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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#411009 | #8150. XOR Sum | sycqwq | WA | 0ms | 46832kb | C++14 | 2.8kb | 2024-05-14 20:08:04 | 2024-05-14 20:08:05 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
const int maxn=5e5+5;
int _;
int n,m,a[maxn];
vector<int> e[maxn],t[maxn],g[maxn];
int x[maxn],y[maxn],fa[maxn],col[maxn],f[maxn],d[maxn],dp[maxn];
int getfa(int x)
{
return x==fa[x]?x:fa[x]=getfa(fa[x]);
}
int main()
{
// freopen("in.in","r",stdin);
// freopen("out.out","w",stdout);
cin>>_;
while(_--)
{
cin>>n>>m;
for(int i=1;i<=n;i++)
e[i].clear(),t[i].clear(),g[i].clear(),f[i]=dp[i]=0,d[i]=0;;
for(int i=1;i<=m;i++)
{
cin>>x[i]>>y[i];
e[x[i]].push_back(y[i]);
}
for(int i=1;i<=n;i++)
fa[i]=i;
for(int i=1;i<=n;i++)
{
int t=0;
for(auto v:e[i])
{
if(!t)
t=getfa(v);
fa[getfa(v)]=t;
}
}
int pd=0;
for(int i=1;i<=m;i++)
if(getfa(x[i])==getfa(y[i]))
pd=1;
if(pd)
{
cout<<"No"<<'\n';
continue;
}
int co=0;
memset(d,0,sizeof d);
for(int i=1;i<=n;i++)
if(getfa(i)==i)
col[i]=++co;
for(int i=1;i<=n;i++)
col[i]=col[getfa(i)],t[col[i]].push_back(i);
for(int i=1;i<=m;i++)
g[col[x[i]]].push_back(col[y[i]]),++d[col[y[i]]];
queue<int> q;
q.push(col[1]);
while(!q.empty())
{
int x=q.front();
q.pop();
for(auto v:g[x])
{
--d[v];
if(d[v]==0)
q.push(v);
}
}
for(int i=1;i<=co;i++)
if(d[i])
pd=1;
if(pd)
{
cout<<"No"<<'\n';
continue;
}
for(int i=1;i<=co;i++)
g[i].clear();
for(int i=1;i<=m;i++)
g[col[y[i]]].push_back(col[x[i]]),++d[col[x[i]]];
q.push(col[n]);
while(!q.empty())
{
int x=q.front();
q.pop();
// cerr<<x<<'\n';
int ma=0;
for(auto p:t[x])
{
for(auto v:e[p])
dp[p]=f[col[v]];
ma=max(ma,dp[p]+1);
// cerr<<p<
}
// cerr<<x<<' '<<ma<<'\n';
f[x]=ma;
for(auto p:t[x])
a[p]=ma-dp[p];
for(auto v:g[x])
{
--d[v];
if(d[v]==0)
q.push(v);
}
}
cout<<"Yes\n";
for(int i=1;i<=n;i++)
cout<<a[i]<<' ';
cout<<'\n';
}
return 0;
}
Details
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Test #1:
score: 0
Wrong Answer
time: 0ms
memory: 46832kb
input:
6 2 3
output:
No No No No No No
result:
wrong output format Expected integer, but "No" found