Submission #1679575
Source Code Expand
#include <bits/stdc++.h> using namespace std; #define FOR(i, n) for(int i = 0; i < (n); i++) #define MEM(a, x) memset(a, x, sizeof(a)) #define ALL(a) a.begin(), a.end() #define UNIQUE(a) a.erase(unique(ALL(a)), a.end()) typedef long long ll; int n, k; double w[1005], p[1005]; bool C(double x) { vector<double> v(n); FOR(i, n) v[i] = (p[i]-x)*w[i]; sort(v.rbegin(), v.rend()); double ret = 0; FOR(i, k) ret += v[i]; return ret >= 0; } int main(int argc, char const *argv[]) { ios_base::sync_with_stdio(false); cin >> n >> k; FOR(i, n) cin >> w[i] >> p[i]; double l = 0, r = 100; FOR(i, 100) { double mid = (l+r)/2; if (C(mid)) l = mid; else r = mid; } printf("%.10lf\n", l); return 0; }
Submission Info
Submission Time | |
---|---|
Task | D - 食塩水 |
User | moguta |
Language | C++14 (GCC 5.4.1) |
Score | 100 |
Code Size | 741 Byte |
Status | AC |
Exec Time | 5 ms |
Memory | 256 KB |
Judge Result
Set Name | Sample | All | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 100 / 100 | ||||
Status |
|
|
Set Name | Test Cases |
---|---|
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 | 5 ms | 256 KB |
001.txt | AC | 2 ms | 256 KB |
002.txt | AC | 5 ms | 256 KB |
003.txt | AC | 2 ms | 256 KB |
004.txt | AC | 5 ms | 256 KB |
005.txt | AC | 5 ms | 256 KB |
006.txt | AC | 5 ms | 256 KB |
007.txt | AC | 4 ms | 256 KB |
008.txt | AC | 5 ms | 256 KB |
009.txt | AC | 2 ms | 256 KB |
010.txt | AC | 5 ms | 256 KB |
011.txt | AC | 3 ms | 256 KB |
012.txt | AC | 5 ms | 256 KB |
013.txt | AC | 2 ms | 256 KB |
014.txt | AC | 5 ms | 256 KB |
015.txt | AC | 4 ms | 256 KB |
016.txt | AC | 5 ms | 256 KB |
017.txt | AC | 3 ms | 256 KB |
018.txt | AC | 5 ms | 256 KB |
019.txt | AC | 4 ms | 256 KB |
s0.txt | AC | 1 ms | 256 KB |
s1.txt | AC | 1 ms | 256 KB |