#include<bits/stdc++.h>
using namespace std;
const int maxn=100000+10,maxm=200000+10;
struct yal{
int u,v,c,w;
int getad(int fu){
return (u^v^fu);
}
}alle[maxm];
int n,m,vis[maxn];
long long mainres=-1;
vector<int>adj[maxn];
map<int,int>sum[maxn];
map<int,vector<int>>all[maxn];
void vorod(){
cin>>n>>m;
for(int i=0;i<m;i++){
cin>>alle[i].u>>alle[i].v>>alle[i].c>>alle[i].w;
adj[alle[i].u].push_back(i);
adj[alle[i].v].push_back(i);
sum[alle[i].u][alle[i].c]+=alle[i].w;
sum[alle[i].v][alle[i].c]+=alle[i].w;
all[alle[i].u][alle[i].c].push_back(i);
all[alle[i].v][alle[i].c].push_back(i);
}
}
set<pair<int,pair<int,int>>>st;
void aval(int u,int w){
for(auto x:adj[u]){
int v=alle[x].getad(u);
st.insert(make_pair(w+min(alle[x].w,sum[u][alle[x].c]-alle[x].w),make_pair(v,-1)));
st.insert(make_pair(w,make_pair(v,x)));
}
}
void upd(int u,int ind,int w){
if(ind==-1){
return ;
}
int f=0;
for(auto x:all[u][alle[ind].c]){
if(x==ind){
f=1;
continue;
}
int v=alle[x].getad(u);
st.insert(make_pair(w+sum[u][alle[x].c]-alle[x].w,make_pair(v,-1)));
}
all[u][alle[ind].c].clear();
if(f){
all[u][alle[ind].c].push_back(ind);
}
}
void solve(){
aval(1,0);
vis[1]=1;
while((int)st.size()>0){
auto x=*st.begin();
st.erase(x);
int u=x.second.first,w=x.first,from=x.second.second;
if(x.second.first==n&&from==-1){
mainres=x.first;
return ;
}
if(vis[u]==0&&from==-1){
aval(u,w);
vis[u]=1;
}
upd(u,from,w);
}
}
void khor(){
cout<<mainres<<"\n";
}
int main(){
ios::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
// freopen("inp.txt","r",stdin);
vorod();
solve();
khor();
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
3 ms |
12888 KB |
Output is correct |
2 |
Correct |
4 ms |
12892 KB |
Output is correct |
3 |
Correct |
2 ms |
12888 KB |
Output is correct |
4 |
Correct |
2 ms |
12892 KB |
Output is correct |
5 |
Correct |
3 ms |
12892 KB |
Output is correct |
6 |
Incorrect |
3 ms |
12892 KB |
Output isn't correct |
7 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
218 ms |
34176 KB |
Output is correct |
2 |
Correct |
76 ms |
23900 KB |
Output is correct |
3 |
Correct |
167 ms |
33616 KB |
Output is correct |
4 |
Correct |
105 ms |
27612 KB |
Output is correct |
5 |
Correct |
1071 ms |
78540 KB |
Output is correct |
6 |
Correct |
894 ms |
67844 KB |
Output is correct |
7 |
Correct |
504 ms |
68760 KB |
Output is correct |
8 |
Correct |
417 ms |
40708 KB |
Output is correct |
9 |
Correct |
440 ms |
40788 KB |
Output is correct |
10 |
Correct |
335 ms |
44884 KB |
Output is correct |
11 |
Correct |
95 ms |
31060 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
3 ms |
12888 KB |
Output is correct |
2 |
Correct |
4 ms |
12892 KB |
Output is correct |
3 |
Correct |
2 ms |
12888 KB |
Output is correct |
4 |
Correct |
2 ms |
12892 KB |
Output is correct |
5 |
Correct |
3 ms |
12892 KB |
Output is correct |
6 |
Incorrect |
3 ms |
12892 KB |
Output isn't correct |
7 |
Halted |
0 ms |
0 KB |
- |