Submission #917785

#	Time	Username	Problem	Language	Result	Execution time	Memory
917785		VMaksimoski008	Toll (BOI17_toll)	C++14	10 / 100	41 ms	6740 KiB

toll

#include <bits/stdc++.h>

#define pb push_back
#define eb emplace_back
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define uniq(x) x.erase(unique(all(x)), x.end())
#define rall(x) x.rbegin(), x.rend()
//#define int long long

using namespace std;

using ll = long long;
using ull = unsigned long long;
using ld = long double;
using pii = pair<int, int>;
using pll = pair<ll, ll>;

const int mod = 1e9 + 7;
const int LOG = 20;
const int maxn = 1e5 + 5;
const double eps = 1e-9;

void setIO() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
}

int k, m, n, o;
vector<vector<pii> > graph;

int32_t main() {
    setIO();

    cin >> k >> n >> m >> o;
    graph.resize(n);

    for(int i=0; i<m; i++) {
        int a, b, w;
        cin >> a >> b >> w;
        graph[a].push_back({ b, w });
    }

    vector<ll> dist(n, 1e18);
    vector<bool> vis(n, 0);
    priority_queue<pll, vector<pll>, greater<pll> > pq;
    pq.push({ 0, 0 });
    dist[0] = 0;

    while(!pq.empty()) {
        int u = pq.top().second;
        pq.pop();

        if(vis[u]) continue;
        vis[u] = 1;

        for(auto &[v, w] : graph[u]) {
            if(dist[v] > dist[u] + w) {
                dist[v] = dist[u] + w;
                pq.push({ dist[v], v });
            }
        }
    }

    while(o--) {
        int a, b;
        cin >> a >> b;
        cout << (vis[b] ? dist[b] : -1) << '\n';
    }

    return 0;
}

Compilation message (stderr)

toll.cpp: In function 'int32_t main()':
toll.cpp:58:19: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   58 |         for(auto &[v, w] : graph[u]) {
      |                   ^

• Subtask 1: 0 / 7
• Subtask 2: 10 / 10
• Subtask 3: 0 / 8
• Subtask 4: 0 / 31
• Subtask 5: 0 / 44