#include <bits/stdc++.h>
using namespace std;
typedef pair<int,int> pii;
int n,m,mark1[100001],mark2[100001],dis[100001],edge[100001],k[100001],root;
vector<pii> adj[100001];
pii ed[100001];
bool vis[100001];
string ans;
void dfs(int x, int par) {
vis[x]=true;
for (auto s : adj[x]) {
if (s.first==par) continue;
if (vis[s.first]) {
++mark2[x];
--mark2[s.first];
ans[s.second]='B';
} else {
edge[s.first]=s.second;
dfs(s.first,x);
mark2[x]+=mark2[s.first];
mark1[x]+=mark1[s.first];
}
}
if (x==root) return;
if (mark2[x]) ans[edge[x]]='B';
else {
if (mark1[x]>0) {
if (ed[edge[x]].first==x) ans[edge[x]]='R';
else ans[edge[x]]='L';
} else if (mark1[x]<0) {
if (ed[edge[x]].first==x) ans[edge[x]]='L';
else ans[edge[x]]='R';
} else {
ans[edge[x]]='B';
}
}
}
int main() {
ios_base::sync_with_stdio(0); cin.tie(0);
cin>>n>>m;
for (int i=0; i<m; ++i) {
int a,b; cin>>a>>b;
ans+=" ";
adj[a].push_back(pii(b,i));
adj[b].push_back(pii(a,i));
ed[i]=pii(a,b);
}
int k; cin>>k;
while (k--) {
int a,b; cin>>a>>b;
mark1[a]++;
mark1[b]--;
}
for (int i=1; i<=n; ++i) {
if (!vis[i]) {
root=i;
dfs(root,0);
}
}
cout<<ans;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
1 ms |
2644 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
1 ms |
2644 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
1 ms |
2644 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |