Submission #493775

#	Time	Username	Problem	Language	Result	Execution time	Memory
493775		vulpes	City (BOI06_city)	C++17	90 / 100	1094 ms	25004 KiB

city

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

typedef long long ll;
ll t, c[20002];

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0); cout.tie(0);
    ll n, k; cin >> n >> t >> k;
    for (int i = 0; i < k; i++) {
        cin >> c[i];
    }
    priority_queue<tuple<ll,ll,ll>> q;
    ll r = 0, d = 1, t1, t2, t3, z;
    q.push({-c[0], 4, 0});
    while (n) {
        tie(t1, t2, t3) = q.top(); q.pop();
        z = min(n, t2); n -= z; r -= z * t1;
        if (t3 + 1 < k) {
            q.push({t1 - c[t3 + 1] + c[t3], t2, t3 + 1});
        }
        if (q.empty() || -c[0] - t * d > get<0>(q.top())) {
            q.push({-c[0] - t * d, 4 * d + 4, 0}); d++;
        }
    }
    cout << r << endl;
}

• Subtask 1: 90 / 100