Submission #923827

#	Time	Username	Problem	Language	Result	Execution time	Memory
923827		OAleksa	Let's Win the Election (JOI22_ho_t3)	C++14	0 / 100	1518 ms	596 KiB

Main

#include <bits/stdc++.h>
using namespace std;
#define f first
#define s second
#define int long long
const int N = 550;
const int inf = 1e18;
int n, k;
pair<int, int> a[N];
signed main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  int tt = 1;
  //cin >> tt;
  while (tt--) {
  	cin >> n >> k;
  	for (int i = 0;i < n;i++) {
  		cin >> a[i].f >> a[i].s;
  		if (a[i].s == -1)
  			a[i].s = inf;
  	}
  	double ans = inf;
  	for (int mask = 1;mask < (1 << n);mask++) {
  		vector<pair<int, int>> gas;
  		vector<int> tm;
  		for (int i = 0;i < n;i++) {
  			if (mask & (1 << i)) {
  				gas.push_back(a[i]);
  				tm.push_back(a[i].f);
  			}
  		}
  		int m = gas.size();
  		if (m != k)
  			continue;
  		sort(gas.begin(), gas.end(), [&](pair<int, int> x, pair<int, int> y) {
	  		if (x.s == y.s)
	  			return x.f > y.f;
	  		return x.s < y.s;
  		});
  		sort(tm.begin(), tm.end());
			double z = 0;
	  	for (int i = 0;i < k;i++)
	  		z += tm[i];
			double t = 0;
	  	for (int i = 1;i < k;i++) {
	  		t += (double)gas[i - 1].s / i;
	  		vector<int> x;
	  		for (int j = i;j < m;j++) 
	  			x.push_back(gas[j].f);
	  		sort(x.begin(), x.end());
	  		double res = t;
	  		for (int j = 0;j < k - i;j++) 
	  			res += (double)x[j] / (i + 1);
	  		z = min(z, res);
	  	}
	  	ans = min(ans, z);
  	}
	  cout << fixed << setprecision(15) << ans;
  }
  return 0;
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:43:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   43 |     for (int i = 0;i < k;i++)
      |     ^~~
Main.cpp:45:4: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   45 |    double t = 0;
      |    ^~~~~~

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