Submission #1287036

#	Time	Username	Problem	Language	Result	Execution time	Memory
1287036		red_souls	Voting Cities (NOI22_votingcity)	C++20	100 / 100	70 ms	6244 KiB

Main

#include <bits/stdc++.h>
#define ll long long
#define task "votingcity"
using namespace std;

const int N = 5016;
const ll INF = 1e18;
int n, e, K, t[N], u, v, q;
ll w, p[N];
vector < pair <int, ll> > adj[N];

namespace sub8 {

    ll d[(1 << 5) + 1][N];
    priority_queue < pair <ll, pair <int, int> >, vector < pair <ll, pair <int, int> > >, greater < pair <ll, pair <int, int> > > > pq;

    void solve() {

        for (int mask = 0; mask < (1 << 5); mask++) {
            for (int i = 0; i < n; i++) {
                d[mask][i] = INF;
            }
        }

        for (int i = 1; i <= K; i++) {
            d[0][t[i]] = 0;
            pq.push({d[0][t[i]], {t[i], 0}});
        }
        while (!pq.empty()) {
            pair <ll, pair <int, int> > top = pq.top();
            pq.pop();
            ll dist = top.first;
            int u = top.second.first;
            int mask = top.second.second;
            if (dist > d[mask][u]) {
                continue;
            }
            for (auto v : adj[u]) {
                int vertex = v.first;
                ll value = v.second;
                if (d[mask][vertex] > dist + value) {
                    d[mask][vertex] = dist + value;
                    pq.push({d[mask][vertex], {vertex, mask}});
                }
                for (int maskBit = ((1 << 5) - 1) ^ mask; maskBit > 0; maskBit ^= maskBit & -maskBit) {
                    int z = __builtin_ctz(maskBit & -maskBit) + 1;
                    int newMask = mask | (1 << (z - 1));
                    ll newVal = value - value / 10 * z;
                    if (d[newMask][vertex] > dist + newVal) {
                        d[newMask][vertex] = dist + newVal;
                        pq.push({d[newMask][vertex], {vertex, newMask}});
                    }
                }
            }
        }

        while (q--) {
            int s;
            cin >> s;
            for (int i = 1; i <= 5; i++) {
                cin >> p[i];
            }

            ll result = INF;
            for (int mask = 0; mask < (1 << 5); mask++) {
                bool flag = true;
                ll cost = 0;
                for (int i = 1; i <= 5; i++) {
                    if (mask >> (i - 1) & 1) {
                        if (p[i] == -1) {
                            flag = false;
                            break;
                        }
                        cost += p[i];
                    }
                }
                if (flag) {
                    result = min(result, d[mask][s] + cost);
                }
            }
            if (result == INF) {
                result = -1;
            }
            cout << result << "\n";
        }
    }
}

int main() {
    ios_base :: sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);

    if (fopen(task".inp", "r")) {
        freopen(task".inp", "r", stdin);
        freopen(task".out", "w", stdout);
    }

    cin >> n >> e >> K;
    for (int i = 1; i <= K; i++) {
        cin >> t[i];
    }
    for (int i = 1; i <= e; i++) {
        cin >> u >> v >> w;
        adj[v].push_back({u, w});
    }
    cin >> q;
    sub8 :: solve();

    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:95:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   95 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:96:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   96 |         freopen(task".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 5 / 5
• Subtask 4: 5 / 5
• Subtask 5: 5 / 5
• Subtask 6: 10 / 10
• Subtask 7: 15 / 15
• Subtask 8: 50 / 50