oj.uz

Submission #893220

# Submission time Handle Problem Language Result Execution time Memory
893220 2023-12-26T18:11:14 Z eysbutno Crocodile's Underground City (IOI11_crocodile) C++11
100 / 100
 353 ms 66112 KB 
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
#define all(x) begin(x), end(x)
#define sz(x) (int) (x).size()
#define smin(a, b) a = min(a, b)
#define smax(a, b) a = max(a, b)
#define pb push_back
#define ins insert
#define f first 
#define s second 

int travel_plan(int N, int M, int R[][2], 
    int L[], int k, int p[]) {
    const ll INF = 1e18;
    int n = N, m = M;
    vector<vector<pii>> adj(n);
    for (int i = 0; i < m; i++) {
        int x = R[i][0], y = R[i][1],
            w = L[i];
        adj[x].pb({y, w});
        adj[y].pb({x, w});
    }
    vector<vector<ll>> dist(2, 
        vector<ll>(n, INF));
    priority_queue<pll> pq;
    for (int i = 0; i < k; i++) {
        pq.push({0, p[i]});
        dist[0][p[i]] = 0;
        dist[1][p[i]] = 0;
    }
    while (!pq.empty()) {
        auto N = pq.top(); pq.pop();
        ll u = N.s, t = -N.f;
        if (dist[1][u] != t) {
            continue;
        }
        /**
         * Propogate every time there
         * is a new best second best
         * for a node.
        */
        for (auto [v, w] : adj[u]) {
            if (t + w < dist[0][v]) {
                if (dist[0][v] != dist[1][v]) {
                    pq.push({-dist[0][v], v});
                }
                swap(dist[0][v], dist[1][v]);
                dist[0][v] = t + w;
            } else if (t + w < dist[1][v]) {
                dist[1][v] = t + w;
                pq.push({-dist[1][v], v});
            }
        }
    }
    return (int) dist[1][0];
}

Compilation message

crocodile.cpp: In function 'int travel_plan(int, int, int (*)[2], int*, int, int*)':
crocodile.cpp:45:19: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   45 |         for (auto [v, w] : adj[u]) {
      |                   ^

Subtask #1
46.0 / 46.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4444 KB Output is correct
2 Correct 1 ms 4540 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 1 ms 4560 KB Output is correct
8 Correct 1 ms 4444 KB Output is correct

Subtask #2
43.0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4444 KB Output is correct
2 Correct 1 ms 4540 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 1 ms 4560 KB Output is correct
8 Correct 1 ms 4444 KB Output is correct
9 Correct 2 ms 4696 KB Output is correct
10 Correct 1 ms 4440 KB Output is correct
11 Correct 1 ms 4444 KB Output is correct
12 Correct 3 ms 4700 KB Output is correct
13 Correct 3 ms 4896 KB Output is correct
14 Correct 1 ms 4444 KB Output is correct
15 Correct 2 ms 4580 KB Output is correct

Subtask #3
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4444 KB Output is correct
2 Correct 1 ms 4540 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 1 ms 4560 KB Output is correct
8 Correct 1 ms 4444 KB Output is correct
9 Correct 2 ms 4696 KB Output is correct
10 Correct 1 ms 4440 KB Output is correct
11 Correct 1 ms 4444 KB Output is correct
12 Correct 3 ms 4700 KB Output is correct
13 Correct 3 ms 4896 KB Output is correct
14 Correct 1 ms 4444 KB Output is correct
15 Correct 2 ms 4580 KB Output is correct
16 Correct 297 ms 57692 KB Output is correct
17 Correct 52 ms 16984 KB Output is correct
18 Correct 63 ms 18512 KB Output is correct
19 Correct 353 ms 66112 KB Output is correct
20 Correct 243 ms 47900 KB Output is correct
21 Correct 27 ms 9564 KB Output is correct
22 Correct 230 ms 46516 KB Output is correct