oj.uz

Submission #725349

# Submission time Handle Problem Language Result Execution time Memory
725349 2023-04-17T10:17:34 Z sunwukong123 Jail (JOI22_jail) C++14
5 / 100
 5000 ms 48492 KB 
#include <bits/stdc++.h>
using namespace std;
#define int long long 
#define FOR(i,s,e) for(int i = s; i <= (int)e; ++i)
#define DEC(i,s,e) for(int i = s; i >= (int)e; --i)
#define IAMSPEED ios_base::sync_with_stdio(false); cin.tie(0);
#ifdef LOCAL
#define db(x) cerr << #x << "=" << x << "\n"
#define db2(x, y) cerr << #x << "=" << x << " , " << #y << "=" << y << "\n"
#define db3(a,b,c) cerr<<#a<<"="<<a<<","<<#b<<"="<<b<<","<<#c<<"="<<c<<"\n"
#define dbv(v) cerr << #v << ":"; for (auto ite : v) cerr << ite << ' '; cerr <<"\n"
#define dbvp(v) cerr << #v << ":"; for (auto ite : v) cerr << "{"  << ite.f << ',' << ite.s << "} "; cerr << "\n"
#define dba(a,ss,ee) cerr << #a << ":"; FOR(ite,ss,ee) cerr << a[ite] << ' '; cerr << "\n"
#define reach cerr << "LINE: " << __LINE__ << "\n";
#else
#define reach 
#define db(x)
#define db2(x,y)
#define db3(a,b,c)
#define dbv(v)
#define dbvp(v)
#define dba(a,ss,ee)
#endif
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
#define pb push_back
#define eb emplace_back
#define all(x) (x).begin(), (x).end()
#define f first 
#define s second
#define g0(x) get<0>(x)
#define g1(x) get<1>(x)
#define g2(x) get<2>(x)
#define g3(x) get<3>(x)
typedef pair <int, int> pi;
typedef tuple<int,int,int> ti3;
typedef tuple<int,int,int,int> ti4;
int rand(int a, int b) { return a + rng() % (b-a+1); }
const int MOD = 1e9 + 7;
const int inf = (int)1e9 + 500;
const long long oo = (long long)1e18 + 500;
template <typename T> void chmax(T& a, const T b) { a=max(a,b); }
template <typename T> void chmin(T& a, const T b) { a=min(a,b); }
const int MAXN = 120005;
int q; 
vector<int> adj[MAXN];
int S[MAXN], T[MAXN];
int dep[MAXN];
int twok[MAXN][20];
int pre[MAXN], post[MAXN];
int cnt;
int lift(int x, int k) {
	FOR(i,0,19){
		if((1<<i)&k)x=twok[x][i];
		if(x==-1)return -1;
	}
	return x;
}
int lca(int x, int y) {
	if(dep[x]>dep[y]) {
		int dd=dep[x]-dep[y];
		x=lift(x,dd);
	} else {
		int dd=dep[y]-dep[x];
		y=lift(y,dd);
	}
	if(x==y)return x;
	DEC(i,19,0){
		if(twok[x][i]!=twok[y][i]){
			x=twok[x][i];
			y=twok[y][i];
		}
	}
	return twok[x][0];
}
void dfs(int x, int p, int lvl) {
	pre[x]=cnt++;
	dep[x]=lvl;
	twok[x][0]=p;
	FOR(i,1,19){
		if(twok[x][i-1] == -1)continue;
		twok[x][i]=twok[twok[x][i-1]][i-1];
	}
	for(auto v:adj[x])if(v!=p) {
		dfs(v,x,lvl+1);
	}
	post[x]=cnt-1;
}
set<int> V[MAXN];
bool ispar(int par, int child) {
	if(pre[par]<=pre[child] && post[par]>=post[child]) return 1;
	else return 0;
}
bool onpath(int x, int y, int node) {
	int par=lca(x,y); 
	if(ispar(par,node) && (ispar(node, x) || ispar(node, y))) return 1;
	else return 0;
}
int hcycle = 0;
int vis[MAXN];
void dfs(int x) {
	bool res=0;
	if(vis[x] == 2) {
		hcycle=1;
		return;
	}
	if(vis[x]==1){
		return;
	}
	vis[x]=2; // active
	for(auto v:V[x]){ 
		dfs(v);
	}
	vis[x]=1;
}
int in[MAXN];
void solve(){
	int n; cin >> n;
	FOR(i,1,n-1) {
		int a,b; cin >> a >> b;
		adj[a].pb(b);
		adj[b].pb(a);
	}
	dfs(1,-1,0);
	int m; cin >> m;
	FOR(i,1,m) cin >> S[i] >> T[i];
	bool bad=0;
	FOR(i,1,m){
		FOR(j,1,m){
			if(i!=j) {
				// check if there's an edge between i and j
				bool y1=onpath(S[i],T[i],S[j]);
				bool y2=onpath(S[i],T[i],T[j]);
				if(y1&&y2){
					bad=1;
					goto done;
				}
				if(y1) { // you must do j before i
					V[j].insert(i);
				} 
				if(y2) { // you must do j after i
					V[i].insert(j);
				}
			}
		}
	}
	hcycle=0;
	FOR(i,1,m) {
		dfs(i);
	}
	bad|=hcycle;
	done:;
	if(bad)cout<<"No\n";
	else cout<<"Yes\n";

