Cod sursa(job #2264280)
Utilizator | Piscu Stefan Constantin Stefan_Piscu | Data | 19 octombrie 2018 23:08:47 |
---|---|---|---|
Problema | 1-sir | Scor | 0 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva de probleme | Marime | 0.49 kb |
#include <fstream>
using namespace std;
ifstream fin("1-sir.in");
ofstream fout("1-sir.out");
int modul(int x)
{
return max(x, -x);
}
int d[2][45000], n, s;
int main()
{
fin>>n>>s;
if(s<0) s=-s;
if(s>n*(n-1)) {fout<<"0\n"; return 0;}
d[1][0]=1;
bool b=1;
for(int j=2;j<=n;++j)
{
for(int i=0;i<=s;++i)
d[!b][i]=d[b][modul(i-(j-1))]+d[0][i+(j-1)], d[!b][i]%=194767;
b=!b;
}
fout<<d[b][s];
return 0;
}