#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vii;
typedef pair<int,int> pi;
typedef vector<pi> pii;
typedef tuple<int,int,int> tii;
#define REP(i,a,b) for(int i=a;i<b;i++)
#define F first
#define S second
#define PB push_back
#define MP make_pair
#define LSOne(s) ((s)&(-s))
ll INF=1e18+10;
int inf=1e9+10;
ll M=1e9+7;
vector<vector<pair<int,ll>>> a;
void djikistra(vector<ll> &c,int s){
priority_queue<pi,vector<pi>,greater<pi>> pq;
c[s]=0;
pq.push({0,s});
while(!pq.empty()){
ll x=pq.top().F;
int y=pq.top().S;
pq.pop();
if(c[y]<x)continue;
for(auto u:a[y]){
if(c[u.F]<=c[y]+u.S)continue;
c[u.F]=c[y]+u.S;
pq.push({c[u.F],u.F});
}
}
}
int main() {
//ios::sync_with_stdio(0);
//cin.tie(0);
//freopen("test_input.txt", "r", stdin);
//freopen("test_output.txt", "w", stdout);
int n,m;cin>>n>>m;
int s,t;ll l,k;cin>>s>>t>>l>>k;
s--;t--;
a.resize(n);
vector<ll> b(n,INF),c(n,INF);
REP(i,0,m){
int x,y,z;cin>>x>>y>>z;
x--;y--;
a[x].PB({y,z});
a[y].PB({x,z});
}
djikistra(b,s);
djikistra(c,t);
if(b[t]<=k){
cout<<((ll)n*(n-1))/2;
return 0;
}
sort(c.begin(),c.end());
ll ans=0;
REP(i,0,n)ans+=upper_bound(c.begin(),c.end(),k-l-b[i])-c.begin();
cout<<ans;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
2 ms |
604 KB |
Output is correct |
6 |
Correct |
1 ms |
604 KB |
Output is correct |
7 |
Correct |
120 ms |
17372 KB |
Output is correct |
8 |
Correct |
108 ms |
17240 KB |
Output is correct |
9 |
Correct |
103 ms |
17540 KB |
Output is correct |
10 |
Correct |
0 ms |
348 KB |
Output is correct |
11 |
Correct |
0 ms |
348 KB |
Output is correct |
12 |
Correct |
1 ms |
604 KB |
Output is correct |
13 |
Correct |
2 ms |
600 KB |
Output is correct |
14 |
Correct |
70 ms |
13392 KB |
Output is correct |
15 |
Correct |
178 ms |
19164 KB |
Output is correct |
16 |
Correct |
0 ms |
348 KB |
Output is correct |
17 |
Correct |
2 ms |
604 KB |
Output is correct |
18 |
Correct |
120 ms |
17428 KB |
Output is correct |
19 |
Correct |
0 ms |
348 KB |
Output is correct |
20 |
Correct |
0 ms |
348 KB |
Output is correct |
21 |
Correct |
1 ms |
604 KB |
Output is correct |
22 |
Correct |
2 ms |
604 KB |
Output is correct |
23 |
Correct |
67 ms |
13560 KB |
Output is correct |
24 |
Correct |
176 ms |
19128 KB |
Output is correct |
25 |
Correct |
0 ms |
348 KB |
Output is correct |
26 |
Correct |
2 ms |
604 KB |
Output is correct |
27 |
Correct |
132 ms |
21280 KB |
Output is correct |
28 |
Correct |
109 ms |
13988 KB |
Output is correct |
29 |
Correct |
112 ms |
14200 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
344 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
0 ms |
348 KB |
Output is correct |
7 |
Correct |
0 ms |
348 KB |
Output is correct |
8 |
Correct |
0 ms |
348 KB |
Output is correct |
9 |
Correct |
0 ms |
348 KB |
Output is correct |
10 |
Correct |
0 ms |
348 KB |
Output is correct |
11 |
Correct |
0 ms |
348 KB |
Output is correct |
12 |
Correct |
0 ms |
348 KB |
Output is correct |
13 |
Correct |
0 ms |
348 KB |
Output is correct |
14 |
Correct |
0 ms |
348 KB |
Output is correct |
15 |
Correct |
0 ms |
348 KB |
Output is correct |
16 |
Correct |
