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Cod sursa(job #575475)
#include<fstream.h>
#include<algorithm>
ifstream f("loto.in");
ofstream g("loto.out");
struct form{int a,b,c;} v1[1000005];
int n,q,v[1000005],s[105],ii,jj,ok,st,dr,mij,tz,nr,w;
int cauta(int a, int &jj)
{
st=1; dr=nr;
while(st<=dr)
{ mij=(st+dr)/2;
if(v[mij]==a) {jj=mij;return 1;}
if(v[mij]<a) st=mij+1;
else dr=mij-1;
}
return 0;
}
int main()
{
int i,j,k;
f>>n>>q;
for(i=1;i<=n;++i) f>>s[i];
std::sort(s+1,s+n+1);
for(i=1;i<=n;++i)
for(j=i;j<=n;++j)
for(k=j;k<=n;++k)
{ v[++nr]=s[i]+s[j]+s[k];
v1[nr].a=s[i];
v1[nr].b=s[j];
v1[nr].c=s[k];
}
w=1;
while(v[w]+v[nr]<q) ++w;
tz=nr;
while(2*v[tz]>q) --tz;
++tz;
for(i=w;i<tz&&!ok;++i)
if(cauta(q-v[i],jj)) ok=1,ii=i;
if(ok) g<<v1[ii].a<<' '<<v1[ii].b<<' '<<v1[ii].c<<' '<<v1[jj].a<<' '<<v1[jj].b<<' '<<v1[jj].c<<'\n';
else g<<-1<<'\n';
f.close(); g.close();
return 0;
}