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Submission #535847

# Submission time Handle Problem Language Result Execution time Memory
535847 2022-03-11T14:19:22 Z new_acc Toll (BOI17_toll) C++14
100 / 100
 264 ms 19268 KB 
#include<bits/stdc++.h>
#define fi first
#define se second
using namespace std;
typedef long long ll;
typedef vector<int> vi;
typedef vector<ll> vl;
const int N=1e5+10;
vi zap[N],war[N];
int z[N];
vector<pair<int,int> >graf[2][N];
int odl[2][N],n,m,ans[N];
void bfs(int p,bool xd,int w,int kon){
	vector<int> curr;
	curr.push_back(p);
	odl[xd][p]=0;
	while(curr.size() and w!=kon){
		vi nxt;
		for(auto v:curr){
			for(auto [u,c]:graf[xd][v]){
				if(odl[xd][u]==-1) odl[xd][u]=odl[xd][v]+c,nxt.push_back(u);
				else odl[xd][u]=min(odl[xd][u],odl[xd][v]+c);
			}
		} 
		if(xd) w--;
		else w++;
		curr=nxt;
	}
}
void dc(int p=0,int k=n/m){
	if(p==k) return;
	int sr=(p+k)>>1;
	for(auto curr:war[sr]){
		for(int i=p;i<=k;i++)
			for(auto xd:war[i]) odl[1][xd]=-1,odl[0][xd]=-1;
		bfs(curr,0,sr,k);
		bfs(curr,1,sr,p);
		for(int i=p;i<=sr;i++){
			for(auto xd:war[i]){
				for(auto u:zap[xd])
					if(z[u]/m>sr and z[u]/m<=k and odl[1][xd]!=-1 and odl[0][z[u]]!=-1) ans[u]=min(ans[u],odl[1][xd]+odl[0][z[u]]);
			}
		}
	}
	dc(p,sr),dc(sr+1,k);
}
void solve(){
	int kr,q;
	cin>>m>>n>>kr>>q;
	for(int i=1;i<=kr;i++){
		int a,b,c;
		cin>>a>>b>>c;
		graf[0][a].push_back({b,c}),graf[1][b].push_back({a,c});
	}
	for(int i=0;i<n;i++) war[i/m].push_back(i);
	for(int i=1;i<=q;i++){
		int a,b;
		cin>>a>>b;
		ans[i]=INT_MAX;
		z[i]=b,zap[a].push_back(i);
	}	
	for(int i=1;i<=n;i++) odl[0][i]=-1;
	dc();
	for(int i=1;i<=q;i++) cout<<(ans[i]==INT_MAX?-1:ans[i])<<"\n";
}
int main(){
	ios_base::sync_with_stdio(0),cin.tie(0);
	solve();
}

Compilation message

toll.cpp: In function 'void bfs(int, bool, int, int)':
toll.cpp:20:13: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   20 |    for(auto [u,c]:graf[xd][v]){
      |             ^

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 83 ms 15156 KB Output is correct
2 Correct 5 ms 9684 KB Output is correct
3 Correct 5 ms 9684 KB Output is correct
4 Correct 5 ms 9648 KB Output is correct
5 Correct 8 ms 9812 KB Output is correct
6 Correct 7 ms 9812 KB Output is correct
7 Correct 7 ms 9812 KB Output is correct
8 Correct 73 ms 16100 KB Output is correct
9 Correct 52 ms 15824 KB Output is correct
10 Correct 22 ms 12172 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 134 ms 14152 KB Output is correct
2 Correct 6 ms 9740 KB Output is correct
3 Correct 5 ms 9700 KB Output is correct
4 Correct 5 ms 9684 KB Output is correct
5 Correct 5 ms 9732 KB Output is correct
6 Correct 5 ms 9732 KB Output is correct
7 Correct 9 ms 10068 KB Output is correct
8 Correct 12 ms 10184 KB Output is correct
9 Correct 68 ms 15868 KB Output is correct
10 Correct 202 ms 17540 KB Output is correct
11 Correct 130 ms 15896 KB Output is correct
12 Correct 87 ms 15040 KB Output is correct
13 Correct 178 ms 17696 KB Output is correct
14 Correct 118 ms 14796 KB Output is correct
15 Correct 127 ms 14100 KB Output is correct
16 Correct 124 ms 14092 KB Output is correct

Subtask #3
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9684 KB Output is correct
2 Correct 5 ms 9732 KB Output is correct
3 Correct 5 ms 9684 KB Output is correct
4 Correct 5 ms 9728 KB Output is correct
5 Correct 5 ms 9684 KB Output is correct
6 Correct 6 ms 9812 KB Output is correct
7 Correct 7 ms 9844 KB Output is correct
8 Correct 9 ms 9996 KB Output is correct
9 Correct 8 ms 9940 KB Output is correct
10 Correct 66 ms 15596 KB Output is correct
11 Correct 124 ms 15552 KB Output is correct
12 Correct 188 ms 17284 KB Output is correct
13 Correct 210 ms 18124 KB Output is correct
14 Correct 172 ms 16164 KB Output is correct
15 Correct 127 ms 13968 KB Output is correct
16 Correct 130 ms 14016 KB Output is correct

