#include <bits/stdc++.h>
typedef long long ll;
#define FOR(i,x,y) for(ll i=x; i<y; i++)
#define FORNEG(i,x,y) for(ll i=x; i>y; i--)
using namespace std;
const ll maxn = 200005;
const ll INF = 10000000000000000;
vector<array<ll, 2>> edges[maxn];
ll dists[maxn];
ll distt[maxn];
int main(){
ios_base::sync_with_stdio(false);
cin.tie(NULL);
FOR(i,0,maxn) dists[i] = INF, distt[i] = INF;
ll n,m;
cin >> n >> m;
ll s, t, l, k;
cin >> s >> t >> l >> k;
FOR(i,0,m){
ll a,b,c;
cin >> a >> b >> c;
edges[a].push_back({b,c});
edges[b].push_back({a,c});
}
priority_queue<vector<ll>> pq;
dists[s] = 0;
pq.push({0, s});
while (pq.size()){
vector<ll> node = pq.top(); pq.pop();
node[0] = -node[0];
if (dists[node[1]] != node[0]) continue;
for (auto&i : edges[node[1]]){
if (dists[i[0]] > dists[node[1]] + i[1]){
dists[i[0]] = dists[node[1]] + i[1];
pq.push({-dists[i[0]] , i[0]});
}
}
}
distt[t] = 0;
pq.push({0, t});
while (pq.size()){
vector<ll> node = pq.top(); pq.pop();
node[0] = -node[0];
if (distt[node[1]] != node[0]) continue;
for (auto&i : edges[node[1]]){
if (distt[i[0]] > distt[node[1]] + i[1]){
distt[i[0]] = distt[node[1]] + i[1];
pq.push({-distt[i[0]] , i[0]});
}
}
}
if (dists[t] <= k) cout << n * (n-1) / 2;
else{
ll ans = 0;
vector<ll> S, T;
FOR(i,1,n+1) S.push_back(dists[i]), T.push_back(distt[i]);
sort(S.begin(), S.end());
sort(T.begin(), T.end());
FOR(i,0,n){
ll req = k - (S[i]+l);
ll sus = upper_bound(T.begin(), T.end(), req) - T.begin();
ans += sus;
}
cout << ans << endl;
}
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
8284 KB |
Output is correct |
2 |
Correct |
1 ms |
8284 KB |
Output is correct |
3 |
Correct |
1 ms |
8284 KB |
Output is correct |
4 |
Correct |
1 ms |
8284 KB |
Output is correct |
5 |
Correct |
2 ms |
8540 KB |
Output is correct |
6 |
Correct |
2 ms |
8540 KB |
Output is correct |
7 |
Correct |
63 ms |
28508 KB |
Output is correct |
8 |
Correct |
86 ms |
27704 KB |
Output is correct |
9 |
Correct |
80 ms |
28720 KB |
Output is correct |
10 |
Correct |
2 ms |
8284 KB |
Output is correct |
11 |
Correct |
1 ms |
8284 KB |
Output is correct |
12 |
Correct |
2 ms |
8284 KB |
Output is correct |
13 |
Correct |
3 ms |
8496 KB |
Output is correct |
14 |
Correct |
34 ms |
18132 KB |
Output is correct |
15 |
Correct |
169 ms |
26172 KB |
Output is correct |
16 |
Correct |
2 ms |
8280 KB |
Output is correct |
17 |
Correct |
2 ms |
8540 KB |
Output is correct |
18 |
Correct |
74 ms |
23896 KB |
Output is correct |
19 |
Correct |
2 ms |
8284 KB |
Output is correct |
20 |
Correct |
2 ms |
8056 KB |
Output is correct |
21 |
Correct |
2 ms |
8284 KB |
Output is correct |
22 |
Correct |
3 ms |
8540 KB |
Output is correct |
23 |
Correct |
33 ms |
18236 KB |
Output is correct |
24 |
Correct |
153 ms |
26056 KB |
Output is correct |
25 |
Correct |
2 ms |
8284 KB |
Output is correct |
26 |
Correct |
2 ms |
8540 KB |
Output is correct |
27 |
Correct |
96 ms |
32588 KB |
Output is correct |
28 |
Correct |
66 ms |
25384 KB |
Output is correct |
29 |
Correct |
56 ms |
22468 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
8028 KB |
Output is correct |
2 |
Correct |
1 ms |
8284 KB |
Output is correct |
3 |
Correct |
1 ms |
8284 KB |
Output is correct |
4 |
Correct |
1 ms |
8284 KB |
Output is correct |
5 |
Correct |
2 ms |
8284 KB |
Output is correct |
6 |
Correct |
1 ms |
8284 KB |
Output is correct |
7 |
Correct |
2 ms |
8284 KB |
Output is correct |
