oj.uz

Submission #672466

# Submission time Handle Problem Language Result Execution time Memory
672466 2022-12-16T10:08:54 Z Cutebol Birthday gift (IZhO18_treearray) C++17
0 / 100
 15 ms 28616 KB 
	#include <bits/stdc++.h>
	 
	using namespace std;
	 
	void fopn(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
	#define Scaramouche ios_base::sync_with_stdio(0) ; cin.tie(0) ; cout.tie(0);
	#define int long long
	#define itn int
	#define endl "\n"
	#define ff first
	#define ss second
	   
	const int N = 2e5 + 5 ;
	const int mod = 1e9 + 7 ;
	const int inf = 1e12 ;
	
	int n , m , q , l = 1 , timer ;
	int prv[N] , tin[N] , tout[N] , a[N] ;
	vector <int> g[N] , up[N] ;
	set <int> par[N] , st[N] ;
	
	void dfs( int v , int p = 1 ){
		tin[v] = ++timer ;
		up[v][0] = p ;
		for ( int i = 1 ; i <= l ; i ++ ) up[v][i] = up[up[v][i-1]][i-1] ;
		for ( auto to : g[v] ){
			if ( to != p ) dfs(to ,v) ;
		}
		tout[v] = ++ timer ;
	}
	
	bool upper( int a , int b ){
		return tin[a] <= tin[b] && tout[a] >= tout[b] ;
	}
	int lca ( int a , int b ){
		if ( upper(a,b) ) return a ;
		if ( upper(b,a) ) return b ;
		for ( int i = l ; i >= 0 ; i -- )
			if ( !upper(up[a][i] , b) ) a = up[a][i] ;
		return up[a][0] ;
	}
	
	void solve(){
		
		cin >> n >> m >> q ;
		while ( ( 1 << l ) <= n ) l ++ ;
		for ( int i = 0 ; i <= n ; i ++ ) up[i].resize(n) ;
		for ( int i = 0 ; i < n - 1 ; i ++ ){
			int x , y ;
			cin >> x >> y ;
			g[x].push_back(y) ;
			g[y].push_back(x) ;
		}
		for ( int i = 1 ; i <= m ; i ++ ){ cin >> a[i] ; st[a[i]].insert(i) ;}
		dfs(1) ;
		for ( int i = 2 ; i <= m ; i ++ )
			par[lca(a[i],a[i-1])].insert(i-1) ;
		
		while ( q -- ){
			int tt ;
			cin >> tt ;
			if ( tt == 1 ){
				int ind , val ;
				cin >> ind >> val ;
				st[a[ind]].erase(st[a[ind]].find(ind)) ;
				st[val].insert(ind) ;
				if ( ind > 1 ){
					par[lca(a[ind],a[ind-1])].erase(ind-1) ;
					par[lca(val,a[ind-1])].insert(ind-1) ;
				}
				if ( ind < m ){
					par[lca(a[ind],a[ind+1])].erase(ind+1) ;
					par[lca(val,a[ind+1])].insert(ind+1) ;
				}
				a[ind] = val ;
			}
			else{
				int l , r , v ;
				cin >> l >> r >> v ;
				auto f = st[v].lower_bound(l) ;
				if ( f != st[v].end() && *f <= r ){
					cout << *f << ' ' << *f << endl ;
					continue ;
				}
				f = par[v].lower_bound(l) ;
				if ( f != par[v].end() && *f < r )
					cout << *f << ' ' << *f+1 << endl ;
				else cout << "-1 -1\n" ;
			}
		}
	}
	 
	signed main(){
	//  fopn("blocks") ;
	    Scaramouche ;
	    int t = 1 ;
	//      cin >> t ;
	    while ( t -- ) solve() ; 
	}

Compilation message

treearray.cpp: In function 'void fopn(std::string)':
treearray.cpp:5:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    5 |  void fopn(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
      |                         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
treearray.cpp:5:73: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    5 |  void fopn(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
      |                                                                  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 28436 KB n=5
2 Correct 15 ms 28616 KB n=100
3 Incorrect 15 ms 28568 KB Wrong range.
4 Halted 0 ms 0 KB -

Subtask #2
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 28436 KB n=5
2 Correct 15 ms 28616 KB n=100
3 Incorrect 15 ms 28568 KB Wrong range.
4 Halted 0 ms 0 KB -

Subtask #3
0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 28436 KB n=5
2 Correct 15 ms 28616 KB n=100
3 Incorrect 15 ms 28568 KB Wrong range.
4 Halted 0 ms 0 KB -

Subtask #4
0 / 44.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 28436 KB n=5
2 Correct 15 ms 28616 KB n=100
3 Incorrect 15 ms 28568 KB Wrong range.
4 Halted 0 ms 0 KB -