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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#691901 | #8333. Gift | charmyy | WA | 0ms | 10556kb | C++14 | 1.0kb | 2024-10-31 13:21:39 | 2024-10-31 13:21:39 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
#define int long long
typedef pair<int,int> pii;
const int N = 2e5+5;
int n;
vector<int> e[N];
int du[N],du1[N];
signed main(){
ios::sync_with_stdio(false);
cin.tie(nullptr);
cin>>n;
for(int i=1;i<=n;i++){
int x,y;
cin>>x>>y;
e[x].push_back(y);
e[y].push_back(x);
du[x]++,du[y]++;
du1[x]++,du1[y]++;
}
queue<int> q;
set<int> s;
int sum=0;
for(int i=1;i<=n;i++){
if(du1[i]==1){
q.push(i);
}
if(du1[i]>=4){
sum++;
}
if(du1[i]==5){
s.insert(i);
}
}
while(!q.empty()){
int t=q.front();
q.pop();
for(auto v:e[t]){
if(du1[v]!=1){
du1[v]--;
if(du1[v]==1){
q.push(v);
}
}
}
}
set<int> se;
for(int i=1;i<=n;i++){
if(du1[i]!=1){
se.insert(i);
}
}
int ans=0;
for(auto i:se){
for(auto j:e[i]){
if(se.count(j)!=0&&se.size()-s.count(j)!=0){
ans+=n-sum;
if(du[i]==4) ans++;
if(du[j]==4) ans++;
}
}
}
cout<<ans/2<<"\n";
return 0;
}
Details
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Test #1:
score: 0
Wrong Answer
time: 0ms
memory: 10556kb
input:
6 1 2 1 3 1 4 1 5 1 6 2 3
output:
15
result:
wrong answer 1st numbers differ - expected: '10', found: '15'