#include "simurgh.h"
#include <bits/stdc++.h>
#define pb push_back
#define F first
#define S second
#define all(x) x.begin(), x.end()
using namespace std;
typedef pair<int, int> pii;
typedef long long ll;
const int N = 500 + 10;
vector<pii> G[N], H[N];
int mk[N], E[N], par[N], dep[N];
vector<int> R;
void DFS1(int u, int d = 0){
mk[u] = 1;
dep[u] = d;
for(auto [adj, id] : G[u]){
if(!mk[adj]){
R.pb(id);
par[adj] = u;
DFS1(adj, d + 1);
E[adj] = id;
}
}
}
ll f;
map<pii, int> mp;
int Ask(int rm, int is){
if(mp.count({rm, is})) return mp[{rm, is}];
vector<int> R2 = R;
for(auto &x : R2) if(x == rm) x = is;
return mp[{rm, is}] = count_common_roads(R2);
}
int sta[N * N];
vector<int> find_roads(int n, vector<int> u, vector<int> v) {
vector<int> r(n - 1);
int m = u.size();
for(int i = 0; i < m; i++){
G[u[i]].pb({v[i], i});
G[v[i]].pb({u[i], i});
}
DFS1(0, 0);
f = count_common_roads(R);
E[0] = -1;
par[0] = -1;
vector<int> X;
for(int i = 0; i < m; i++){
if(dep[u[i]] > dep[v[i]]) swap(u[i], v[i]);
if(E[v[i]] == i) continue;
X.clear();
int nw = v[i];
//cerr << '\n';
while(nw != u[i]){
//cerr << "# " << nw << '\n';
X.pb(E[nw]);
nw = par[nw];
}
int mn = f;
bool flg = false;
for(auto x : X){
if(sta[x] && flg) continue;
if(sta[x] == 1){
mn = min(mn, Ask(x, i) - 1);
flg = true;
} else if(sta[x] == 2){
mn = min(mn, Ask(x, i));
flg = true;
} else {
mn = min(mn, Ask(x, i));
}
}
if(flg){
if(f == mn) sta[i] = 1;
else sta[i] = 2;
for(auto x : X){
if(sta[x] == 0){
if(Ask(x, i) == mn) sta[x] = 1;
else sta[x] = 2;
}
}
} else {
bool f2 = false;
for(auto x : X) if(mn != Ask(x, i)) f2 = true;
if(f2){
if(f == mn) sta[i] = 1;
else sta[i] = 2;
for(auto x : X){
if(sta[x] == 0){
if(Ask(x, i) == mn) sta[x] = 1;
else sta[x] = 2;
}
}
} else {
sta[i] = 1;
for(auto x : X) sta[x] = 1;
}
}
}
vector<int> res;
for(int i = 0; i < m; i++) if(sta[i] != 1) res.pb(i);
assert(((int) res.size()) == n - 1);
return r;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
1 ms |
512 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
1 ms |
512 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
1 ms |
512 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
384 KB |
correct |
| 2 |
Runtime error |
1 ms |
512 KB |
Execution killed with signal 11 |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
1 ms |
512 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