0 ms |
348 KB |
Output is correct |
17 |
Correct |
0 ms |
348 KB |
Output is correct |
18 |
Correct |
0 ms |
348 KB |
Output is correct |
19 |
Correct |
0 ms |
344 KB |
Output is correct |
20 |
Correct |
0 ms |
348 KB |
Output is correct |
21 |
Correct |
0 ms |
348 KB |
Output is correct |
22 |
Correct |
0 ms |
600 KB |
Output is correct |
23 |
Correct |
0 ms |
348 KB |
Output is correct |
24 |
Correct |
0 ms |
348 KB |
Output is correct |
25 |
Correct |
0 ms |
348 KB |
Output is correct |
26 |
Correct |
0 ms |
348 KB |
Output is correct |
27 |
Correct |
0 ms |
348 KB |
Output is correct |
28 |
Correct |
0 ms |
348 KB |
Output is correct |
29 |
Correct |
0 ms |
348 KB |
Output is correct |
30 |
Correct |
0 ms |
348 KB |
Output is correct |
31 |
Correct |
0 ms |
348 KB |
Output is correct |
32 |
Correct |
0 ms |
348 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
344 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
0 ms |
348 KB |
Output is correct |
7 |
Correct |
0 ms |
348 KB |
Output is correct |
8 |
Correct |
0 ms |
348 KB |
Output is correct |
9 |
Correct |
0 ms |
348 KB |
Output is correct |
10 |
Correct |
0 ms |
348 KB |
Output is correct |
11 |
Correct |
0 ms |
348 KB |
Output is correct |
12 |
Correct |
0 ms |
348 KB |
Output is correct |
13 |
Correct |
0 ms |
348 KB |
Output is correct |
14 |
Correct |
0 ms |
348 KB |
Output is correct |
15 |
Correct |
0 ms |
348 KB |
Output is correct |
16 |
Correct |
0 ms |
348 KB |
Output is correct |
17 |
Correct |
0 ms |
348 KB |
Output is correct |
18 |
Correct |
0 ms |
348 KB |
Output is correct |
19 |
Correct |
0 ms |
344 KB |
Output is correct |
20 |
Correct |
0 ms |
348 KB |
Output is correct |
21 |
Correct |
0 ms |
348 KB |
Output is correct |
22 |
Correct |
0 ms |
600 KB |
Output is correct |
23 |
Correct |
0 ms |
348 KB |
Output is correct |
24 |
Correct |
0 ms |
348 KB |
Output is correct |
25 |
Correct |
0 ms |
348 KB |
Output is correct |
26 |
Correct |
0 ms |
348 KB |
Output is correct |
27 |
Correct |
0 ms |
348 KB |
Output is correct |
28 |
Correct |
0 ms |
348 KB |
Output is correct |
29 |
Correct |
0 ms |
348 KB |
Output is correct |
30 |
Correct |
0 ms |
348 KB |
Output is correct |
31 |
Correct |
0 ms |
348 KB |
Output is correct |
32 |
Correct |
0 ms |
348 KB |
Output is correct |
33 |
Correct |
3 ms |
604 KB |
Output is correct |
34 |
Correct |
1 ms |
604 KB |
Output is correct |
35 |
Correct |
1 ms |
604 KB |
Output is correct |
36 |
Correct |
2 ms |
672 KB |
Output is correct |
37 |
Correct |
2 ms |
600 KB |
Output is correct |
38 |
Correct |
1 ms |
604 KB |
Output is correct |
39 |
Correct |
2 ms |
604 KB |
Output is correct |
40 |
Correct |
2 ms |
604 KB |
Output is correct |
41 |
Correct |
2 ms |
604 KB |
Output is correct |
42 |
Correct |
2 ms |
604 KB |
Output is correct |
43 |
Correct |
3 ms |
604 KB |
Output is correct |
44 |
Correct |
3 ms |
600 KB |
Output is correct |
45 |
Correct |
3 ms |
732 KB |
Output is correct |
46 |
Correct |
3 ms |
604 KB |
Output is correct |
47 |
Correct |
2 ms |
604 KB |
Output is correct |
48 |
Correct |
2 ms |
604 KB |
