oj.uz

Submission #672465

# Submission time Handle Problem Language Result Execution time Memory
672465 2022-12-16T10:08:04 Z Cutebol Birthday gift (IZhO18_treearray) C++17
0 / 100
 15 ms 28508 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 = 1 ; 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:5:31: 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:5:72: 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 14 ms 28500 KB n=5
2 Correct 15 ms 28500 KB n=100
3 Incorrect 14 ms 28508 KB Wrong range.
4 Halted 0 ms 0 KB -

Subtask #2
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 28500 KB n=5
2 Correct 15 ms 28500 KB n=100
3 Incorrect 14 ms 28508 KB Wrong range.
4 Halted 0 ms 0 KB -

Subtask #3
0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 28500 KB n=5
2 Correct 15 ms 28500 KB n=100
3 Incorrect 14 ms 28508 KB Wrong range.
4 Halted 0 ms 0 KB -

Subtask #4
0 / 44.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 28500 KB n=5
2 Correct 15 ms 28500 KB n=100
3 Incorrect 14 ms 28508 KB Wrong range.
4 Halted 0 ms 0 KB -