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답안 #462292

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
462292 2021-08-10T10:12:17 Z grt Akvizna (COCI19_akvizna) C++17
65 / 130
 925 ms 536 KB 
#include <bits/stdc++.h>
#define PB push_back
#define ST first
#define ND second
#define _ ios_base::sync_with_stdio(0); cin.tie(0);
//mt19937 rng(chrono::high_resolution_clock::now().time_since_epoch().count());

using namespace std;

using ll = long long;
using pi = pair<int,int>;
using vi = vector<int>;


const int nax = 3000 + 10;
int n, k;
long double dp[nax];
int cnt[nax];

int main() {_
	cin >> n >> k;
	long double low = 0.0, high = 1.0000, mid;
	for(int rep = 0; rep < 30; ++rep) {
		mid = (low + high) / 2.0;
		for(int used = 0; used <= n; ++used) {
			dp[used] = 0;
			cnt[used] = 0;
			for(int u1 = 1; u1 <= used; ++u1) {
				if(dp[used] < dp[used - u1] + (long double)u1 / (n - (used - u1)) - mid) {
					dp[used] = dp[used - u1] + (long double)u1 / (n - (used - u1)) - mid;
					cnt[used] = cnt[used - u1] + 1;
				}
			}
		}
		if(cnt[n] <= k) {
			high = mid;
		} else {
			low = mid;
		}
	}
	mid = high;
	for(int used = 0; used <= n; ++used) {
		dp[used] = 0;
		cnt[used] = 0;
		for(int u1 = 1; u1 <= used; ++u1) {
			if(dp[used] < dp[used - u1] + (long double)u1 / (n - (used - u1)) - mid) {
				dp[used] = dp[used - u1] + (long double)u1 / (n - (used - u1)) - mid;
				cnt[used] = cnt[used - u1] + 1;
			}
		}
	}
	cout << setprecision(10);
	cout << fixed;
	cout << dp[n] + mid * k; //<< " " << cnt[n];
}

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct

Subtask #2
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct

Subtask #3
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct

Subtask #4
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 204 KB Output is correct
2 Correct 2 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct

Subtask #5
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 746 ms 356 KB Output is correct
2 Correct 876 ms 480 KB Output is correct
3 Correct 749 ms 344 KB Output is correct

Subtask #6
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 852 ms 460 KB Output is correct
2 Correct 881 ms 352 KB Output is correct
3 Correct 768 ms 468 KB Output is correct

Subtask #7
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 806 ms 356 KB Output is correct
2 Correct 653 ms 352 KB Output is correct
3 Correct 671 ms 352 KB Output is correct

Subtask #8
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 827 ms 344 KB Output is correct
2 Correct 925 ms 356 KB Output is correct
3 Correct 718 ms 352 KB Output is correct

Subtask #9
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 784 ms 344 KB Output is correct
2 Correct 864 ms 352 KB Output is correct
3 Correct 699 ms 352 KB Output is correct

Subtask #10
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 648 ms 348 KB Output is correct
2 Correct 878 ms 348 KB Output is correct
3 Correct 837 ms 460 KB Output is correct

Subtask #11
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 865 ms 348 KB Output is correct
2 Correct 879 ms 344 KB Output is correct
3 Correct 812 ms 460 KB Output is correct

Subtask #12
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 761 ms 340 KB Output is correct
2 Correct 826 ms 356 KB Output is correct
3 Correct 772 ms 348 KB Output is correct

Subtask #13
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 871 ms 348 KB Output is correct
2 Correct 787 ms 364 KB Output is correct
3 Correct 764 ms 352 KB Output is correct

Subtask #14
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 58 ms 452 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #15
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 58 ms 480 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #16
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 57 ms 476 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #17
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 58 ms 476 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #18
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 60 ms 536 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #19
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 60 ms 476 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #20
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 57 ms 456 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #21
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 57 ms 488 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #22
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 57 ms 476 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #23
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 58 ms 452 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #24
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 61 ms 468 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #25
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 57 ms 476 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #26
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 57 ms 480 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -