#include <iostream>
#include <bits/stdc++.h>
using namespace std;
long long k;vector<pair<int,int>> adj[100001],rev[1000001];
long long an[100001];
map<pair<int,int>,long long> mp;
void dc(int l,int r,vector<pair<pair<int,int>,int>> qu){
if(l>=r)return;
int md = (l+r)/2;
long long ll[k][(int)k*(md-l+1)],rr[k][(k*(r-md))];
for(int j = md;j>=l;j--){
for(int z = 0;z<k;z++){
for(int a = 0;a<k;a++){
if(j==md){
if(z==a){
ll[a][((md+1)*k-1)-(j*k+z)] = 0;
}
else ll[a][((md+1)*k-1)-(j*k+z)] = 1e9;
continue;
}
ll[a][((md+1)*k-1)-(j*k+z)] = 1e9;
for(auto e:adj[j*k+z]){
ll[a][((md+1)*k-1)-(j*k+z)] = min(ll[a][((md+1)*k-1)-(j*k+z)],ll[a][((md+1)*k-1)-e.first]+e.second);
}
}
}
}
for(int j = md+1;j<=r;j++){
for(int z = 0;z<k;z++){
for(int a = 0;a<k;a++){
if(j==md+1){
if(z==a)rr[a][(j*k+z)-((md+1)*k)] = 0;
else rr[a][(j*k+z)-((md+1)*k)] = 1e9;
continue;
}
rr[a][(j*k+z)-((md+1)*k)] = 1e9;
for(auto e:rev[j*k+z]){
rr[a][(j*k+z)-((md+1)*k)] = min(rr[a][(j*k+z)-((md+1)*k)],rr[a][e.first-((md+1)*k)]+e.second);
}
}
}
}
vector<pair<pair<int,int>,int>> R,L;
for(auto i:qu){
if(i.first.first/k>md){
R.push_back(i);
}else if(i.first.second/k<md){
L.push_back(i);
}else{
if((i.first.second/k)==md){
an[i.second] = ll[i.first.second%k][((md+1)*k-1)-i.first.first];
}else{
long long ans = 1e18;
for(int z = 0;z<k;z++){
for(int e = 0;e<k;e++){
ans = min(ans,ll[z][((md+1)*k-1)-i.first.first]+rr[e][i.first.second-((md+1)*k)]+(mp.count(make_pair((md*k)+z,(md+1)*k+e))==0?1000000000:mp[{(md*k)+z,(md+1)*k+e}]));
}
}
an[i.second] = ans;
}
}
}
dc(l,md-1,L);dc(md+1,r,R);
}
int main(){
memset(an,-1,sizeof an);
int n,m,o;
cin>>k>>n>>m>>o;
for(int i = 0;i<m;i++){
long long a,b,c;
cin>>a>>b>>c;
mp[{a,b}] = c;
adj[a].push_back({b,c});
rev[b].push_back({a,c});
}
vector<pair<pair<int,int>,int>> qu;
for(int i = 0;i<o;i++){
long long a,b;cin>>a>>b;
if(a==b){
an[i] = 0;continue;
}
qu.push_back({{a,b},i});
}
dc(0,(n-1)/k,qu);
for(int i = 0;i<o;i++){
cout<<(an[i]>=1e9?-1:an[i])<<endl;
}
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
99 ms |
35392 KB |
Output is correct |
2 |
Correct |
7 ms |
26972 KB |
Output is correct |
3 |
Correct |
7 ms |
26972 KB |
Output is correct |
4 |
Correct |
8 ms |
26968 KB |
Output is correct |
5 |
Correct |
9 ms |
27228 KB |
Output is correct |
6 |
Correct |
8 ms |
27228 KB |
Output is correct |
7 |
Correct |
9 ms |
27224 KB |
Output is correct |
8 |
Correct |
90 ms |
35204 KB |
Output is correct |
9 |
Correct |
99 ms |
35052 KB |
Output is correct |
10 |
Correct |
31 ms |
28352 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
183 ms |
39776 KB |
Output is correct |
2 |
Correct |
7 ms |
27052 KB |
Output is correct |
3 |
Correct |
7 ms |
26972 KB |
Output is correct |
4 |
Correct |
7 ms |
26972 KB |
Output is correct |
5 |
Correct |
7 ms |
26852 KB |
Output is correct |
6 |
Correct |
7 ms |
26972 KB |
Output is correct |
7 |
Correct |
24 ms |
27704 KB |
Output is correct |
8 |
Correct |
26 ms |
27648 KB |
Output is correct |
9 |
Correct |
90 ms |
35456 KB |
Output is correct |
10 |
