QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#660635 | #7786. Graft and Transplant | iokanux# | WA | 0ms | 3664kb | C++20 | 917b | 2024-10-20 12:28:42 | 2024-10-20 12:28:43 |
Judging History
answer
#pragma GCC optimize(O2)
#include<bits/stdc++.h>
#define int long long
using namespace std;
void solve(){
int n;cin>>n;
vector<vector<int>>g(n+1);
vector<pair<int,int>>edges(n+1),st(n+1);
for(int i=1;i<n;i++){
int u,v;cin>>u>>v;
g[u].push_back(v);
g[v].push_back(u);
edges[i]={min(u,v),max(v,u)};
}
int ok=0;
for(int i=1;i<=n;i++){
if(g[i].size()==n-1){
cout<<"Bob\n";
return;
}
}
for(int i=1;i<n;i++){
auto [u,v]=edges[i];
if(g[v].size()==1&&g[u].size()==1) continue;
else ok++;
}
cout<<((ok&1)?"Alice":"Bob");
}
signed main(){
ios::sync_with_stdio(false);
cin.tie(nullptr);cout.tie(nullptr);
int T=1;
//cin>>T;
while(T--){
solve();
}
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 0ms
memory: 3616kb
input:
4 1 2 2 3 3 4
output:
Alice
result:
ok "Alice"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3664kb
input:
4 1 2 1 3 1 4
output:
Bob
result:
ok "Bob"
Test #3:
score: 0
Accepted
time: 0ms
memory: 3556kb
input:
2 1 2
output:
Bob
result:
ok "Bob"
Test #4:
score: 0
Accepted
time: 0ms
memory: 3544kb
input:
3 1 2 1 3
output:
Bob
result:
ok "Bob"
Test #5:
score: 0
Accepted
time: 0ms
memory: 3552kb
input:
5 2 1 2 3 3 4 1 5
output:
Bob
result:
ok "Bob"
Test #6:
score: 0
Accepted
time: 0ms
memory: 3556kb
input:
6 4 3 4 2 4 5 4 1 4 6
output:
Bob
result:
ok "Bob"
Test #7:
score: 0
Accepted
time: 0ms
memory: 3660kb
input:
7 2 4 4 1 1 5 5 3 3 7 7 6
output:
Bob
result:
ok "Bob"
Test #8:
score: -100
Wrong Answer
time: 0ms
memory: 3556kb
input:
8 2 3 3 1 3 6 7 6 6 5 7 8 6 4
output:
Alice
result:
wrong answer 1st words differ - expected: 'Bob', found: 'Alice'