8 |
Correct |
2 ms |
8284 KB |
Output is correct |
9 |
Correct |
1 ms |
8284 KB |
Output is correct |
10 |
Correct |
2 ms |
8284 KB |
Output is correct |
11 |
Correct |
2 ms |
8280 KB |
Output is correct |
12 |
Correct |
2 ms |
8284 KB |
Output is correct |
13 |
Correct |
2 ms |
8280 KB |
Output is correct |
14 |
Correct |
1 ms |
8284 KB |
Output is correct |
15 |
Correct |
2 ms |
8284 KB |
Output is correct |
16 |
Correct |
1 ms |
8284 KB |
Output is correct |
17 |
Correct |
1 ms |
8284 KB |
Output is correct |
18 |
Correct |
2 ms |
8284 KB |
Output is correct |
19 |
Correct |
2 ms |
8284 KB |
Output is correct |
20 |
Correct |
2 ms |
8284 KB |
Output is correct |
21 |
Correct |
1 ms |
8284 KB |
Output is correct |
22 |
Correct |
1 ms |
8284 KB |
Output is correct |
23 |
Correct |
2 ms |
8284 KB |
Output is correct |
24 |
Correct |
2 ms |
8120 KB |
Output is correct |
25 |
Correct |
2 ms |
8284 KB |
Output is correct |
26 |
Correct |
2 ms |
8284 KB |
Output is correct |
27 |
Correct |
1 ms |
8284 KB |
Output is correct |
28 |
Correct |
1 ms |
8284 KB |
Output is correct |
29 |
Correct |
1 ms |
8280 KB |
Output is correct |
30 |
Correct |
1 ms |
8140 KB |
Output is correct |
31 |
Correct |
2 ms |
8284 KB |
Output is correct |
32 |
Correct |
1 ms |
8284 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
8028 KB |
Output is correct |
2 |
Correct |
1 ms |
8284 KB |
Output is correct |
3 |
Correct |
1 ms |
8284 KB |
Output is correct |
4 |
Correct |
1 ms |
8284 KB |
Output is correct |
5 |
Correct |
2 ms |
8284 KB |
Output is correct |
6 |
Correct |
1 ms |
8284 KB |
Output is correct |
7 |
Correct |
2 ms |
8284 KB |
Output is correct |
8 |
Correct |
2 ms |
8284 KB |
Output is correct |
9 |
Correct |
1 ms |
8284 KB |
Output is correct |
10 |
Correct |
2 ms |
8284 KB |
Output is correct |
11 |
Correct |
2 ms |
8280 KB |
Output is correct |
12 |
Correct |
2 ms |
8284 KB |
Output is correct |
13 |
Correct |
2 ms |
8280 KB |
Output is correct |
14 |
Correct |
1 ms |
8284 KB |
Output is correct |
15 |
Correct |
2 ms |
8284 KB |
Output is correct |
16 |
Correct |
1 ms |
8284 KB |
Output is correct |
17 |
Correct |
1 ms |
8284 KB |
Output is correct |
18 |
Correct |
2 ms |
8284 KB |
Output is correct |
19 |
Correct |
2 ms |
8284 KB |
Output is correct |
20 |
Correct |
2 ms |
8284 KB |
Output is correct |
21 |
Correct |
1 ms |
8284 KB |
Output is correct |
22 |
Correct |
1 ms |
8284 KB |
Output is correct |
23 |
Correct |
2 ms |
8284 KB |
Output is correct |
24 |
Correct |
2 ms |
8120 KB |
Output is correct |
25 |
Correct |
2 ms |
8284 KB |
Output is correct |
26 |
Correct |
2 ms |
8284 KB |
Output is correct |
27 |
Correct |
1 ms |
8284 KB |
Output is correct |
28 |
Correct |
1 ms |
8284 KB |
Output is correct |
29 |
Correct |
1 ms |
8280 KB |
Output is correct |
30 |
Correct |
1 ms |
8140 KB |
Output is correct |
31 |
Correct |
2 ms |
8284 KB |
Output is correct |
32 |
Correct |
1 ms |
8284 KB |
Output is correct |
33 |
Correct |
3 ms |
8540 KB |
Output is correct |
34 |
Correct |
2 ms |
8540 KB |
Output is correct |
35 |
Correct |
2 ms |
8296 KB |
Output is correct |
36 |
Correct |
3 ms |
8540 KB |
Output is correct |
37 |
Correct |
2 ms |
8540 KB |
Output is correct |
38 |
Correct |
2 ms |
8284 KB |
Output is correct |
39 |
Correct |
3 ms |
8540 KB |
Output is correct |
40 |
Correct |
3 ms |
8540 KB |
Output is correct |
41 |
Correct |
2 ms |
8540 KB |
