Cod sursa(job #2567162)

Utilizator petrisorvmyVamanu Petru Gabriel petrisorvmy Data 3 martie 2020 15:33:54
Problema Stramosi Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 1 kb
#include <bits/stdc++.h>
#define FILE_NAME "stramosi"
#define fast ios_base :: sync_with_stdio(0); cin.tie(0);
#pragma GCC optimize("O3")
#define NMAX 250010
using namespace std;

ifstream f(FILE_NAME ".in");
ofstream g(FILE_NAME ".out");

typedef long long ll;
typedef long double ld;
typedef pair<ll,ll> pi;
typedef pair<ld,ld> pct;

const ll inf = 1LL << 60;
const ll mod = 1e9 + 7;
const ld eps = 1e-9;


void add(ll &a , ll b)
{
    a += b;
    a %= mod;
}

void sub(ll &a, ll b)
{
    a = (a - b + mod) % mod;
}

int n, m, pd[20][NMAX], x, y;

int main()
{
    f >> n >> m;
    for(int i = 1; i <= n; ++i)
        f >> pd[0][i];
    for(int i = 1; i <= 18; ++i)
        for(int j = 1; j <= n; ++j)
            pd[i][j] = pd[ i - 1 ][ pd[i - 1][j] ];
    while(m--)
    {
        f >> x >> y;
        for(int i = 0; i <= 18; ++i)
            if(y & (1 << i))
                x = pd[i][x];
        g << x << '\n';
    }
    f.close();
    g.close();
    return 0;
}