Cod sursa(job #965556)

Utilizator dragangabrielDragan Andrei Gabriel dragangabriel Data 24 iunie 2013 10:23:36
Problema Semne Scor 75
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.72 kb
#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<ctime>
#include<algorithm>
using namespace std;
int n,i,j,k,x,y,v[50001];
char semn[50001];
long long sum,s;

int main()
{
	freopen("semne.in","r",stdin);
	freopen("semne.out","w",stdout);
	srand(time(0));
	scanf("%d",&n);
	scanf("%lld",&s);
	for (i=1;i<=n;i++)
	{
		scanf("%d",&v[i]);
		if (sum<s) sum=sum+v[i],semn[i]='+';else
			sum=sum-v[i],semn[i]='-';
	}
	while (sum!=s)
	{
		x=rand()%n+1;
		if (sum<s)
		{
			while (semn[x]!='-') x=rand()%n+1;
			sum=sum+2*v[x];
			semn[x]='+';
		}else
		{
			while (semn[x]!='+') x=rand()%n+1;
			sum=sum-2*v[x];
			semn[x]='-';
		}
	}
	for (i=1;i<=n;i++) printf("%c",semn[i]);
	return 0;
}