Submission #172481

#	Time	Username	Problem	Language	Result	Execution time	Memory
172481		youssefbou62	Crayfish scrivener (IOI12_scrivener)	C++14	12 / 100	780 ms	1400 KiB

scrivener

#include  <bits/stdc++.h>

using namespace std;

#define mp make_pair
#define fi first
#define se second
#define all(v) v.begin(),v.end()
#define allarr(a) a , a + n
#define ll long long
#define ull unsigned long long 
#define pb push_back
#define fastio ios_base::sync_with_stdio(false) ; cin.tie(NULL); cout.tie(NULL)
typedef pair<int, int> pi;
typedef pair<ll,ll> pll; 
typedef pair<int,pi> trp ;
typedef vector<pi> vpi;
typedef vector<pll> vpll ;
// int ab  (int  x ) { return (x>0?x:-x); }
//
string s = "" ; 
vector<int> adj[5005] ; 
int cnt = 0 ;
bool isleaf[5005] ;
char leter[5005] ;   
void Init(){

}
void dfs ( int u , int d ){
	
	if( isleaf [u] ){
		if( d % 2 == 0){
			s.pop_back() ; 
		}

		else{
			s += leter[u] ; 
		}
		return ; 
	}

	for(int v : adj[u]){
		dfs(v,d+1) ; 
	}
}
void UndoCommands(int U)
{
	for(int i = cnt - U ; i < cnt ; i++ ){
		adj[cnt].pb(i) ;
	}
	for(int i  = cnt - 1 , j = 0 ; j < U; i-- , j++ ){
		dfs(i,0); 
	}
	cnt ++ ; 

}
void TypeLetter(char L){
	s+=L; 
	isleaf[cnt]=1; 
	leter [cnt] = L ; 
	cnt ++ ; 
}

char GetLetter(int P)
{
	// cout << s[P] << endl; 
	return s[P] ; 
}



// int main(){
// 	Init();
// 	TypeLetter('a');TypeLetter('b');
// 	GetLetter(1);
// 	TypeLetter('d');
// 	UndoCommands(2);
// 	UndoCommands(1);
// 	GetLetter(2);
// 	TypeLetter('e');
// 	UndoCommands(1);
// 	UndoCommands(5);
// 	TypeLetter('c'); 
// 	GetLetter(2); 
// 	UndoCommands(2); GetLetter(2); 
// }

• Subtask 1: 5 / 5
• Subtask 2: 7 / 7
• Subtask 3: 0 / 22
• Subtask 4: 0 / 26
• Subtask 5: 0 / 40