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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#865061 | #9983. Color-Balanced Tree | yhddd | WA | 0ms | 7888kb | C++20 | 1.4kb | 2025-01-21 14:26:44 | 2025-01-21 14:26:45 |
Judging History
answer
#include<bits/stdc++.h>
#define int long long
#define mod 998244353ll
#define pii pair<int,int>
#define fi first
#define se second
#define mems(x,y) memset(x,y,sizeof(x))
#define pb push_back
#define db double
using namespace std;
const int maxn=200010;
const int inf=1e18;
inline int read(){
int x=0,f=1;
char ch=getchar();
while(ch<'0'||ch>'9'){if(ch=='-')f=-1;ch=getchar();}
while(ch>='0'&&ch<='9'){x=(x<<3)+(x<<1)+(ch-48);ch=getchar();}
return x*f;
}
bool Mbe;
int n;
int head[maxn],tot;
struct nd{
int nxt,to;
}e[maxn<<1];
void add(int u,int v){e[++tot]={head[u],v};head[u]=tot;}
int col[maxn];
void dfs(int u,int fa){
col[u]=col[fa]^1;
for(int i=head[u];i;i=e[i].nxt){
int v=e[i].to;if(v==fa)continue;
dfs(v,u);
}
}
void work(){
n=read();
for(int i=1;i<=2*n;i++)head[i]=0;tot=0;
for(int i=1;i<2*n;i++){
int u=read(),v=read();
add(u,v),add(v,u);
}
dfs(1,0);
int num=0;for(int i=1;i<=2*n;i++)num+=col[i]*2-1;
if(num<0){
for(int i=1;i<=2*n;i++)col[i]=1-col[i];num=-num;
}
for(int i=2;i<=2*n;i++)if(!e[head[i]].nxt&&col[i]&&num){
col[i]=0;
num/=2;
}
for(int i=1;i<=2*n;i++)printf("%lld ",col[i]);puts("");
}
// \
444
bool Med;
int T;
signed main(){
// freopen(".in","r",stdin);
// freopen(".out","w",stdout);
// ios::sync_with_stdio(0);
// cin.tie(0);cout.tie(0);
// cerr<<(&Mbe-&Med)/1048576.0<<" MB\n";
T=read();
while(T--)work();
}
Details
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Test #1:
score: 0
Wrong Answer
time: 0ms
memory: 7888kb
input:
4 3 1 2 2 3 2 4 4 5 4 6 3 1 2 1 3 1 4 1 5 1 6 4 1 2 2 3 3 4 4 5 5 6 6 7 7 8 5 1 2 1 4 4 3 4 5 5 6 5 8 8 7 8 9 9 10
output:
1 0 1 1 0 0 0 0 0 0 1 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0
result:
wrong answer The number of black vertices and red vertices are not equal (test case 2)