#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
#define ff first
#define ss second
#define pb push_back
#define all(a) (a).begin(), (a).end()
#define replr(i, a, b) for (int i = int(a); i <= int(b); ++i)
#define reprl(i, a, b) for (int i = int(a); i >= int(b); --i)
#define rep(i, n) for (int i = 0; i < int(n); ++i)
#define mkp(a, b) make_pair(a, b)
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> PII;
typedef vector<int> VI;
typedef vector<PII> VPI;
typedef vector<VI> VVI;
typedef vector<VVI> VVVI;
typedef vector<VPI> VVPI;
typedef pair<ll, ll> PLL;
typedef vector<ll> VL;
typedef vector<PLL> VPL;
typedef vector<VL> VVL;
typedef vector<VVL> VVVL;
typedef vector<VPL> VVPL;
template<class T> T setmax(T& a, T b) {if (a < b) return a = b; return a;}
template<class T> T setmin(T& a, T b) {if (a < b) return a; return a = b;}
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
template<class T>
using indset = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
#include "simurgh.h"
int n;
VVI gp;
VI vis;
bool dfs(int u = 0, int p = -1) {
vis[u] = true;
for (int v : gp[u]) if (v != p) {
if (vis[v]) return false;
if (!dfs(v, u)) return false;
}
return true;
}
bool istree(VPI edges) {
gp = VVI(n);
vis = VI(n);
for (auto[u, v] : edges) {
gp[u].pb(v);
gp[v].pb(u);
}
/*return dfs();*/
dfs();
rep(u, n) if (!vis[u]) return false;
return true;
}
VI find_roads(int N, VI u, VI v) {
n = N;
int m = u.size();
int q = 0;
rep(s, 1<<m) {
int cnt = 0;
rep(i, m) if (s & (1<<i)) cnt++;
if (cnt != n-1) continue;
VPI edges;
rep(i, m) if (s & (1<<i)) edges.pb({u[i], v[i]});
if (!istree(edges)) continue;
VI ret;
rep(i, m) if (s & (1<<i)) ret.pb(i);
q++;
assert(q <= 30000);
if (count_common_roads(ret) == n-1) return ret;
}
return VI();
}
Compilation message
simurgh.cpp: In function 'bool istree(VPI)':
simurgh.cpp:50:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
50 | for (auto[u, v] : edges) {
| ^
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
9 ms |
348 KB |
correct |
| 2 |
Correct |
39 ms |
348 KB |
correct |
| 3 |
Correct |
59 ms |
344 KB |
correct |
| 4 |
Correct |
1 ms |
348 KB |
correct |
| 5 |
Correct |
0 ms |
348 KB |
correct |
| 6 |
Correct |
3 ms |
348 KB |
correct |
| 7 |
Correct |
0 ms |
348 KB |
correct |
| 8 |
Correct |
0 ms |
348 KB |
correct |
| 9 |
Correct |
0 ms |
348 KB |
correct |
| 10 |
Correct |
1 ms |
348 KB |
correct |
| 11 |
Correct |
0 ms |
348 KB |
correct |
| 12 |
Correct |
1 ms |
348 KB |
correct |
| 13 |
Correct |
17 ms |
432 KB |
correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
9 ms |
348 KB |
correct |
| 2 |
Correct |
39 ms |
348 KB |
correct |
| 3 |
Correct |
59 ms |
344 KB |
correct |
| 4 |
Correct |
1 ms |
348 KB |
correct |
| 5 |
Correct |
0 ms |
348 KB |
correct |
| 6 |
Correct |
3 ms |
348 KB |
correct |
| 7 |
Correct |
0 ms |
348 KB |
correct |
| 8 |
Correct |
0 ms |
348 KB |
correct |
| 9 |
Correct |
0 ms |
348 KB |
correct |
| 10 |
Correct |
1 ms |
348 KB |
correct |
| 11 |
Correct |
0 ms |
348 KB |
correct |
| 12 |
Correct |
1 ms |
348 KB |
correct |
| 13 |
Correct |
17 ms |
432 KB |
correct |
| 14 |
Incorrect |
1 ms |
348 KB |
WA in grader: NO |
| 15 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
9 ms |
348 KB |
correct |
| 2 |
Correct |
39 ms |
348 KB |
correct |
| 3 |
Correct |
59 ms |
344 KB |
correct |
| 4 |
Correct |
1 ms |
348 KB |
correct |
| 5 |
Correct |
0 ms |
348 KB |
correct |
| 6 |
Correct |
3 ms |
348 KB |
correct |
| 7 |
Correct |
0 ms |
348 KB |
correct |
| 8 |
Correct |
0 ms |
348 KB |
correct |
| 9 |
Correct |
0 ms |
348 KB |
correct |
| 10 |
Correct |
1 ms |
348 KB |
correct |
| 11 |
Correct |
0 ms |
348 KB |
correct |
| 12 |
Correct |
1 ms |
348 KB |
correct |
| 13 |
Correct |
17 ms |
432 KB |
correct |
| 14 |
Incorrect |
1 ms |
348 KB |
WA in grader: NO |
| 15 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
344 KB |
correct |
| 2 |
Incorrect |
1 ms |
344 KB |
WA in grader: NO |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
9 ms |
348 KB |
correct |
| 2 |
Correct |
39 ms |
348 KB |
correct |
| 3 |
Correct |
59 ms |
344 KB |
correct |
| 4 |
Correct |
1 ms |
348 KB |
correct |
| 5 |
Correct |
0 ms |
348 KB |
correct |
| 6 |
Correct |
3 ms |
348 KB |
correct |
| 7 |
Correct |
0 ms |
348 KB |
correct |
| 8 |
Correct |
0 ms |
348 KB |
correct |
| 9 |
Correct |
0 ms |
348 KB |
correct |
| 10 |
Correct |
1 ms |
348 KB |
correct |
| 11 |
Correct |
0 ms |
348 KB |
correct |
| 12 |
Correct |
1 ms |
348 KB |
correct |
| 13 |
Correct |
17 ms |
432 KB |
correct |
| 14 |
Incorrect |
1 ms |
348 KB |
WA in grader: NO |
| 15 |
Halted |
0 ms |
0 KB |
- |
