This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
using namespace std;
const int N = 1e5 + 2;
vector<pair<int, int>>adj[N];
bool vis[N];
int danger[N];
vector<int>tmp;
void init(){
for(auto &x: tmp) vis[x] = 0;
tmp.clear();
}
int main(){
ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
memset(danger, 0x3f, sizeof(danger));
int n, m; cin >> n >> m;
while(m--){
int u, v, w; cin >> u >> v >> w;
adj[u].emplace_back(v, w);
adj[v].emplace_back(u, w);
}
int k; cin >> k;
priority_queue<pair<int, int>, vector<pair<int, int>>, greater<pair<int, int>>>pq;
for(int i = 0; i < k; i++){
int x; cin >> x;
danger[x] = 0;
pq.emplace(0, x);
}
while(!pq.empty()){
auto [d, u] = pq.top(); pq.pop();
for(auto &[v, w]: adj[u]){
if(danger[v] > d + w){
danger[v] = d + w;
pq.emplace(danger[v], v);
}
}
}
int q; cin >> q;
while(q--){
init();
int a, b; cin >> a >> b;
priority_queue<pair<int, int>>pq;
pq.emplace(danger[a], a);
int ans = min(danger[a], danger[b]);
bool found = false;
while(!pq.empty()){
if(found) break;
auto [d, u] = pq.top(); pq.pop();
if(vis[u]) continue;
vis[u] = true;
tmp.push_back(u);
for(auto &[v, w]: adj[u]){
if(!vis[v]){
if(v == b){
ans = min(ans, d);
found = true;
}
pq.emplace(min(d, danger[v]), v);
}
}
}
cout << ans << '\n';
}
return 0;
}
Compilation message (stderr)
plan.cpp: In function 'int main()':
plan.cpp:35:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
35 | auto [d, u] = pq.top(); pq.pop();
| ^
plan.cpp:36:19: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
36 | for(auto &[v, w]: adj[u]){
| ^
plan.cpp:56:18: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
56 | auto [d, u] = pq.top(); pq.pop();
| ^
plan.cpp:61:23: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
61 | for(auto &[v, w]: adj[u]){
| ^
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |