제출 #208887

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
208887		DodgeBallMan	삶의 질 (IOI10_quality)	C++14	0 / 100	67 ms	35960 KiB

quality

#include "quality.h"
#include <bits/stdc++.h>

#define pii pair<int, int>
#define x first
#define y second

using namespace std;

const int N = 3e3+5;

int sum[N][N], n, c, r, h, w;
pii pos[N*N];


bool chk( int mid, int rec[3001][3001] ) {
    memset( sum, 0, sizeof sum );
    for( int i = mid + 1 ; i <= n ; i++ ) sum[pos[i].x][pos[i].y]++;
    for( int i = 1 ; i <= r ; i++ )
        for( int j = 1 ; j <= c ; j++ )
            sum[i][j] += sum[i-1][j] + sum[i][j-1] - sum[i-1][j-1];
    for( int i = h ; i <= r ; i++ ) 
        for( int j = w ; j <= c ; j++ ) 
            if( sum[i][j] - sum[i-h][j] - sum[i][j-w] + sum[i-h][j-w] <= h * w / 2 ) return true;
        
    return false;
}

int rectangle( int R, int C, int H, int W, int rec[3001][3001] ) {
    r = R, c = C, w = W, h = H;
    n = r*c;
	for( int i = 0 ; i < r ; i++ ) for( int j = 0 ; j < c ; j++ ) pos[rec[i][j]] = pii( i+1, j+1 );
    int l = 1, r = n;
    while( l < r ) {
        int m = l + r + 1 >> 1;
        if( chk( m, rec ) ) l = m;
        else r = m - 1;
    }
	return l;
}

컴파일 시 표준 에러 (stderr) 메시지

quality.cpp: In function 'int rectangle(int, int, int, int, int (*)[3001])':
quality.cpp:35:23: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
         int m = l + r + 1 >> 1;
                 ~~~~~~^~~

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