Cod sursa(job #229683)
Utilizator | Data | 11 decembrie 2008 09:31:38 | |
---|---|---|---|
Problema | Stramosi | Scor | 100 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.62 kb |
#include<fstream.h>
#include<math.h>
long int v[18][250001];
int main()
{
long int j,p,i,q,m,n,nr=0,x;
ifstream f("stramosi.in");
ofstream g("stramosi.out");
f>>n>>m;
for(i=1; i<=n; ++i)
f>>v[0][i];
for(i=1;i<=17;++i)
for(j=1;j<=n;++j)
v[i][j]=v[i-1][v[i-1][j]];
for(i=1;i<=m;++i)
{f>>q>>p;
x=pow(2,17);
for(j=17;x>p;--j, x/=2);
nr=x;
q=v[j][q];
while(nr<p && q!=0)
{for(;x>p-nr;--j, x/=2);
nr+=x;
q=v[j][q];
}
g<<q<<"\n";}
f.close();
g.close();
return 0;
}