#include <bits/stdc++.h>
/* #include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp> */
using namespace std;
// using namespace __gnu_pbds;
using ll = long long;
using ull = unsigned ll;
template<typename T> using vt = vector<T>;
using vi = vt<int>;
using vvi = vt<vi>;
using ii = pair<int, int>;
using vii = vt<ii>;
/* template<typename T>
using indexed_set = tree<T,null_type,less<T>,rb_tree_tag,tree_order_statistics_node_update>; */
/* struct chash {
static ull hash_f(ull x) {x += 0x9e3779b97f4a7c15; x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9; x = (x ^ (x >> 27)) * 0x94d049bb133111eb; return x ^ (x >> 31);}
size_t operator()(ull x) const {static const ull RANDOM = chrono::steady_clock::now().time_since_epoch().count();return hash_f(x + RANDOM);}
};
struct iihash {
template <class T1, class T2>
size_t operator () (const pair<T1,T2> &p) const {auto h1 = hash<T1>{}(p.first);auto h2 = hash<T2>{}(p.second);return h1 ^ h2;}
};
template<class T1, class T2, class T3> using ii_umap = gp_hash_table<pair<T1,T2>,T3,iihash>;
template<class T1, class T2> using f_umap = gp_hash_table<T1,T2,chash>;
template<class T1, class T2> using o_umap = gp_hash_table<T1,T2>; */
#define sqr(x) (x)*(x)
#define all(x) begin(x), end(x)
#define rall(x) (x).rbegin(), (x).rend()
#define sz(x) (int)(x).size()
#define debug(x) cerr << #x << " -> " << x << '\n'
#define F first
#define S second
#define mp make_pair
#define pb push_back
#define eb emplace_back
const int inf = 1e9 + 7;
const ll infll = 1e18 + 10;
template <typename T> inline T fgcd(T a, T b) {while(b) swap(b, a %= b); return a;}
ll fpow(ll a, ll b) {ll o = 1; for(;b;b >>= 1) {if(b & 1) o = o * a;a = a * a;} return o;}
ll fpow(ll a, ll b, ll m) {ll o = 1; a %= m; for(;b;b >>= 1) {if(b & 1) o = o * a % m;a = a * a % m;} return o;}
template<class T> void uniq(vt<T> &a) {sort(all(a));a.resize(unique(all(a)) - a.begin());}
void setIO(string name = "", string inp = "inp", string out = "out") {
cin.tie(0)->sync_with_stdio(0);
if(sz(name)) {
if(sz(inp)) freopen((name+"."+inp).c_str(), "r", stdin);
if(sz(out)) freopen((name+"."+out).c_str(), "w", stdout);
}
}
int n,m,k,x,y,z;
using pll = pair<ll, ll>;
int main() {
setIO();
cin >> n >> m >> k;
vt<vii> a(n);
while(m--) {
cin >> x >> y >> z;
a[x].eb(z,y);
a[y].eb(z,x);
}
vt<pll> d(n, {infll, infll});
priority_queue<pll, vt<pll>, greater<pll>> pq;
while(k--) {
cin >> x;
d[x] = {0,0};
pq.push({0, x});
}
while(!pq.empty()) {
ll du = pq.top().F, u = pq.top().S;
pq.pop();
if(du != d[u].S) continue;
for(ii v : a[u]) {
if(d[v.S].F > du + v.F) {
d[v.S].S = d[v.S].F;
d[v.S].F = du + v.F;
if(d[v.S].S != infll) pq.push({d[v.S].S, v.S});
}
else if(d[v.S].S > du + v.F) pq.push({d[v.S].S = du + v.F, v.S});
}
}
cout << d[0].S;
return 0;
}
Compilation message
crocodile.cpp: In function 'void setIO(std::string, std::string, std::string)':
crocodile.cpp:45:28: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
45 | if(sz(inp)) freopen((name+"."+inp).c_str(), "r", stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
crocodile.cpp:46:28: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
46 | if(sz(out)) freopen((name+"."+out).c_str(), "w", stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/bin/ld: /tmp/cc56tKe1.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccuZWv21.o:crocodile.cpp:(.text.startup+0x0): first defined here
/usr/bin/ld: /tmp/cc56tKe1.o: in function `main':
grader.cpp:(.text.startup+0x36): undefined reference to `travel_plan(int, int, int (*) [2], int*, int, int*)'
collect2: error: ld returned 1 exit status
