Cod sursa(job #555568)
Utilizator | zloteanu adrian nichita zloteanu.adrian | Data | 15 martie 2011 16:51:15 |
---|---|---|---|
Problema | 1-sir | Scor | 100 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.35 kb |
#include<fstream>
using namespace std;
ifstream q("1-sir.in");
ofstream w("1-sir.out");
int n,s,b,v[65536];
int main()
{int i,j;
q>>n>>s;
s=s<0?-s:s;
b=n*(n-1)/2;
if(b<s||(b&1)!=(s&1))
{w<<"0\n";
return 0;}
s=(b-s)/2;
v[0]=1;
for(i=1;i<n;++i)
for(j=s-i;j>=0;--j)
{v[j+i]+=v[j];
if(v[j+i]>194767)
v[j+i]-=194767;}
w<<v[s];
return 0;}