Output is correct |
42 |
Correct |
3 ms |
8284 KB |
Output is correct |
43 |
Correct |
3 ms |
8540 KB |
Output is correct |
44 |
Correct |
3 ms |
8540 KB |
Output is correct |
45 |
Correct |
4 ms |
8540 KB |
Output is correct |
46 |
Correct |
3 ms |
8556 KB |
Output is correct |
47 |
Correct |
2 ms |
8540 KB |
Output is correct |
48 |
Correct |
2 ms |
8540 KB |
Output is correct |
49 |
Correct |
3 ms |
8540 KB |
Output is correct |
50 |
Correct |
2 ms |
8284 KB |
Output is correct |
51 |
Correct |
3 ms |
8540 KB |
Output is correct |
52 |
Correct |
3 ms |
8540 KB |
Output is correct |
53 |
Correct |
3 ms |
8540 KB |
Output is correct |
54 |
Correct |
3 ms |
8540 KB |
Output is correct |
55 |
Correct |
3 ms |
8540 KB |
Output is correct |
56 |
Correct |
3 ms |
8540 KB |
Output is correct |
57 |
Correct |
3 ms |
8540 KB |
Output is correct |
58 |
Correct |
3 ms |
8464 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
8284 KB |
Output is correct |
2 |
Correct |
1 ms |
8284 KB |
Output is correct |
3 |
Correct |
1 ms |
8284 KB |
Output is correct |
4 |
Correct |
1 ms |
8284 KB |
Output is correct |
5 |
Correct |
2 ms |
8540 KB |
Output is correct |
6 |
Correct |
2 ms |
8540 KB |
Output is correct |
7 |
Correct |
63 ms |
28508 KB |
Output is correct |
8 |
Correct |
86 ms |
27704 KB |
Output is correct |
9 |
Correct |
80 ms |
28720 KB |
Output is correct |
10 |
Correct |
2 ms |
8284 KB |
Output is correct |
11 |
Correct |
1 ms |
8284 KB |
Output is correct |
12 |
Correct |
2 ms |
8284 KB |
Output is correct |
13 |
Correct |
3 ms |
8496 KB |
Output is correct |
14 |
Correct |
34 ms |
18132 KB |
Output is correct |
15 |
Correct |
169 ms |
26172 KB |
Output is correct |
16 |
Correct |
2 ms |
8280 KB |
Output is correct |
17 |
Correct |
2 ms |
8540 KB |
Output is correct |
18 |
Correct |
74 ms |
23896 KB |
Output is correct |
19 |
Correct |
2 ms |
8284 KB |
Output is correct |
20 |
Correct |
2 ms |
8056 KB |
Output is correct |
21 |
Correct |
2 ms |
8284 KB |
Output is correct |
22 |
Correct |
3 ms |
8540 KB |
Output is correct |
23 |
Correct |
33 ms |
18236 KB |
Output is correct |
24 |
Correct |
153 ms |
26056 KB |
Output is correct |
25 |
Correct |
2 ms |
8284 KB |
Output is correct |
26 |
Correct |
2 ms |
8540 KB |
Output is correct |
27 |
Correct |
96 ms |
32588 KB |
Output is correct |
28 |
Correct |
66 ms |
25384 KB |
Output is correct |
29 |
Correct |
56 ms |
22468 KB |
Output is correct |
30 |
Correct |
2 ms |
8028 KB |
Output is correct |
31 |
Correct |
1 ms |
8284 KB |
Output is correct |
32 |
Correct |
1 ms |
8284 KB |
Output is correct |
33 |
Correct |
1 ms |
8284 KB |
Output is correct |
34 |
Correct |
2 ms |
8284 KB |
Output is correct |
35 |
Correct |
1 ms |
8284 KB |
Output is correct |
36 |
Correct |
2 ms |
8284 KB |
Output is correct |
37 |
Correct |
2 ms |
8284 KB |
Output is correct |
38 |
Correct |
1 ms |
8284 KB |
Output is correct |
39 |
Correct |
2 ms |
8284 KB |
Output is correct |
40 |
Correct |
2 ms |
8280 KB |
Output is correct |
41 |
Correct |
2 ms |
8284 KB |
Output is correct |
42 |
Correct |
2 ms |
8280 KB |
Output is correct |
43 |
Correct |
1 ms |
8284 KB |
Output is correct |
44 |
Correct |
2 ms |
8284 KB |
Output is correct |
45 |
Correct |
1 ms |
8284 KB |
Output is correct |
46 |
Correct |
1 ms |
8284 KB |
Output is correct |
47 |
Correct |
2 ms |
8284 KB |
Output is correct |
48 |
Correct |
2 ms |
8284 KB |
