Submission #1180799
Source Code Expand
#include <iostream> #include <algorithm> #include <iomanip> #include <vector> #include <functional> #define ll long long using namespace std; ll K, N; ll w[1010], p[1010]; bool C(double x) { vector<double> y(N); for (int i = 0; i < N;i++) { y[i] = w[i] * (p[i] - x); } sort(y.begin(), y.end()); double sum = 0; for (int i = N - 1; i > N - 1 - K; i--) { sum += y[i]; } return (sum / 100) >= 0; } int main() { cin.tie(0); ios::sync_with_stdio(false); cin >> N >> K; for (int i = 0; i < N; i++) cin >> w[i] >> p[i]; double lb = 0, ub = 100; for (int i = 0; i < 100;i++) { double mid = (lb + ub) / 2.0; if (C(mid)) lb = mid; else ub = mid; } cout << fixed << setprecision(15) << ub << endl; }
Submission Info
Submission Time | |
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Task | D - 食塩水 |
User | clavis1107 |
Language | C++14 (GCC 5.4.1) |
Score | 100 |
Code Size | 753 Byte |
Status | AC |
Exec Time | 8 ms |
Memory | 892 KB |
Judge Result
Set Name | Sample | All | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 100 / 100 | ||||
Status |
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Set Name | Test Cases |
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Sample | s0.txt, s1.txt |
All | 000.txt, 001.txt, 002.txt, 003.txt, 004.txt, 005.txt, 006.txt, 007.txt, 008.txt, 009.txt, 010.txt, 011.txt, 012.txt, 013.txt, 014.txt, 015.txt, 016.txt, 017.txt, 018.txt, 019.txt, s0.txt, s1.txt |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
000.txt | AC | 8 ms | 892 KB |
001.txt | AC | 1 ms | 256 KB |
002.txt | AC | 4 ms | 256 KB |
003.txt | AC | 1 ms | 256 KB |
004.txt | AC | 4 ms | 256 KB |
005.txt | AC | 4 ms | 256 KB |
006.txt | AC | 4 ms | 256 KB |
007.txt | AC | 4 ms | 256 KB |
008.txt | AC | 4 ms | 256 KB |
009.txt | AC | 1 ms | 256 KB |
010.txt | AC | 4 ms | 256 KB |
011.txt | AC | 2 ms | 256 KB |
012.txt | AC | 4 ms | 256 KB |
013.txt | AC | 2 ms | 256 KB |
014.txt | AC | 4 ms | 256 KB |
015.txt | AC | 3 ms | 256 KB |
016.txt | AC | 4 ms | 256 KB |
017.txt | AC | 3 ms | 256 KB |
018.txt | AC | 4 ms | 256 KB |
019.txt | AC | 3 ms | 256 KB |
s0.txt | AC | 1 ms | 256 KB |
s1.txt | AC | 1 ms | 256 KB |