oj.uz

답안 #425316

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
425316 2021-06-12T21:04:58 Z dreezy 삶의 질 (IOI10_quality) C++17
40 / 100
 5000 ms 3652 KB 
#include <bits/stdc++.h>
#include "quality.h"
using namespace std;

set<int> active;

int getmedian(){
	int cnt = 0;
	int median = -1;
	for(int a : active){
		if(cnt == active.size() / 2){
			median = a;
			break;
		}
		cnt++;
	}
	return median;
}

int rectangle(int R, int C, int H, int W, int Q[3001][3001]) {
	active.clear();
	for(int top = 0; top < H; top ++){
		for(int left = 0; left < W; left++ ){
			active.insert(Q[top][left]);
		}
	}
	int ans = getmedian();
	for(int top = 0; top <= R - H; top++){
		
		//cout << top <<":\n";
		//if top % 2 === 0, we go from left to right
		
		if(top % 2 == 0){
			
			if(top > 0){
				for(int left = 0; left < W; left++ ){
					active.erase(Q[top - 1][left]);
					active.insert(Q[top + H - 1][left]);
				}
				ans = min(ans, getmedian());
			}
			for(int left = 1; left <=C - W;left++){
			//iterate left boundary of rectangle
				//cout << left << "->";
				for(int t = top; t < top + H; t++){
					active.erase(Q[t][left - 1]);
					active.insert(Q[t][left + W - 1]);
				}
				ans = min(ans, getmedian());
			}
		}
		else{
			if(top > 0){
				for(int right =  C - 1; right >= C - W; right-- ){
					active.erase(Q[top - 1][right]);
					active.insert(Q[top + H - 1][right]);
				}
				ans = min(ans, getmedian());
			}
			//we go from right to left
			for(int right = C  - 2; right >=W - 1; right--){
				//cout << right <<"->";
			//iterate left boundary of rectangle
				for(int t = top; t < top + H; t++){
					active.erase(Q[t][right + 1]);
					active.insert(Q[t][right - W +1]);
				}
				ans = min(ans, getmedian());
			}
		}
	
	//cout << endl;
	}
	
	return ans;
}

/***********/

Compilation message

quality.cpp: In function 'int getmedian()':
quality.cpp:11:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::set<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   11 |   if(cnt == active.size() / 2){
      |      ~~~~^~~~~~~~~~~~~~~~~~~~

Subtask #1
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 460 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 460 KB Output is correct
4 Correct 63 ms 848 KB Output is correct
5 Correct 64 ms 716 KB Output is correct
6 Correct 30 ms 972 KB Output is correct

Subtask #3
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 460 KB Output is correct
4 Correct 63 ms 848 KB Output is correct
5 Correct 64 ms 716 KB Output is correct
6 Correct 30 ms 972 KB Output is correct
7 Execution timed out 5062 ms 3652 KB Time limit exceeded
8 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 460 KB Output is correct
4 Correct 63 ms 848 KB Output is correct
5 Correct 64 ms 716 KB Output is correct
6 Correct 30 ms 972 KB Output is correct
7 Execution timed out 5062 ms 3652 KB Time limit exceeded
8 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 460 KB Output is correct
4 Correct 63 ms 848 KB Output is correct
5 Correct 64 ms 716 KB Output is correct
6 Correct 30 ms 972 KB Output is correct
7 Execution timed out 5062 ms 3652 KB Time limit exceeded
8 Halted 0 ms 0 KB -