QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#534564 | #7069. Farm | xiojoy# | WA | 245ms | 13456kb | C++20 | 1.6kb | 2024-08-27 13:54:28 | 2024-08-27 13:54:29 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
int n,m,q;
const int N = 1e5+10;
const int M = 5e5+10;
int f[N],to[M];
int tot,ans,tt;
struct Node{
int x,y,id;
int z;
}e[M];
bool cmp(Node a,Node b){
return a.z<b.z;
}
int find(int x){
if(f[x]!=x) f[x]=find(f[x]);
return f[x];
}
int main()
{
cin>>n>>m;
for(int i=1;i<=m;i++){
cin>>e[i].x>>e[i].y>>e[i].z;
e[i].id=i;
}
sort(e+1,e+1+m,cmp);
for(int i=1;i<=m;i++){
to[e[i].id]=i;
}
cin>>q;
while(q--){
ans=1e9+7;
for(int i=1;i<=n;i++){
f[i]=i;
}
int tot=0;
tt=0;
int u,v;
cin>>u>>v;
tot+=e[to[u]].z;
f[e[to[u]].x]=e[to[u]].y;
if(e[to[u]].x!=e[to[u]].y) tt++;
for(int i=1;i<=m;i++){
int fx=find(e[i].x);
int fy=find(e[i].y);
if(fx==fy) continue;
f[fy]=fx;
tot+=e[i].z;
tt++;
}
if(tt==n-1) ans=min(ans,tot);
for(int i=1;i<=n;i++){
f[i]=i;
}
tot=0;
tt=0;
tot+=e[to[v]].z;
f[e[to[v]].x]=e[to[v]].y;
if(e[to[v]].x!=e[to[v]].y) tt++;
for(int i=1;i<=m;i++){
int fx=find(e[i].x);
int fy=find(e[i].y);
if(fx==fy) continue;
f[fx]=fy;
tot+=e[i].z;
tt++;
}
if(tt==n-1)ans=min(ans,tot);
if(ans!=1e9+7) cout<<ans<<endl;
else cout<<-1<<endl;
}
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 1ms
memory: 5592kb
input:
4 6 1 1 2 2 4 3 1 1 4 2 4 4 3 2 4 1 3 4 1 1 2
output:
11
result:
ok single line: '11'
Test #2:
score: -100
Wrong Answer
time: 245ms
memory: 13456kb
input:
100000 500000 2516 13348 191 37713 25720 216 41568 13765 877 2116 27917 895 76904 65435 37 73053 24687 44 97127 44338 700 2251 85769 378 95166 20208 42 59303 57463 158 26863 18030 31 58613 6818 2 15455 18106 254 3232 13720 610 85677 16778 650 25618 72746 813 80365 162 47 10930 7403 645 79272 54568 6...
output:
result:
wrong answer 1st lines differ - expected: '-1', found: ''