	cnt=0;
	FOR(i,1,n)FOR(j,0,19)twok[i][j]=-1;
	FOR(i,1,n)pre[i]=post[i]=0;
	FOR(i,1,n)dep[i]=0;
	FOR(i,1,n)vis[i]=0;
	FOR(i,1,n)V[i].clear();
	FOR(i,1,n)S[i]=T[i]=0;
	FOR(i,1,n)adj[i].clear();
}
int32_t main() 
{
	IAMSPEED
	cin >> q;
	while(q--)solve();

}

Compilation message

jail.cpp: In function 'void dfs(long long int)':
jail.cpp:101:7: warning: unused variable 'res' [-Wunused-variable]
  101 |  bool res=0;
      |       ^~~

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 8788 KB Output is correct
2 Correct 5 ms 8824 KB Output is correct
3 Correct 5 ms 8788 KB Output is correct
4 Correct 13 ms 8860 KB Output is correct
5 Correct 22 ms 8788 KB Output is correct
6 Correct 5 ms 8788 KB Output is correct
7 Correct 5 ms 8788 KB Output is correct
8 Correct 12 ms 9132 KB Output is correct
9 Correct 217 ms 16380 KB Output is correct
10 Correct 100 ms 48492 KB Output is correct
11 Correct 10 ms 8788 KB Output is correct
12 Correct 54 ms 8788 KB Output is correct
13 Execution timed out 5033 ms 42188 KB Time limit exceeded
14 Halted 0 ms 0 KB -

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 8788 KB Output is correct
2 Correct 5 ms 8788 KB Output is correct
3 Correct 5 ms 8788 KB Output is correct
4 Correct 6 ms 8788 KB Output is correct
5 Correct 6 ms 8788 KB Output is correct
6 Correct 6 ms 8788 KB Output is correct
7 Correct 5 ms 8892 KB Output is correct
8 Correct 5 ms 8788 KB Output is correct
9 Correct 6 ms 8788 KB Output is correct
10 Correct 5 ms 8788 KB Output is correct
11 Correct 6 ms 8788 KB Output is correct
12 Correct 5 ms 8788 KB Output is correct
13 Correct 6 ms 8788 KB Output is correct

Subtask #3
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 8788 KB Output is correct
2 Correct 5 ms 8788 KB Output is correct
3 Correct 5 ms 8788 KB Output is correct
4 Correct 6 ms 8788 KB Output is correct
5 Correct 6 ms 8788 KB Output is correct
6 Correct 6 ms 8788 KB Output is correct
7 Correct 5 ms 8892 KB Output is correct
8 Correct 5 ms 8788 KB Output is correct
9 Correct 6 ms 8788 KB Output is correct
10 Correct 5 ms 8788 KB Output is correct
11 Correct 6 ms 8788 KB Output is correct
12 Correct 5 ms 8788 KB Output is correct
13 Correct 6 ms 8788 KB Output is correct
14 Correct 4 ms 8788 KB Output is correct
15 Correct 5 ms 8788 KB Output is correct
16 Correct 6 ms 8900 KB Output is correct
17 Correct 5 ms 8788 KB Output is correct
18 Correct 6 ms 8788 KB Output is correct
19 Correct 6 ms 8736 KB Output is correct
20 Correct 5 ms 8788 KB Output is correct
21 Correct 5 ms 8788 KB Output is correct
22 Correct 6 ms 8788 KB Output is correct
23 Correct 6 ms 8916 KB Output is correct
24 Incorrect 5 ms 8788 KB Output isn't correct
25 Halted 0 ms 0 KB -

Subtask #4
0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 8788 KB Output is correct
2 Correct 5 ms 8788 KB Output is correct
3 Correct 5 ms 8788 KB Output is correct
4 Correct 6 ms 8788 KB Output is correct
5 Correct 6 ms 8788 KB Output is correct
6 Correct 6 ms 8788 KB Output is correct
7 Correct 5 ms 8892 KB Output is correct
8 Correct 5 ms 8788 KB Output is correct
9 Correct 6 ms 8788 KB Output is correct
10 Correct 5 ms 8788 KB Output is correct
11 Correct 6 ms 8788 KB Output is correct
12 Correct 5 ms 8788 KB Output is correct
13 Correct 6 ms 8788 KB Output is correct
14 Correct 4 ms 8788 KB Output is correct
15 Correct 5 ms 8788 KB Output is correct
16 Correct 6 ms 8900 KB Output is correct
17 Correct 5 ms 8788 KB Output is correct
18 Correct 6 ms 8788 KB Output is correct
19 Correct 6 ms 8736 KB Output is correct
20 Correct 5 ms 8788 KB Output is correct
21 Correct 5 ms 8788 KB Output is correct
22 Correct 6 ms 8788 KB Output is correct
23 Correct 6 ms 8916 KB Output is correct
24 Incorrect 5 ms 8788 KB Output isn't correct
25 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 8788 KB Output is correct
2 Correct 5 ms 8788 KB Output is correct
3 Correct 5 ms 8788 KB Output is correct
4 Correct 6 ms 8788 KB Output is correct
5 Correct 6 ms 8788 KB Output is correct
6 Correct 6 ms 8788 KB Output is correct
7 Correct 5 ms 8892 KB Output is correct
8 Correct 5 ms 8788 KB Output is correct
9 Correct 6 ms 8788 KB Output is correct
10 Correct 5 ms 8788 KB Output is correct
11 Correct 6 ms 8788 KB Output is correct
12 Correct 5 ms 8788 KB Output is correct
13 Correct 6 ms 8788 KB Output is correct
14 Correct 4 ms 8788 KB Output is correct
15 Correct 5 ms 8788 KB Output is correct
16 Correct 6 ms 8900 KB Output is correct
17 Correct 5 ms 8788 KB Output is correct
18 Correct 6 ms 8788 KB Output is correct
19 Correct 6 ms 8736 KB Output is correct
20 Correct 5 ms 8788 KB Output is correct
21 Correct 5 ms 8788 KB Output is correct
22 Correct 6 ms 8788 KB Output is correct
23 Correct 6 ms 8916 KB Output is correct
24 Incorrect 5 ms 8788 KB Output isn't correct
25 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 8740 KB Output is correct
2 Correct 5 ms 8732 KB Output is correct
3 Correct 6 ms 8760 KB Output is correct
4 Correct 6 ms 8772 KB Output is correct
5 Correct 11 ms 8788 KB Output is correct
6 Correct 5 ms 8788 KB Output is correct
7 Correct 7 ms 8860 KB Output is correct
8 Correct 5 ms 8788 KB Output is correct
9 Correct 4 ms 8788 KB Output is correct
10 Incorrect 5 ms 8788 KB Output isn't correct
11 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 8788 KB Output is correct
2 Correct 5 ms 8824 KB Output is correct
3 Correct 5 ms 8788 KB Output is correct
4 Correct 13 ms 8860 KB Output is correct
5 Correct 22 ms 8788 KB Output is correct
6 Correct 5 ms 8788 KB Output is correct
7 Correct 5 ms 8788 KB Output is correct
8 Correct 12 ms 9132 KB Output is correct
9 Correct 217 ms 16380 KB Output is correct
10 Correct 100 ms 48492 KB Output is correct
11 Correct 10 ms 8788 KB Output is correct
12 Correct 54 ms 8788 KB Output is correct
13 Execution timed out 5033 ms 42188 KB Time limit exceeded
14 Halted 0 ms 0 KB -