ModInt.code-snippets

{
	"ModInt": {
		"prefix": "ModInt",
		"body": [
		  "template < int MOD = 1000000007 > struct ModInt {",
		  "",
		  "    int val;",
		  "",
		  "    ModInt(int V = 0) : val(V) { val %= MOD; }",
		  "",
		  "    ModInt& operator += (const ModInt& rhs) {",
		  "        if ((val += rhs.val) >= MOD) val -= MOD;",
		  "        return *this;",
		  "    }",
		  "    ModInt& operator += (const int rhs) {",
		  "        if ((val += rhs) >= MOD) val -= MOD;",
		  "        return *this;",
		  "    }",
		  "",
		  "    ModInt& operator -= (const ModInt& rhs) { ",
		  "        if ((val += MOD - rhs.val) >= MOD) val -= MOD; ",
		  "        return *this; ",
		  "    }",
		  "    ModInt& operator -= (const int rhs) { ",
		  "        if ((val += MOD - rhs) >= MOD) val -= MOD; ",
		  "        return *this; ",
		  "    }",
		  "",
		  "    ModInt& operator *= (const ModInt& rhs) { val = (1ll * val * rhs.val) % MOD; return *this; }",
		  "    ModInt& operator *= (const int rhs) { val = (1ll * val * rhs) % MOD; return *this; }",
		  "",
		  "    ModInt& operator /= (const ModInt& rhs) { return *this *= rhs.inverse(); }",
		  "    ModInt& operator /= (const int rhs) { return *this *= ModInt(rhs).inverse(); }",
		  "",
		  "    ModInt& operator %= (const ModInt& rhs) { val %= rhs.val; return *this; }",
		  "    ModInt& operator %= (const int rhs) { val %= rhs; return *this; }",
		  "",
		  "    ModInt& operator ++() { return *this += 1; }",
		  "    ModInt& operator --() { return *this -= 1; }",
		  " ",
		  "    ModInt operator ++(int unused) { ModInt res(*this); ++*this; return res; }",
		  "    ModInt operator --(int unused) { ModInt res(*this); --*this; return res; }",
		  "    ",
		  "    ModInt operator + (const ModInt& rhs) const { ModInt res(*this); return res += rhs; }",
		  "    ModInt operator + (const int rhs) const { ModInt res(*this); return res += rhs; }",
		  "",
		  "    ModInt operator % (const ModInt& rhs) const { ModInt res(*this); return res %= rhs; }",
		  "    ModInt operator % (const int rhs) const { ModInt res(*this); return res %= rhs; }",
		  "",
		  "    ModInt operator - (const ModInt& rhs) const { ModInt res(*this); return res -= rhs; }",
		  "    ModInt operator - (const int rhs) const { ModInt res(*this); return res -= rhs; }",
		  "",
		  "    ModInt operator * (const ModInt& rhs) const { ModInt res(*this); return res *= rhs; }",
		  "    ModInt operator * (const int rhs) const { ModInt res(*this); return res *= rhs; }",
		  "",
		  "    ModInt operator / (const ModInt& rhs) const { ModInt res(*this); return res /= rhs; }",
		  "    ModInt operator / (const int rhs) const { ModInt res(*this); return res /= rhs; }",
		  "",
		  "    ModInt& operator = (const ModInt& rhs) { val = rhs.val; return *this; }",
		  "    ModInt& operator = (const int rhs) { val = rhs; return *this; }",
		  "",
		  "    bool operator == (const ModInt& rhs) const { return val == rhs.val; }",
		  "    bool operator == (const int rhs) const { return val == rhs; }",
		  "",
		  "    bool operator != (const ModInt& rhs) const { return val != rhs.val; }",
		  "    bool operator != (const int rhs) const { return val != rhs; }",
		  "",
		  "    bool operator < (const ModInt& rhs) const { return val < rhs.val; }",
		  "    bool operator < (const int rhs) const { return val < rhs; }",
		  "",
		  "    bool operator <= (const ModInt& rhs) const { return val <= rhs.val; }",
		  "    bool operator <= (const int rhs) const { return val <= rhs; }",
		  "",
		  "    bool operator > (const ModInt& rhs) const { return val > rhs.val; }",
		  "    bool operator > (const int rhs) const { return val > rhs; }",
		  "",
		  "    bool operator >= (const ModInt& rhs) const { return val >= rhs.val; }",
		  "    bool operator >= (const int rhs) const { return val >= rhs; }",
		  "",
		  "    int operator () () const { return val; }",
		  "",
		  "    ModInt inverse() const { return power(MOD - 2); }",
		  "",
		  "    ModInt power(ll n) const {",
		  "        ModInt a = *this, res = 1;",
		  "        while (n > 0) {",
		  "            if (n & 1) res *= a;",
		  "            a *= a, n >>= 1;",
		  "        }",
		  "        return res;",
		  "    }",
		  "",
		  "    ModInt power(ModInt n) const {",
		  "        ModInt a = *this, res = 1;",
		  "        int e = n();",
		  "        while (e > 0) {",
		  "            if (e & 1) res *= a;",
		  "            a *= a, e >>= 1;",
		  "        }",
		  "        return res;",
		  "    }",
		  "",
		  "    friend ModInt operator ^ (ModInt rhs, ll n) { return rhs.power(n); }",
		  "    friend ModInt operator ^ (ModInt rhs, ModInt n) { return rhs.power(n); }",
		  "",
		  "    friend std::istream& operator>>(std::istream& is, ModInt& x) noexcept { return is >> x.val; }",
		  "    friend std::ostream& operator<<(std::ostream& os, const ModInt& x) noexcept { return os << x.val; }",
		  "",
		  "};",
		  "using Mint = ModInt < 998244353 >;"
		],
		"description": "ModInt"
	}
}