#include <bits/stdc++.h>
#include <fstream>
#include<ext/pb_ds/assoc_container.hpp>
#include<ext/pb_ds/tree_policy.hpp>
#define endl '\n'
#define mod 1000000007
#define INF 1000000000
#define INF2 2000000000
#define fi first
#define se second
using namespace std;
double const EPS = 1e-14;
const int P = 1007;
typedef long long ll;
using namespace __gnu_pbds;
typedef long long ll;
typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> ordered_set; // find_by_order, order_of_key
const int Max = 1e5 + 5;
int n, m;
vector<int> v[Max];
set<int> st[Max];
map<pair<int,int>,int> mp, cnt;
vector<int> now;
bool vis[Max];
int nod;
void dfs(int s) {
vis[s] = 1;
// cout << s << endl;
if(st[nod].find(s) != st[nod].end()) {
for(int i = now.size()-1; i >= 1; i--) {
// cout << now[i-1] << ' ' << now[i] << 'r' << endl;
if(mp[{now[i],now[i-1]}] == 0) {
mp[{now[i],now[i-1]}] = 3;
}
if(mp[{now[i-1],now[i]}] == 0) {
mp[{now[i-1],now[i]}] = 2;
}
}
}
for(auto i : v[s]) {
if(vis[i] == 0) {
cnt[{s,i}]--;
cnt[{i,s}]--;
now.push_back(i);
dfs(i);
now.pop_back();
}
else if(cnt[{s,i}] > 0) {
cnt[{s,i}]--;
cnt[{i,s}]--;
int last = i;
for(int j = now.size()-1; j >= 0; j--) {
mp[{now[j],last}] = 1;
mp[{last,now[j]}] = 1;
last = now[j];
if(now[j] == i) {
break;
}
}
}
}
}
int main()
{
ios_base::sync_with_stdio(0);cout.tie(0);cin.tie(0);
cin >> n >> m;
pair<int,int> edge[m];
for(int i = 0; i < m; i++) {
int a, b; cin >> a >> b;
edge[i].fi = a; edge[i].se = b;
v[a].push_back(b);
v[b].push_back(a);
}
int p; cin >> p;
vector<int> vv;
while(p--) {
int a, b; cin >> a >> b;
st[a].insert(b);
vv.push_back(a);
}
for(int i = 0; i < vv.size(); i++) {
for(int j = 1; j <= n; j++) { vis[j] = 0;}
for(int j = 0; j < m; j++) {
cnt[{edge[j].fi,edge[j].se}]++;
cnt[{edge[j].se,edge[j].fi}]++;
}
nod = vv[i];
now.push_back(nod);
dfs(vv[i]);
now.pop_back();
}
for(int i = 0; i < m; i++) {
int ans = mp[{edge[i].fi,edge[i].se}];
// cout << ans << endl;
// cout << edge[i].fi << ' ' << edge[i].se << 'l' << endl;
if(ans <= 1) {
cout << 'B';
}
else if(ans == 2) {
cout << 'R';
}
else {
cout << 'L';
}
}
cout << endl;
return 0;
}
Compilation message
oneway.cpp: In function 'int main()':
oneway.cpp:83:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
83 | for(int i = 0; i < vv.size(); i++) {
| ~~^~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
7512 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
7512 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
7512 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
