl '\n'
#define mod 1000007
#define PI 3.14159265359
#define MAXN 100005
#define INF 1000000005
#define LINF 1000000000000000005ll
#define CODE_START  ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
using namespace std;
int a[3005][3005],pref[3005][3005],n,m,h,w;
int sum(int x2,int y2){
    int x1=x2-h+1;
    int y1=y2-w+1;
    return pref[x2][y2]-pref[x2][y1-1]-pref[x1-1][y2]+pref[x1-1][y1-1];
}
int check(int x){
for(int i=1;i<=n;i++)
{
    int nr=0;
    for(int j=1;j<=m;j++)
    {
        if(a[i][j]<=x){
            nr++;
        }
        pref[i][j]=pref[i-1][j]+nr;
    }
}
int mn=(h*w+1)/2;
for(int i=h;i<=n;i++)
{
    for(int j=w;j<=m;j++)
    {
        if(sum(i,j)>=mn){
            return 1;
        }
    }
}
return 0;
}
int rectangle(int R, int C, int H, int W, int Q[3001][3001]) {
n=R;
m=C;
h=H;
w=W;
for(int i=1;i<=n;i++)
{
    for(int j=1;j<=m;j++)
    {
        a[i][j]=Q[i-1][j-1];
            }
}
int l=1,r=n*m;
while(l<r){
    int mid=(l+r)/2;
    if(check(mid)){
        r=mid;
    }else l=mid+1;
}
return l;
}
/*
int32_t main(){
CODE_START;
*/

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