Submission #824375

#	Time	Username	Problem	Language	Result	Execution time	Memory
824375		peteza	Let's Win the Election (JOI22_ho_t3)	C++14	5 / 100	2566 ms	212 KiB

Main

#include <bits/stdc++.h>
using namespace std;

bool vis[505];
int n, k;
int as, bs;
vector<pair<int, int>> a, b;

int todo=0,ptr=0;
long double ans = 1e18, csum = 0;

int main() {
    cin >> n >> k;
    for(int i=0;i<n;i++) {
        cin >> as >> bs;
        a.emplace_back(as, i);
        b.emplace_back(bs==-1 ? INT_MAX :bs, i);
    }
    sort(a.begin(), a.end()); sort(b.begin(), b.end());
    for(int selb=0;selb<=b.size();selb++) {
        vector<bool> vis(n, 0);
        todo = k; csum = 0; ptr = 0;
        bool broke = 0;
        for(int i=0;i<selb;i++) {
            if(b[i].first == INT_MAX) broke = 1;
            vis[b[i].second] = 1;
            csum += 1.00*b[i].first/(i+1); todo--;
        }
        if(broke) break;
        while(ptr<n&&todo > 0){
            if(vis[a[ptr].second]) continue;
            csum += 1.00*a[ptr].first/(selb+1);
            todo--; ptr++;
        }
        if(todo<=0) ans = min(ans, csum);
    }
    cout << ans;
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:20:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |     for(int selb=0;selb<=b.size();selb++) {
      |                    ~~~~^~~~~~~~~~

• Subtask 1: 5 / 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