Subtask #4
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9684 KB Output is correct
2 Correct 5 ms 9732 KB Output is correct
3 Correct 5 ms 9684 KB Output is correct
4 Correct 5 ms 9728 KB Output is correct
5 Correct 5 ms 9684 KB Output is correct
6 Correct 6 ms 9812 KB Output is correct
7 Correct 7 ms 9844 KB Output is correct
8 Correct 9 ms 9996 KB Output is correct
9 Correct 8 ms 9940 KB Output is correct
10 Correct 66 ms 15596 KB Output is correct
11 Correct 124 ms 15552 KB Output is correct
12 Correct 188 ms 17284 KB Output is correct
13 Correct 210 ms 18124 KB Output is correct
14 Correct 172 ms 16164 KB Output is correct
15 Correct 127 ms 13968 KB Output is correct
16 Correct 130 ms 14016 KB Output is correct
17 Correct 125 ms 15736 KB Output is correct
18 Correct 5 ms 9684 KB Output is correct
19 Correct 5 ms 9684 KB Output is correct
20 Correct 6 ms 9684 KB Output is correct
21 Correct 5 ms 9684 KB Output is correct
22 Correct 7 ms 9640 KB Output is correct
23 Correct 7 ms 9940 KB Output is correct
24 Correct 8 ms 9940 KB Output is correct
25 Correct 10 ms 10000 KB Output is correct
26 Correct 9 ms 9940 KB Output is correct
27 Correct 63 ms 15820 KB Output is correct
28 Correct 202 ms 17448 KB Output is correct
29 Correct 201 ms 18196 KB Output is correct
30 Correct 173 ms 16300 KB Output is correct

Subtask #5
44.0 / 44.0

# Verdict Execution time Memory Grader output
1 Correct 83 ms 15156 KB Output is correct
2 Correct 5 ms 9684 KB Output is correct
3 Correct 5 ms 9684 KB Output is correct
4 Correct 5 ms 9648 KB Output is correct
5 Correct 8 ms 9812 KB Output is correct
6 Correct 7 ms 9812 KB Output is correct
7 Correct 7 ms 9812 KB Output is correct
8 Correct 73 ms 16100 KB Output is correct
9 Correct 52 ms 15824 KB Output is correct
10 Correct 22 ms 12172 KB Output is correct
11 Correct 134 ms 14152 KB Output is correct
12 Correct 6 ms 9740 KB Output is correct
13 Correct 5 ms 9700 KB Output is correct
14 Correct 5 ms 9684 KB Output is correct
15 Correct 5 ms 9732 KB Output is correct
16 Correct 5 ms 9732 KB Output is correct
17 Correct 9 ms 10068 KB Output is correct
18 Correct 12 ms 10184 KB Output is correct
19 Correct 68 ms 15868 KB Output is correct
20 Correct 202 ms 17540 KB Output is correct
21 Correct 130 ms 15896 KB Output is correct
22 Correct 87 ms 15040 KB Output is correct
23 Correct 178 ms 17696 KB Output is correct
24 Correct 118 ms 14796 KB Output is correct
25 Correct 127 ms 14100 KB Output is correct
26 Correct 124 ms 14092 KB Output is correct
27 Correct 5 ms 9684 KB Output is correct
28 Correct 5 ms 9732 KB Output is correct
29 Correct 5 ms 9684 KB Output is correct
30 Correct 5 ms 9728 KB Output is correct
31 Correct 5 ms 9684 KB Output is correct
32 Correct 6 ms 9812 KB Output is correct
33 Correct 7 ms 9844 KB Output is correct
34 Correct 9 ms 9996 KB Output is correct
35 Correct 8 ms 9940 KB Output is correct
36 Correct 66 ms 15596 KB Output is correct
37 Correct 124 ms 15552 KB Output is correct
38 Correct 188 ms 17284 KB Output is correct
39 Correct 210 ms 18124 KB Output is correct
40 Correct 172 ms 16164 KB Output is correct
41 Correct 127 ms 13968 KB Output is correct
42 Correct 130 ms 14016 KB Output is correct
43 Correct 125 ms 15736 KB Output is correct
44 Correct 5 ms 9684 KB Output is correct
45 Correct 5 ms 9684 KB Output is correct
46 Correct 6 ms 9684 KB Output is correct
47 Correct 5 ms 9684 KB Output is correct
48 Correct 7 ms 9640 KB Output is correct
49 Correct 7 ms 9940 KB Output is correct
50 Correct 8 ms 9940 KB Output is correct
51 Correct 10 ms 10000 KB Output is correct
52 Correct 9 ms 9940 KB Output is correct
53 Correct 63 ms 15820 KB Output is correct
54 Correct 202 ms 17448 KB Output is correct
55 Correct 201 ms 18196 KB Output is correct
56 Correct 173 ms 16300 KB Output is correct
57 Correct 264 ms 19268 KB Output is correct
58 Correct 63 ms 16068 KB Output is correct
59 Correct 137 ms 16080 KB Output is correct