oj.uz

Submission #969402

# Submission time Handle Problem Language Result Execution time Memory
969402 2024-04-25T06:09:24 Z blackslex Cities (BOI16_cities) C++17
0 / 100
 713 ms 35692 KB 
#include<bits/stdc++.h>

using namespace std;
using ll = long long;
using pii = pair<ll, ll>;

int n, m, k, x, y, z;

int main() {
    scanf("%d %d %d", &n, &k, &m);
    vector<int> c(k);
    vector<vector<pii>> v(n + 5, vector<pii>());
    for (auto &e: c) scanf("%d", &e);
    while (m--) scanf("%d %d %d", &x, &y, &z), v[x].emplace_back(y, z), v[y].emplace_back(x, z);
    vector<vector<int>> dp((1 << k) + 5, vector<int>(n + 5, 1e9));
    for (int i = 0; i < k; i++) dp[1 << i][c[i]] = 0;
    for (int i = 1; i < (1 << k); i++) {
        for (int j = i; j; j = (j - 1) & i) {
            for (int r = 1; r <= n; r++) {
                dp[i][r] = min(dp[i][r], dp[j][r] + dp[i ^ j][r]);
            }
        }
        auto dijk = [&] (vector<int> &curd) {
            priority_queue<pii, vector<pii>, greater<pii>> pq;
            for (int j = 1; j <= n; j++) pq.emplace(curd[j], j);
            while (!pq.empty()) {
                auto [nd, nn] = pq.top(); pq.pop();
                for (auto &[tn, td]: v[nn]) if (curd[tn] > curd[nn] + td) pq.emplace(curd[tn] = curd[nn] + td, tn);
            }
        };
        dijk(dp[i]);
    }
    printf("%d", *min_element(dp[(1 << k) - 1].begin(), dp[(1 << k) - 1].end()));
}

Compilation message

cities.cpp: In function 'int main()':
cities.cpp:10:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |     scanf("%d %d %d", &n, &k, &m);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
cities.cpp:13:27: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |     for (auto &e: c) scanf("%d", &e);
      |                      ~~~~~^~~~~~~~~~
cities.cpp:14:22: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |     while (m--) scanf("%d %d %d", &x, &y, &z), v[x].emplace_back(y, z), v[y].emplace_back(x, z);
      |                 ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Incorrect 0 ms 348 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #2
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 248 ms 26232 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 604 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 369 ms 29800 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 26.0

# Verdict Execution time Memory Grader output
1 Incorrect 713 ms 35692 KB Output isn't correct
2 Halted 0 ms 0 KB -