Submission #831093

#	Time	Username	Problem	Language	Result	Execution time	Memory
831093		vjudge1	Let's Win the Election (JOI22_ho_t3)	C++17	100 / 100	1190 ms	4812 KiB

Main

#ifdef Home
#define _GLIBCXX_DEBUG
#endif // Home

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef long double ld;

ld dp[555][555], ans = 1e9;

main() {
#ifdef Home
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
#endif // Home
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    
    int n, k;
    cin >> n >> k;
    vector < pair < ld, ld > > V(n);
    for(auto &[b, a] : V) {
        cin >> a >> b;
        if(b == -1) {
            b = 1e9;
        }
    }
    sort(V.begin(), V.end());
    for(int t = 0; t <= k; ++ t) {
        for(int i = 0; i <= n; ++ i) {
            for(int j = 0; j <= n; ++ j) {
                dp[i][j] = 1e9;
            }
        }
        dp[0][0] = .0;
        for(int i = 0; i < n; ++ i) {
            for(int j = 0; j <= i; ++ j) {
                dp[i + 1][j] = min(dp[i + 1][j], dp[i][j] + (i - j < t ? V[i].first / (i - j + 1) : .0));
                dp[i + 1][j + 1] = min(dp[i + 1][j + 1], dp[i][j] + V[i].second / (t + 1));
            }
        }
        ans = min(ans, dp[n][k - t]);
    }
    cout << fixed << setprecision(9) << ans << '\n';
} 

Compilation message (stderr)

Main.cpp:14:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   14 | main() {
      | ^~~~

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