#include <cstdio>
long long precalc[11][3] =
{
{2, 0, 0}, //3
{16, 0, 0}, //4
{100, 4, 0}, //5
{616, 72, 0}, //6
{4024, 952, 0}, //7
{28512, 11680, 0}, //8
{219664, 142800, 160}, //9
{1831712, 1788896, 7680}, //10
{16429152, 23252832, 233792}, //11
{157552000, 315549312, 5898240}, //12
{1606874944, 4483860928LL, 136280832}, //13
};
int main()
{
int n, k, p;
scanf("%d %d %d", &n, &k, &p);
int pot = 1;
int wykladnik = 0;
while (pot < n)
{
pot *= 2;
wykladnik++;
}
if (k > wykladnik)
{
printf("0\n");
return 0;
}
if (k == 1)
{
long long r = 1;
for (int i = 0; i < n - 1; i++)
{
r *= 2;
r %= p;
}
printf("%lld\n", r);
return 0;
}
if (n <= 13)
{
printf("%lld\n", precalc[n - 3][k - 2] % p);
}
else
{
printf("0\n");
}
return 0;
}
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 | #include <cstdio> long long precalc[11][3] = { {2, 0, 0}, //3 {16, 0, 0}, //4 {100, 4, 0}, //5 {616, 72, 0}, //6 {4024, 952, 0}, //7 {28512, 11680, 0}, //8 {219664, 142800, 160}, //9 {1831712, 1788896, 7680}, //10 {16429152, 23252832, 233792}, //11 {157552000, 315549312, 5898240}, //12 {1606874944, 4483860928LL, 136280832}, //13 }; int main() { int n, k, p; scanf("%d %d %d", &n, &k, &p); int pot = 1; int wykladnik = 0; while (pot < n) { pot *= 2; wykladnik++; } if (k > wykladnik) { printf("0\n"); return 0; } if (k == 1) { long long r = 1; for (int i = 0; i < n - 1; i++) { r *= 2; r %= p; } printf("%lld\n", r); return 0; } if (n <= 13) { printf("%lld\n", precalc[n - 3][k - 2] % p); } else { printf("0\n"); } return 0; } |
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