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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. #define int              long long int
  4. #define double           long double
  5. #define print(a)         for(auto x : a) cout << x << " "; cout << endl
  6.  
  7.  
  8. const int M = 1000000007;
  9. const int N = 3e5+9;
  10. const int INF = 2e9+1;
  11. const int LINF = 2000000000000000001;
  12.  
  13. inline int power(int a, int b) {
  14.     int x = 1;
  15.     a %= M;
  16.     while (b) {
  17.         if (b & 1) x = (x * a) % M; 
  18.         a = (a * a) % M;
  19.         b >>= 1;
  20.     }
  21.     return x;
  22. }
  23.  
  24.  
  25. //_ ***************************** START Below *******************************
  26.  
  27.  
  28.  
  29. vector<int> a; //* Val
  30. vector<int> b; //* Wg
  31.  
  32. double consistency(int n, int x){
  33.  
  34. 	vector<pair<int,int>> p;
  35. 	for(int i=0; i<n; i++){
  36. 		p.push_back({a[i], b[i]});
  37. 	}
  38.  
  39. 	//* Sort by V/W basis decreasing order
  40.     sort(begin(p), end(p), [](const pair<int,int>& a, const pair<int,int>& b){
  41.         return a.first * b.second > b.first * a.second;
  42.     });
  43.  
  44.  
  45.     double ans = 0;
  46.  
  47.     for(int i=0; i<n; i++){
  48.     	double v = p[i].first;
  49.     	double w = p[i].second;
  50.     	double rem = w;
  51.  
  52.     	if(x-w < 0){
  53.     		rem = x;
  54.     	}
  55.  
  56.     	v = (rem/w) * v;
  57. 		x -= rem; 	
  58. 		ans += v;    	
  59.     }
  60.  
  61.  
  62.  
  63.     return ans;    
  64. }
  65.  
  66.  
  67.  
  68.  
  69.  
  70.  
  71.  
  72.  
  73.  
  74.  
  75.  
  76.  
  77.  
  78.  
  79.  
  80. double practice(int n, int x){
  81.  
  82.  
  83.     return 0;
  84. }
  85.  
  86.  
  87.  
  88.  
  89.  
  90. void solve() {
  91.  
  92.     int n, x;
  93.     cin>> n >> x;
  94.  
  95.     a.resize(n);
  96.     b.resize(n);
  97.     for(int i=0; i<n; i++) cin >> a[i];
  98.     for(int i=0; i<n; i++) cin >> b[i];
  99.  
  100.     cout << fixed << setprecision(7) << consistency(n, x) << endl;
  101.  
  102.  
  103. }
  104.  
  105.  
  106.  
  107.  
  108.  
  109. int32_t main() {
  110.     ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  111.  
  112.     int t = 1;
  113.     // cin >> t;
  114.     while (t--) {
  115.         solve();
  116.     }
  117.  
  118.     return 0;
  119. }
Success #stdin #stdout 0s 5324KB
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stdout
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240.0000000
https://ideone.com/i81NE2
language:
C++14 (gcc 8.3)
created:
1 hour ago
visibility:
public

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