Cod sursa(job #426225)

Utilizator mihai995mihai995 mihai995 Data 26 martie 2010 17:05:32
Problema Loto Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 1.06 kb
#include <fstream>
#include <algorithm>
using namespace std;
int n,s,v[101],a[171701];
ifstream in("loto.in");
ofstream out("loto.out");

bool comp (int a,int b)
{
	return a<b;
}

void exe(int c) 
{
	int i,j,k;
    for (i=1;i<=n;i++) 
        for (j=i;j<=n;j++) 
            for (k=j;k<=n;k++) 
                if (v[i]+v[j]+v[k]==c) 
				{
                    out<<v[i]<<" "<<v[j]<<" "<<v[k]<<" ";
                    return;
                }
}

bool bsearch(int m)
{
    int i,step=1<<22,sum=s-a[m];
    for (i=0;step;step>>=1) 
        if (i+step<=v[0] && a[i+step]<=sum) i+=step;
    if (a[i]==sum)
	{
        exe(a[i]);
        exe(a[m]);
        return true;
    }
    return false;
}

int main () 
{
    int i,j,k;
	in>>n>>s;
    for (i=1;i<=n;i++)
        in>>v[i];
    for (i=1;i<=n;i++) 
        for (j=i;j<=n;j++)
            for (k=j;k<=n;k++) 
                a[++v[0]]=v[i]+v[j]+v[k];     
	sort(a+1,a+v[0]+1,comp);
    for (i=1;i<=v[0];i++)
        if (bsearch(i)) return 0;
    out<<"-1\n";     
    return 0;
}