Correct |
228 ms |
45856 KB |
Output is correct |
11 |
Correct |
166 ms |
40188 KB |
Output is correct |
12 |
Correct |
157 ms |
38756 KB |
Output is correct |
13 |
Correct |
234 ms |
47712 KB |
Output is correct |
14 |
Correct |
155 ms |
38876 KB |
Output is correct |
15 |
Correct |
102 ms |
38088 KB |
Output is correct |
16 |
Correct |
103 ms |
37972 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
7 ms |
27048 KB |
Output is correct |
2 |
Correct |
7 ms |
27224 KB |
Output is correct |
3 |
Correct |
7 ms |
27228 KB |
Output is correct |
4 |
Correct |
8 ms |
26972 KB |
Output is correct |
5 |
Correct |
6 ms |
26972 KB |
Output is correct |
6 |
Correct |
7 ms |
27064 KB |
Output is correct |
7 |
Correct |
8 ms |
27124 KB |
Output is correct |
8 |
Correct |
11 ms |
27484 KB |
Output is correct |
9 |
Correct |
11 ms |
27484 KB |
Output is correct |
10 |
Correct |
76 ms |
34640 KB |
Output is correct |
11 |
Correct |
117 ms |
38996 KB |
Output is correct |
12 |
Correct |
216 ms |
45024 KB |
Output is correct |
13 |
Correct |
263 ms |
46704 KB |
Output is correct |
14 |
Correct |
149 ms |
42320 KB |
Output is correct |
15 |
Correct |
94 ms |
37712 KB |
Output is correct |
16 |
Correct |
93 ms |
37736 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
7 ms |
27048 KB |
Output is correct |
2 |
Correct |
7 ms |
27224 KB |
Output is correct |
3 |
Correct |
7 ms |
27228 KB |
Output is correct |
4 |
Correct |
8 ms |
26972 KB |
Output is correct |
5 |
Correct |
6 ms |
26972 KB |
Output is correct |
6 |
Correct |
7 ms |
27064 KB |
Output is correct |
7 |
Correct |
8 ms |
27124 KB |
Output is correct |
8 |
Correct |
11 ms |
27484 KB |
Output is correct |
9 |
Correct |
11 ms |
27484 KB |
Output is correct |
10 |
Correct |
76 ms |
34640 KB |
Output is correct |
11 |
Correct |
117 ms |
38996 KB |
Output is correct |
12 |
Correct |
216 ms |
45024 KB |
Output is correct |
13 |
Correct |
263 ms |
46704 KB |
Output is correct |
14 |
Correct |
149 ms |
42320 KB |
Output is correct |
15 |
Correct |
94 ms |
37712 KB |
Output is correct |
16 |
Correct |
93 ms |
37736 KB |
Output is correct |
17 |
Correct |
125 ms |
39264 KB |
Output is correct |
18 |
Correct |
6 ms |
26972 KB |
Output is correct |
19 |
Correct |
6 ms |
26968 KB |
Output is correct |
20 |
Correct |
6 ms |
26972 KB |
Output is correct |
21 |
Correct |
6 ms |
26972 KB |
Output is correct |
22 |
Correct |
6 ms |
27048 KB |
Output is correct |
23 |
Correct |
15 ms |
27284 KB |
Output is correct |
24 |
Correct |
15 ms |
27316 KB |
Output is correct |
25 |
Correct |
19 ms |
27484 KB |
Output is correct |
26 |
Correct |
15 ms |
27736 KB |
Output is correct |
27 |
Correct |
66 ms |
34900 KB |
Output is correct |
28 |
Correct |
200 ms |
45588 KB |
Output is correct |
29 |
Correct |
238 ms |
46932 KB |
Output is correct |
30 |
Correct |
157 ms |
42580 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
99 ms |
35392 KB |
Output is correct |
2 |
Correct |
7 ms |
26972 KB |
Output is correct |
3 |
Correct |
7 ms |
26972 KB |
