| # | Time | Username | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 1060979 | Halym2007 | Cyberland (APIO23_cyberland) | C++17 | 0 ms | 0 KiB |
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>
//#include "cyberland.h"
using namespace std;
#define ll long long
#define sz size()
#define ff first
#define ss second
#define pb push_back
#define pii pair <ll, ll>
const int N = 2e5 + 5;
vector <pii> v[N];
ll dis[N];
priority_queue <pair <ll, ll>, vector<pair <ll, ll>>, greater <pair <ll, ll>>> q;
ll n, m, k, h, vis[N];
vector <ll> a, tt;
void dfs (ll x) {
vis[x] = 1;
if (a[x] == 0) {
tt.pb (x);
}
for (pii i : v[x]) {
if (vis[i.ff]) continue;
dfs(i.ff);
}
}
double solve(int N, int M, int K, int H, vector<int> x, vector<int> y, vector<int> c, vector<int> arr) {
n = N;m = M;k = K;h = H;
a = arr;
// assert (h != 0);
for (ll i = 0; i < m; ++i) {
v[x[i]].pb ({y[i], c[i]});
v[y[i]].pb ({x[i], c[i]});
}
for (ll i = 0; i < n; ++i) {
dis[i] = 1e16;
}
q.push ({0, h});
dis[h] = 0;
while (!q.empty()) {
ll x = q.top().ss;
q.pop();
for (pii i : v[x]) {
if (dis[i.ff] > dis[x] + i.ss) {
dis[i.ff] = dis[x] + i.ss;
q.push({dis[i.ff], i.ff});
}
}
}
double jogap = 1e16;
jogap = min (jogap, (double)dis[0]);
vis[h] = 1;
dfs (0);
for (ll i : tt) {
jogap = min (jogap, (double)dis[i]);
}
if (jogap == (double)1e16) jogap = -1;
for (ll i = 0; i < n; ++i) {
v[i].clear();
vis[i] = 0;
}
return jogap;
}
//int main() {
// freopen ("input.txt", "r", stdin);
// int T;
// assert(1 == scanf("%d", &T));
// while (T--){
// int N,M,K,H;
// assert(4 == scanf("%d %d %d\n%d", &N, &M, &K, &H));
// std::vector<int> x(M);
// std::vector<int> y(M);
// std::vector<int> c(M);
// std::vector<int> arr(N);
// for (ll i=0;i<N;i++)
// assert(1 == scanf("%d", &arr[i]));
// for (ll i=0;i<M;i++)
// assert(3 == scanf("%d %d %d", &x[i], &y[i], &c[i]));
// prllf("%.12lf\n", solve(N, M, K, H, x, y, c, arr));
// }
//}
/*
1
3 2 30
2
1 2 1
1 2 12
2 0 4
answer : 4.00000000000
1
4 4 30
3
1 0 2 1
0 1 5
0 2 4
1 3 2
2 3 4
answer : 2.00000000000
*/