Update numtheory.cpp

Changes

1 changed files (+7/-7)

• Math/numtheory.cpp
  • @@ -1,19 +1,19 @@
    constexpr ll MOD = 1e9+7; - int fact[200002] = { 1 }, ifact[200002] = { 1 }; + ll fact[200002] = { 1 }, ifact[200002] = { 1 }; - int pw(int base, int exp) { - int res = 1; + ll pw(ll base, ll exp) { + ll res = 1; while (exp) { - if (exp & 1) res = (ll)base * res % MOD; - exp >>= 1, base = (ll)base * base % MOD; + if (exp & 1) (res *= base) %= MOD; + exp >>= 1, (base *= base) %= MOD; } return res; } - int inv(int x) { return pw(x, MOD - 2); } + ll inv(ll x) { return pw(x, MOD - 2); } - int nCr(int n, int k) { return (ll)fact[n] * ifact[k] % MOD * ifact[n - k] % MOD; } + ll nCr(int n, int k) { return fact[n] * ifact[k] % MOD * ifact[n - k] % MOD; } for (int i = 0; i < N; ++i) { fact[i + 1] = (i + 1ll) * fact[i] % MOD;