Cod sursa(job #83096)
/*
100 p
*/
#include<stdio.h>
#include<math.h>
#include<iostream>
#include<stdlib.h>
long long s, v[50002], n, semn[50002], suma, minus[50000], plus[50002], a, b;
int main()
{
freopen("semne.in","r",stdin);
freopen("semne.out","w",stdout);
scanf("%lld %lld", &n, &s);
srand(time(0));
long long i, x;
for (i=1; i<=n; i++) scanf("%lld",&v[i]);
for(i=1; i<=n; i++)
{
if (suma+v[i]<=s)
{
plus[++a]=i;
suma+=v[i];
semn[i]++;
}
else
{
minus[++b]=i;
suma-=v[i];
semn[i]--;
}
}
srand(time(0));
while (suma!=s)
{
if (suma>s)
{ x=(rand()%a)+1;
suma-=(v[plus[x]]<<1);
semn[plus[x]]--;
minus[++b]=plus[x];
plus[x]=plus[a--];
}
else
{ x=(rand()%b)+1;
suma+=(v[minus[x]]<<1);
plus[++a]=minus[x];
semn[minus[x]]++;
minus[x]=minus[b--];
}
}
for (i=1; i<=n; i++)
if (semn[i])
printf("+");
else printf("-");
return 0;
}