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Cod sursa(job #166197)
#include <iostream>
#define MOD 9901
using namespace std;
int N, K;
int logpow(int A, int B) {
int R(1);
for (int i = 1 << 30; i > 0; i >>= 1) {
R = (R * R) % MOD;
if (i & B)
R = (R * A) % MOD;
}
return R;
}
int progresie(int p, int q) {
int a = (logpow(p, q+1) - 1 + MOD) % MOD;
int b = p - 1;
int c;
for (c = 1; c <= MOD; ++c)
if ((c * b) % MOD == a)
break;
return c % MOD;
}
int main(int argc, char *argv[]) {
FILE *fi = fopen("sumadiv.in", "r");
fscanf(fi, "%d %d", &N, &K);
fclose(fi);
int S(0);
int d(2);
while (d*d <= N) {
if (N % d == 0) {
int p;
for (p = 0; N % d == 0; ++p)
N /= d;
S = (S + progresie(d % MOD, K*p)) % MOD;
}
++d;
}
if (N > 1)
S = (S + progresie(N % MOD, K)) % MOD;
FILE *fo = fopen("sumadiv.out", "w");
fprintf(fo, "%d\n", S);
fclose(fo);
return 0;
}