oj.uz

답안 #553628

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
553628 2022-04-26T12:30:45 Z QwertyPi 구경하기 (JOI13_watching) C++14
0 / 100
 1000 ms 15960 KB 
#include <bits/stdc++.h>
#define N 2013
using namespace std;

int dp[N][N];

int n, p, q;
vector<int> a;

bool ok(int w){
	for(int i = 0; i <= n; i++) for(int j = 0; j <= n; j++) dp[i][j] = (1 << 30); dp[0][0] = 0;
	for(int j = 0; j <= n; j++){
		for(int i = 1; i <= n; i++){
			int w1 = upper_bound(a.begin(), a.end(), a[i - 1] - w) - a.begin();
			int w2 = upper_bound(a.begin(), a.end(), a[i - 1] - w * 2) - a.begin();
			if(j > 0) dp[i][j] = min(dp[i][j], dp[w2][j - 1]);
			dp[i][j] = min(dp[i][j], dp[w1][j] + 1);
		}
		for(int i = 1; i <= n; i++) dp[i][j + 1] = min(dp[i][j], dp[i][j + 1]);
	}
	return dp[n][q] <= p;
}

int main(){
	cin >> n >> p >> q;
	for(int i = 0; i < n; i++){
		int v; cin >> v;
		a.push_back(v);
	}
	sort(a.begin(), a.end());
	int l, r;
	for(l = 0, r = 1e9 + 1; l != r;){
		int m = (l + r) / 2;
		if(ok(m)){
			r = m;
		}else{
			l = m + 1;
		}
	}
	cout << l << endl;
}

Compilation message

watching.cpp: In function 'bool ok(int)':
watching.cpp:11:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   11 |  for(int i = 0; i <= n; i++) for(int j = 0; j <= n; j++) dp[i][j] = (1 << 30); dp[0][0] = 0;
      |  ^~~
watching.cpp:11:80: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   11 |  for(int i = 0; i <= n; i++) for(int j = 0; j <= n; j++) dp[i][j] = (1 << 30); dp[0][0] = 0;
      |                                                                                ^~

Subtask #1
0 / 50.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 724 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 9 ms 748 KB Output is correct
5 Incorrect 9 ms 752 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #2
0 / 50.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1089 ms 15960 KB Time limit exceeded
2 Halted 0 ms 0 KB -