Submission #877592

#	Time	Username	Problem	Language	Result	Execution time	Memory
877592		mychecksedad	Let's Win the Election (JOI22_ho_t3)	C++17	10 / 100	15 ms	472 KiB

Main

/* Author : Mychecksdead  */
#include<bits/stdc++.h>
using namespace std;
#define ll long long int
#define MOD (1000000000+7)
#define MOD1 (998244353)
#define pb push_back
#define all(x) x.begin(), x.end()
#define en cout << '\n'
const int N = 1e6+100, M = 1e5+10, K = 52, MX = 30;


int n, k;
array<double, 2> a[N];
void solve(){
  cin >> n >> k;
  for(int i = 1; i <= n; ++i){
     cin >> a[i][1] >> a[i][0];
     if(a[i][0] == -1) a[i][0] = MOD;
  }
  sort(a+1, a+1+n);
  double best = 1000000000;
  for(int i = 0; i <= n; ++i){
    double ans = 0;
    double x = 1;
    if(i > 0 && a[i][0] == MOD) break;
    for(int j = 1; j <= i; ++j){
      ans += a[j][0] / x;
      ++x;
    }
    if(k <= i){ best = min(ans, best); break;}
    sort(a+i+1, a+1+n, [&](const array<double, 2> &z, const array<double, 2> &w){
      return z[1] < w[1];
    });
    for(int j = i + 1; j <= k; ++j){
      ans += a[j][1] / x;
      // cout << a[j][1] << ' ';
    }
    best = min(best,ans);
    sort(a+1, a+1+n);
    // cout << best << ' ';
  }
  cout << fixed << setprecision(15);
  cout << best;
}


int main(){
  cin.tie(0); ios::sync_with_stdio(0);
  int tt = 1, aa;
  // freopen("in.txt", "r", stdin);
  // freopen("out.txt", "w", stdout);
  while(tt--){
    solve();
    en;
  }
  cerr<<"time taken : "<<(float)clock()/CLOCKS_PER_SEC<<" seconds\n";
  return 0;
} 

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:50:15: warning: unused variable 'aa' [-Wunused-variable]
   50 |   int tt = 1, aa;
      |               ^~

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 0 / 11
• Subtask 4: 0 / 12
• Subtask 5: 0 / 33
• Subtask 6: 0 / 11
• Subtask 7: 0 / 23