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Cod sursa(job #784076)
#include <fstream>
#include <string.h>
#define MOD 10000
#define DIM 21*21*21*21
using namespace std;
int V[DIM];
int W[DIM];
int *P = V + (DIM/2);
int *Q = W + (DIM/2);
int N, M, i, j, k, t, v, minim, maxim, X;
int main() {
ifstream f("diamant.in");
ofstream g("diamant.out");
f>>N>>M>>X;
P[0] = 1;
for (i=1;i<=N;i++)
for (j=1;j<=M;j++){
for (t=minim;t<=maxim;t++)
if (P[t]) {
v = i*j;
Q[t]+=P[t];
Q[t+v]+=P[t];
Q[t-v]+=P[t];
if (Q[t] >= MOD)
Q[t] -= MOD;
if (Q[t+v] >= MOD)
Q[t+v] -= MOD;
if (Q[t-v] >= MOD)
Q[t-v] -= MOD;
if (t+v > maxim)
maxim = t+v;
if (t-v < minim)
minim = t-v;
}
memcpy(V, W, sizeof(V));
memset(W, 0, sizeof(W));
}
if (X > DIM/2 || X < -DIM/2)
g<<0;
else
g<<P[X];
return 0;
}