Output is correct |
49 |
Correct |
2 ms |
604 KB |
Output is correct |
50 |
Correct |
1 ms |
600 KB |
Output is correct |
51 |
Correct |
4 ms |
724 KB |
Output is correct |
52 |
Correct |
3 ms |
604 KB |
Output is correct |
53 |
Correct |
3 ms |
644 KB |
Output is correct |
54 |
Correct |
3 ms |
600 KB |
Output is correct |
55 |
Correct |
2 ms |
604 KB |
Output is correct |
56 |
Correct |
2 ms |
616 KB |
Output is correct |
57 |
Correct |
2 ms |
604 KB |
Output is correct |
58 |
Correct |
2 ms |
604 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
2 ms |
604 KB |
Output is correct |
6 |
Correct |
1 ms |
604 KB |
Output is correct |
7 |
Correct |
120 ms |
17372 KB |
Output is correct |
8 |
Correct |
108 ms |
17240 KB |
Output is correct |
9 |
Correct |
103 ms |
17540 KB |
Output is correct |
10 |
Correct |
0 ms |
348 KB |
Output is correct |
11 |
Correct |
0 ms |
348 KB |
Output is correct |
12 |
Correct |
1 ms |
604 KB |
Output is correct |
13 |
Correct |
2 ms |
600 KB |
Output is correct |
14 |
Correct |
70 ms |
13392 KB |
Output is correct |
15 |
Correct |
178 ms |
19164 KB |
Output is correct |
16 |
Correct |
0 ms |
348 KB |
Output is correct |
17 |
Correct |
2 ms |
604 KB |
Output is correct |
18 |
Correct |
120 ms |
17428 KB |
Output is correct |
19 |
Correct |
0 ms |
348 KB |
Output is correct |
20 |
Correct |
0 ms |
348 KB |
Output is correct |
21 |
Correct |
1 ms |
604 KB |
Output is correct |
22 |
Correct |
2 ms |
604 KB |
Output is correct |
23 |
Correct |
67 ms |
13560 KB |
Output is correct |
24 |
Correct |
176 ms |
19128 KB |
Output is correct |
25 |
Correct |
0 ms |
348 KB |
Output is correct |
26 |
Correct |
2 ms |
604 KB |
Output is correct |
27 |
Correct |
132 ms |
21280 KB |
Output is correct |
28 |
Correct |
109 ms |
13988 KB |
Output is correct |
29 |
Correct |
112 ms |
14200 KB |
Output is correct |
30 |
Correct |
0 ms |
344 KB |
Output is correct |
31 |
Correct |
0 ms |
348 KB |
Output is correct |
32 |
Correct |
0 ms |
348 KB |
Output is correct |
33 |
Correct |
0 ms |
348 KB |
Output is correct |
34 |
Correct |
0 ms |
348 KB |
Output is correct |
35 |
Correct |
0 ms |
348 KB |
Output is correct |
36 |
Correct |
0 ms |
348 KB |
Output is correct |
37 |
Correct |
0 ms |
348 KB |
Output is correct |
38 |
Correct |
0 ms |
348 KB |
Output is correct |
39 |
Correct |
0 ms |
348 KB |
Output is correct |
40 |
Correct |
0 ms |
348 KB |
Output is correct |
41 |
Correct |
0 ms |
348 KB |
Output is correct |
42 |
Correct |
0 ms |
348 KB |
Output is correct |
43 |
Correct |
0 ms |
348 KB |
Output is correct |
44 |
Correct |
0 ms |
348 KB |
Output is correct |
45 |
Correct |
0 ms |
348 KB |
Output is correct |
46 |
Correct |
0 ms |
348 KB |
Output is correct |
47 |
Correct |
0 ms |
348 KB |
Output is correct |
48 |
Correct |
0 ms |
344 KB |
Output is correct |
49 |
Correct |
0 ms |
348 KB |
Output is correct |
50 |
Correct |
0 ms |
348 KB |
Output is correct |
51 |
Correct |
0 ms |
600 KB |
Output is correct |
52 |
Correct |
0 ms |
348 KB |
Output is correct |
53 |
Correct |
0 ms |
348 KB |
Output is correct |
54 |
Correct |
0 ms |
