Cod sursa(job #379421)

Utilizator alexandru92alexandru alexandru92 Data 1 ianuarie 2010 18:53:18
Problema Loto Scor 25
Compilator cpp Status done
Runda Arhiva de probleme Marime 1.4 kb
/* 
 * File:   main.cpp
 * Author: virtualdemon
 *
 * Created on January 1, 2010, 5:35 PM
 */
#include <vector>
#include <fstream>
#include <iterator>
#include <algorithm>
#define pb push_back

/*
 *
 */
using namespace std;
struct vertex
{
    int s, a, b, c;
}x;
inline ostream& operator<<( ostream& out, vertex z )
{
    out<<z.a<<' '<<z.b<<' '<<z.c<<' ';
    return out;
}
vector< int > number;
vector< vertex > v;
int main()
{int n, S, sum, i, j, k, left, right, middle, key;
    ifstream in("loto.in");
    in>>n>>S;
    number.resize(n);
    for( i=0; i < n; ++i )
        in>>number[i];
    sort( number.begin(), number.end() );
    for( i=0; i < n; ++i )
        for( j=0; j < n; ++j )
            for( k=0; k < n; ++k )
            {
                x.s=number[i]+number[j]+number[k];
                x.a=number[i];  x.b=number[j];  x.c=number[k];
                v.pb(x);
            }
    n=v.size();
    for( i=0; i < n ;++i )
    {key=v[i].s;
        left=0; right=n-1;
        while( left <= right )
        {
            middle=left+(right-left)/2;
            sum=key+v[middle].s;
            if( S == sum )
            {
                ofstream out("loto.out");
                out<<v[i]<<' '<<v[middle];
                return 0;
            }
            if( S > sum )
                left=middle+1;
            else right=middle-1;
        }
    }
    ofstream out("loto.out");
    out<<"-1";
    return 0;
}