Cod sursa(job #802003)

Utilizator Marius96Marius Gavrilescu Marius96 Data 25 octombrie 2012 17:13:12
Problema Semne Scor 60
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.55 kb
#include<cstdio>
#include<cstdlib>
#include<ctime>
int v[50005];
bool p[50005];

int n;

int randn()
{
	return ((rand()>>16)+rand())%n;
}

int main()
{
	srand (time (NULL));
	freopen ("semne.in","r",stdin);
	freopen ("semne.out","w",stdout);

	long long s,c=0;
	scanf ("%d%lld",&n,&s);
	for(int i=0;i<n;i++){
		scanf ("%d",v+i);
		if(c<s)
			c+=v[i],p[i]=1;
		else
			c-=v[i],p[i]=0;
	}

	while(s!=c){
		int r=randn();
		if(c<s&&!p[r])
			c+=v[r]*2,p[r]=1;
		else if(c>s&&p[r])
			c-=v[r]*2,p[r]=0;
	}

	for(int i=0;i<n;i++)
		putchar (p[i]?'+':'-');

	return 0;
}