Submission #501039

#	Time	Username	Problem	Language	Result	Execution time	Memory
501039		beaconmc	Quality Of Living (IOI10_quality)	C++14	0 / 100	49 ms	35772 KiB

quality

#include <bits/stdc++.h>
typedef long long ll;
#define FOR(i,x,y) for(ll i=x; i<y; i++)
#define FORNEG(i,x,y) for(ll i=x; i>y; i--)
using namespace std;

#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
  
#define ordered_set tree<ll, null_type,less<ll>, rb_tree_tag,tree_order_statistics_node_update>

int pos[9000001][2];
int pref[3001][3001];
int r,c,h,w;


bool check(int x){
    FOR(i,0,3000){
        FOR(j,0,3000){
            pref[i][j] = 0;
        }
    }

    FOR(i,1,x+1){
        int a = pos[i][0]; int b=pos[i][1];
        FORNEG(j,a,max(-1, a-h)){
            pref[j][b+1] -= 1;
        }
        b = max(0, b-(w-1));
        FORNEG(j,a,max(-1, a-h)){
            pref[j][b] += 1;
        }
    }

    FOR(i,0,r){
        FOR(j,1,c){
            pref[i][j] += pref[i][j-1];
            if (pref[i][j]> int(h*w/2)) return true;
        }
    }
    return false;
}


int rectangle(int R, int C, int H, int W, int Q[3001][3001]) {
    r = R; c = C; h = H; w = W;
    FOR(i,0,R){
        FOR(j,0,C){
            pos[Q[i][j]][0] = i;
            pos[Q[i][j]][1] = j;
        }
    }
    int lo = 0;
    int hi = int(R*C/2)+1;

    while (lo < hi) {
		int mid = lo + (hi - lo) / 2;
		if (check(mid)) {
			hi = mid;
		} else {
			lo = mid + 1;
		}
	}
	return lo;
}

• Subtask 1: 0 / 20
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 20
• Subtask 5: 0 / 20