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Cod sursa(job #7451)
#include <stdio.h>
#include <string.h>
#define MAX_S 1<<16
#define FIN "1-sir.in"
#define FOUT "1-sir.out"
#define MOD 194767
int N, S, A[MAX_S], B[MAX_S];
int main(void)
{
int i, j, X;
freopen(FIN, "r", stdin);
freopen(FOUT, "w", stdout);
scanf("%d %d", &N, &S);
X = N*(N-1)/2;
if (S < -X || S > X) { printf("0\n"); return 0; }
S += X;
A[X] = 1;
for (i = 1; i < N; i++)
{
for (j = 0; j <= 2*X; j++)
{
B[j] = (j+i<=2*X)*A[j+i] + (j-i>=0)*A[j-i];
while (B[j] >= MOD) B[j] -= MOD;
}
memcpy(A, B, (2*X+1)*sizeof(int));
}
printf("%d\n", A[S]);
return 0;
}