Output is correct |
49 |
Correct |
2 ms |
8284 KB |
Output is correct |
50 |
Correct |
1 ms |
8284 KB |
Output is correct |
51 |
Correct |
1 ms |
8284 KB |
Output is correct |
52 |
Correct |
2 ms |
8284 KB |
Output is correct |
53 |
Correct |
2 ms |
8120 KB |
Output is correct |
54 |
Correct |
2 ms |
8284 KB |
Output is correct |
55 |
Correct |
2 ms |
8284 KB |
Output is correct |
56 |
Correct |
1 ms |
8284 KB |
Output is correct |
57 |
Correct |
1 ms |
8284 KB |
Output is correct |
58 |
Correct |
1 ms |
8280 KB |
Output is correct |
59 |
Correct |
1 ms |
8140 KB |
Output is correct |
60 |
Correct |
2 ms |
8284 KB |
Output is correct |
61 |
Correct |
1 ms |
8284 KB |
Output is correct |
62 |
Correct |
3 ms |
8540 KB |
Output is correct |
63 |
Correct |
2 ms |
8540 KB |
Output is correct |
64 |
Correct |
2 ms |
8296 KB |
Output is correct |
65 |
Correct |
3 ms |
8540 KB |
Output is correct |
66 |
Correct |
2 ms |
8540 KB |
Output is correct |
67 |
Correct |
2 ms |
8284 KB |
Output is correct |
68 |
Correct |
3 ms |
8540 KB |
Output is correct |
69 |
Correct |
3 ms |
8540 KB |
Output is correct |
70 |
Correct |
2 ms |
8540 KB |
Output is correct |
71 |
Correct |
3 ms |
8284 KB |
Output is correct |
72 |
Correct |
3 ms |
8540 KB |
Output is correct |
73 |
Correct |
3 ms |
8540 KB |
Output is correct |
74 |
Correct |
4 ms |
8540 KB |
Output is correct |
75 |
Correct |
3 ms |
8556 KB |
Output is correct |
76 |
Correct |
2 ms |
8540 KB |
Output is correct |
77 |
Correct |
2 ms |
8540 KB |
Output is correct |
78 |
Correct |
3 ms |
8540 KB |
Output is correct |
79 |
Correct |
2 ms |
8284 KB |
Output is correct |
80 |
Correct |
3 ms |
8540 KB |
Output is correct |
81 |
Correct |
3 ms |
8540 KB |
Output is correct |
82 |
Correct |
3 ms |
8540 KB |
Output is correct |
83 |
Correct |
3 ms |
8540 KB |
Output is correct |
84 |
Correct |
3 ms |
8540 KB |
Output is correct |
85 |
Correct |
3 ms |
8540 KB |
Output is correct |
86 |
Correct |
3 ms |
8540 KB |
Output is correct |
87 |
Correct |
3 ms |
8464 KB |
Output is correct |
88 |
Correct |
87 ms |
23800 KB |
Output is correct |
89 |
Correct |
96 ms |
23868 KB |
Output is correct |
90 |
Correct |
84 ms |
26976 KB |
Output is correct |
91 |
Correct |
35 ms |
22108 KB |
Output is correct |
92 |
Correct |
36 ms |
22056 KB |
Output is correct |
93 |
Correct |
37 ms |
18976 KB |
Output is correct |
94 |
Correct |
59 ms |
19116 KB |
Output is correct |
95 |
Correct |
182 ms |
29120 KB |
Output is correct |
96 |
Correct |
148 ms |
25292 KB |
Output is correct |
97 |
Correct |
135 ms |
26304 KB |
Output is correct |
98 |
Correct |
118 ms |
26304 KB |
Output is correct |
99 |
Correct |
64 ms |
25288 KB |
Output is correct |
100 |
Correct |
65 ms |
25280 KB |
Output is correct |
101 |
Correct |
32 ms |
22100 KB |
Output is correct |
102 |
Correct |
33 ms |
22100 KB |
Output is correct |
103 |
Correct |
35 ms |
19064 KB |
Output is correct |
104 |
Correct |
37 ms |
19124 KB |
Output is correct |
105 |
Correct |
172 ms |
29116 KB |
Output is correct |
106 |
Correct |
199 ms |
29120 KB |
Output is correct |
107 |
Correct |
203 ms |
37552 KB |
Output is correct |
108 |
Correct |
215 ms |
38832 KB |
Output is correct |
109 |
Correct |
84 ms |
25908 KB |
Output is correct |
110 |
Correct |
82 ms |
25892 KB |
Output is correct |
111 |
Correct |
110 ms |
24836 KB |
Output is correct |
112 |
Correct |
120 ms |
24992 KB |
Output is correct |