/*
author : abushbandit
contest : ---
*/
#include "bits/stdc++.h"
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
using namespace std;
#define int long long
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define ff first
#define ss second
#define pb push_back
#define rep(i,s,f) for(int i = s;i < f;i++)
#define ordered_set tree<int, null_type,less<int>, rb_tree_tag,tree_order_statistics_node_update>
#pragma GCC optimize("Ofast,no-stack-protector,fast-math",3)
template <class type1>
using ordered_multiset = tree <type1, null_type, less_equal <type1>, rb_tree_tag, tree_order_statistics_node_update>;
typedef long long ll;
typedef long double ld;
typedef vector<int> vi;
typedef vector<pair<int,int>> vii;
typedef pair<int,int> pii;
const ll INF = 1e18;
const ll MOD7 = 1e9 + 7;
const ll MOD9 = 998244353;
const ld PI = acos(-1.0);
const int N = 120000 + 2;
template <class F, class _S>
bool chmin(F &u, const _S &v){
bool flag = false;
if ( u > v ){
u = v; flag |= true;
}
return flag;
}
template <class F, class _S>
bool chmax(F &u, const _S &v){
bool flag = false;
if ( u < v ){
u = v; flag |= true;
}
return flag;
}
int binpow (int a, int n) {
int res = 1;
while (n) {
if (n & 1)
res *= a;
a *= a;
n >>= 1;
}
return res;
}
void start_file(string file){
freopen((file + ".in").c_str(),"r",stdin);
freopen((file + ".out").c_str(),"w",stdout);
}
void solve() {
int n;
cin >> n;
vector<vector<int>> g(n);
bool bamboo = 1;
for (int i = 1; i < n; ++i) {
int a, b;
cin >> a >> b;
if(!(a == i && b == i + 1)){
bamboo = 0;
}
g[a - 1].push_back(b - 1);
g[b - 1].push_back(a - 1);
}
if(bamboo) {
vector<bool> vis(n, 0);
bool flag = 1;
deque<pair<int, int>> l, r;
int m;
cin>>m;
while (m--) {
int s, t;
cin >> s >> t;
if (t > s) {
r.pb({t - 1, s - 1});
} else {
l.pb({t - 1, s - 1});
}
vis[s] = 1;
}
sort(all(l));
sort(all(r));
while(!l.empty()){
int s = l.front().second, t = l.front().first;
l.pop_front();
vis[s] = 0;
while (s >= t) {
if (vis[s]) {
flag = 0;
break;
}
s--;
}
vis[t] = 1;
}
while(!r.empty()){
int s = r.back().second, t = r.back().first;
r.pop_back();
vis[s] = 0;
while(s <= t) {
if (vis[s]) {
flag = 0;
break;
}
s++;
}
vis[t] = 1;
}
if(flag){
cout << "Yes\n";
} else{
cout << "No\n";
}
} else {
}
}
signed main() {
ios_base::sync_with_stdio(0);cin.tie(NULL);cout.tie(NULL);
int t = 1;
cin >> t;
while(t--){
solve();
}
}
Compilation message
jail.cpp: In function 'void start_file(std::string)':
jail.cpp:75:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
75 | freopen((file + ".in").c_str(),"r",stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
jail.cpp:76:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
76 | freopen((file + ".out").c_str(),"w",stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
0 ms |
344 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
0 ms |
344 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
0 ms |
344 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
0 ms |
344 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
0 ms |
344 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
1 ms |
348 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
0 ms |
344 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
