#include <bits/stdc++.h>
using namespace std;
#define mp make_pair
#define pb push_back
#define len(a) (int)a.size()
#define fi first
#define sc second
#define d1(w) cerr<<#w<<":"<<w<<endl;
#define d2(w,c) cerr<<#w<<":"<<w<<" "<<#c<<":"<<c<<endl;
#define d3(w,c,z) cerr<<#w<<":"<<w<<" "<<#c<<":"<<c<<" "<<#z<<":"<<z<<endl;
#define left ind+ind
#define right ind+ind+1
#define mid (l+r)/2
#define FAST_IO ios_base::sync_with_stdio(false);
#define endl '\n'
typedef long long int ll;
const int maxn = 620;
const long long LINF = 1e18;
const int LOG = 31;
const int INF = 1e9;
const int N = 1e5 + 5;
const int M = 1e4 + 5;
const int SQ = 350;
const int MOD = 998244353;
typedef pair <int,int> pii;
struct node {
int cur;
long long cost;
};
bool operator < (node x,node y) {
return x.cost > y.cost;
}
priority_queue <node> Q;
vector <pair <int,int> > ed[N];
multiset <ll> su,sv;
int n,m,s,t,u,v,vis[N];
long long sp,cu[N],cv[N],ans = LINF;
void dfs(int cur,long long cost) {
vis[cur] = 1;
su.insert(cu[cur]);
sv.insert(cv[cur]);
if (cur == t) {
ans = min(ans,*su.begin() + *sv.begin());
}
for (auto i : ed[cur]) {
if (vis[i.fi] == 0 && cost + i.sc <= sp)
dfs(i.fi,cost + i.sc);
}
vis[cur] = 0;
su.erase(su.find(cu[cur]));
sv.erase(sv.find(cv[cur]));
}
void sp_s(){
Q.push({s,0});
while(len(Q)) {
auto temp = Q.top();
Q.pop();
int cur = temp.cur, cost = temp.cost;
if (vis[cur]) continue;
vis[cur] = 1;
if (cur == t) {
sp = cost;
break;
}
for (auto i : ed[cur]) Q.push({i.fi,cost + i.sc});
}
while(len(Q)) Q.pop();
memset(vis,0,sizeof vis);
}
void sp_u(){
Q.push({u,0});
while(len(Q)) {
auto temp = Q.top();
Q.pop();
int cur = temp.cur, cost = temp.cost;
if (vis[cur]) continue;
vis[cur] = 1;
cu[cur] = cost;
for (auto i : ed[cur]) Q.push({i.fi,cost + i.sc});
}
memset(vis,0,sizeof vis);
while(len(Q)) Q.pop();
}
void sp_v(){
Q.push({v,0});
while(len(Q)) {
auto temp = Q.top();
Q.pop();
int cur = temp.cur, cost = temp.cost;
if (vis[cur]) continue;
vis[cur] = 1;
cv[cur] = cost;
for (auto i : ed[cur]) Q.push({i.fi,cost + i.sc});
}
memset(vis,0,sizeof vis);
while(len(Q)) Q.pop();
}
int main() {
scanf("%d %d %d %d %d %d",&n,&m,&s,&t,&u,&v);
for (int i = 1 ; i <= m ; i++) {
int u,v,c;
scanf("%d %d %d",&u,&v,&c);
ed[u].pb(mp(v,c));
ed[v].pb(mp(u,c));
}
sp_s();
sp_u();
sp_v();
//dfs(s,0);
printf("%lld\n",ans);
}
Compilation message
commuter_pass.cpp: In function 'int main()':
commuter_pass.cpp:115:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d %d %d %d %d %d",&n,&m,&s,&t,&u,&v);
~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
commuter_pass.cpp:118:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d %d %d",&u,&v,&c);
~~~~~^~~~~~~~~~~~~~~~~~~~~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
780 ms |
13660 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
741 ms |
14492 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
45 ms |
14492 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
780 ms |
13660 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |