Submission #1689550
Source Code Expand
#include <bits/stdc++.h> #include <stdio.h> using namespace std; #define INF 2147483647 #define LINF 9223372036854775807 #define FOR(i,a,b) for (int i = (a); i < (b); ++i) #define REP(i,n) FOR(i,0,n) #define ALL(v) (v).begin(), (v).end() typedef long long ll; typedef pair<ll, int> P; int n,k; ll w[1000],p[1000]; bool check(double x) { vector<double> v(n); REP(i,n) v[i]=w[i]*(p[i]-x); sort(v.rbegin(),v.rend()); double sum=0; REP(i,k) sum+=v[i]; return sum>=0; } int main(){ //cin.tie(0); //ios::sync_with_stdio(false); cin>>n>>k; REP(i,n) cin>>w[i]>>p[i]; double low=0,up=100; REP(i,100) { double mid=(low+up)/2; if(check(mid)) low=mid; else up=mid; } printf("%f\n",low); return 0; }
Submission Info
Submission Time | |
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Task | D - 食塩水 |
User | moko_freedom |
Language | C++14 (GCC 5.4.1) |
Score | 100 |
Code Size | 758 Byte |
Status | AC |
Exec Time | 5 ms |
Memory | 256 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 | 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 | 3 ms | 256 KB |
s0.txt | AC | 1 ms | 256 KB |
s1.txt | AC | 1 ms | 256 KB |