Output is correct |
4 |
Correct |
8 ms |
26968 KB |
Output is correct |
5 |
Correct |
9 ms |
27228 KB |
Output is correct |
6 |
Correct |
8 ms |
27228 KB |
Output is correct |
7 |
Correct |
9 ms |
27224 KB |
Output is correct |
8 |
Correct |
90 ms |
35204 KB |
Output is correct |
9 |
Correct |
99 ms |
35052 KB |
Output is correct |
10 |
Correct |
31 ms |
28352 KB |
Output is correct |
11 |
Correct |
183 ms |
39776 KB |
Output is correct |
12 |
Correct |
7 ms |
27052 KB |
Output is correct |
13 |
Correct |
7 ms |
26972 KB |
Output is correct |
14 |
Correct |
7 ms |
26972 KB |
Output is correct |
15 |
Correct |
7 ms |
26852 KB |
Output is correct |
16 |
Correct |
7 ms |
26972 KB |
Output is correct |
17 |
Correct |
24 ms |
27704 KB |
Output is correct |
18 |
Correct |
26 ms |
27648 KB |
Output is correct |
19 |
Correct |
90 ms |
35456 KB |
Output is correct |
20 |
Correct |
228 ms |
45856 KB |
Output is correct |
21 |
Correct |
166 ms |
40188 KB |
Output is correct |
22 |
Correct |
157 ms |
38756 KB |
Output is correct |
23 |
Correct |
234 ms |
47712 KB |
Output is correct |
24 |
Correct |
155 ms |
38876 KB |
Output is correct |
25 |
Correct |
102 ms |
38088 KB |
Output is correct |
26 |
Correct |
103 ms |
37972 KB |
Output is correct |
27 |
Correct |
7 ms |
27048 KB |
Output is correct |
28 |
Correct |
7 ms |
27224 KB |
Output is correct |
29 |
Correct |
7 ms |
27228 KB |
Output is correct |
30 |
Correct |
8 ms |
26972 KB |
Output is correct |
31 |
Correct |
6 ms |
26972 KB |
Output is correct |
32 |
Correct |
7 ms |
27064 KB |
Output is correct |
33 |
Correct |
8 ms |
27124 KB |
Output is correct |
34 |
Correct |
11 ms |
27484 KB |
Output is correct |
35 |
Correct |
11 ms |
27484 KB |
Output is correct |
36 |
Correct |
76 ms |
34640 KB |
Output is correct |
37 |
Correct |
117 ms |
38996 KB |
Output is correct |
38 |
Correct |
216 ms |
45024 KB |
Output is correct |
39 |
Correct |
263 ms |
46704 KB |
Output is correct |
40 |
Correct |
149 ms |
42320 KB |
Output is correct |
41 |
Correct |
94 ms |
37712 KB |
Output is correct |
42 |
Correct |
93 ms |
37736 KB |
Output is correct |
43 |
Correct |
125 ms |
39264 KB |
Output is correct |
44 |
Correct |
6 ms |
26972 KB |
Output is correct |
45 |
Correct |
6 ms |
26968 KB |
Output is correct |
46 |
Correct |
6 ms |
26972 KB |
Output is correct |
47 |
Correct |
6 ms |
26972 KB |
Output is correct |
48 |
Correct |
6 ms |
27048 KB |
Output is correct |
49 |
Correct |
15 ms |
27284 KB |
Output is correct |
50 |
Correct |
15 ms |
27316 KB |
Output is correct |
51 |
Correct |
19 ms |
27484 KB |
Output is correct |
52 |
Correct |
15 ms |
27736 KB |
Output is correct |
53 |
Correct |
66 ms |
34900 KB |
Output is correct |
54 |
Correct |
200 ms |
45588 KB |
Output is correct |
55 |
Correct |
238 ms |
46932 KB |
Output is correct |
56 |
Correct |
157 ms |
42580 KB |
Output is correct |
57 |
Correct |
342 ms |
51732 KB |
Output is correct |
58 |
Correct |
80 ms |
35348 KB |
Output is correct |
59 |
Correct |
140 ms |
40184 KB |
Output is correct |