348 KB |
Output is correct |
55 |
Correct |
0 ms |
348 KB |
Output is correct |
56 |
Correct |
0 ms |
348 KB |
Output is correct |
57 |
Correct |
0 ms |
348 KB |
Output is correct |
58 |
Correct |
0 ms |
348 KB |
Output is correct |
59 |
Correct |
0 ms |
348 KB |
Output is correct |
60 |
Correct |
0 ms |
348 KB |
Output is correct |
61 |
Correct |
0 ms |
348 KB |
Output is correct |
62 |
Correct |
3 ms |
604 KB |
Output is correct |
63 |
Correct |
1 ms |
604 KB |
Output is correct |
64 |
Correct |
1 ms |
604 KB |
Output is correct |
65 |
Correct |
2 ms |
672 KB |
Output is correct |
66 |
Correct |
2 ms |
600 KB |
Output is correct |
67 |
Correct |
1 ms |
604 KB |
Output is correct |
68 |
Correct |
2 ms |
604 KB |
Output is correct |
69 |
Correct |
2 ms |
604 KB |
Output is correct |
70 |
Correct |
2 ms |
604 KB |
Output is correct |
71 |
Correct |
2 ms |
604 KB |
Output is correct |
72 |
Correct |
3 ms |
604 KB |
Output is correct |
73 |
Correct |
3 ms |
600 KB |
Output is correct |
74 |
Correct |
3 ms |
732 KB |
Output is correct |
75 |
Correct |
3 ms |
604 KB |
Output is correct |
76 |
Correct |
2 ms |
604 KB |
Output is correct |
77 |
Correct |
2 ms |
604 KB |
Output is correct |
78 |
Correct |
2 ms |
604 KB |
Output is correct |
79 |
Correct |
1 ms |
600 KB |
Output is correct |
80 |
Correct |
4 ms |
724 KB |
Output is correct |
81 |
Correct |
3 ms |
604 KB |
Output is correct |
82 |
Correct |
3 ms |
644 KB |
Output is correct |
83 |
Correct |
3 ms |
600 KB |
Output is correct |
84 |
Correct |
2 ms |
604 KB |
Output is correct |
85 |
Correct |
2 ms |
616 KB |
Output is correct |
86 |
Correct |
2 ms |
604 KB |
Output is correct |
87 |
Correct |
2 ms |
604 KB |
Output is correct |
88 |
Correct |
221 ms |
18920 KB |
Output is correct |
89 |
Correct |
203 ms |
18916 KB |
Output is correct |
90 |
Correct |
191 ms |
19036 KB |
Output is correct |
91 |
Correct |
104 ms |
11088 KB |
Output is correct |
92 |
Correct |
122 ms |
10612 KB |
Output is correct |
93 |
Correct |
80 ms |
13396 KB |
Output is correct |
94 |
Correct |
101 ms |
13648 KB |
Output is correct |
95 |
Correct |
597 ms |
22156 KB |
Output is correct |
96 |
Correct |
656 ms |
21792 KB |
Output is correct |
97 |
Correct |
312 ms |
18628 KB |
Output is correct |
98 |
Correct |
227 ms |
18516 KB |
Output is correct |
99 |
Correct |
152 ms |
17472 KB |
Output is correct |
100 |
Correct |
154 ms |
17436 KB |
Output is correct |
101 |
Correct |
107 ms |
10832 KB |
Output is correct |
102 |
Correct |
105 ms |
10600 KB |
Output is correct |
103 |
Correct |
84 ms |
13392 KB |
Output is correct |
104 |
Correct |
91 ms |
13540 KB |
Output is correct |
105 |
Correct |
726 ms |
22156 KB |
Output is correct |
106 |
Correct |
751 ms |
21988 KB |
Output is correct |
107 |
Correct |
222 ms |
21992 KB |
Output is correct |
108 |
Correct |
239 ms |
21124 KB |
Output is correct |
109 |
Correct |
144 ms |
13876 KB |
Output is correct |
110 |
Correct |
142 ms |
13988 KB |
Output is correct |
111 |
Correct |
151 ms |
14288 KB |
Output is correct |
112 |
Correct |
152 ms |
14436 KB |
Output is correct |