#include #include #include using namespace std; //----------------------- const int MOD = (int)1e9 + 7; struct mint { int n; mint(int n = 0) : n(n) { } }; mint operator+(mint a, mint b) { return (a.n += b.n) >= MOD ? a.n - MOD : a.n; } mint operator-(mint a, mint b) { return (a.n -= b.n) < 0 ? a.n + MOD : a.n; } mint operator*(mint a, mint b) { return 1LL * a.n * b.n % MOD; } mint &operator+=(mint &a, mint b) { return a = a + b; } mint &operator-=(mint &a, mint b) { return a = a - b; } mint &operator*=(mint &a, mint b) { return a = a * b; } ostream &operator<<(ostream &os, mint a) { return os << a.n; } istream &operator>>(istream &is, mint& a) { return is >> a.n; } mint modpow(mint a, long long n) { mint r = 1; while (n) { if (n & 1) r *= a; a *= a; n >>= 1; } return r; } mint modinv(mint x) { long long a = x.n, b = MOD, u = 1, v = 0; while (b) { long long t = a/b; swap((a -= t*b), b); swap((u -= t*v), v); } return mint(u); } //----------------------- template ostream& operator<<(ostream& os, const vector& vec) { for (auto &vi: vec) os << vi << " "; return os; } template struct Matrix { vector> val; Matrix(int n = 1, int m = 1, T x = 0) { val.assign(n, vector(m, x)); } size_t size() const { return val.size(); } vector& operator[](int i) { return val[i]; } const vector& operator[](int i) const { return val[i]; } friend ostream& operator<<(ostream& os, const Matrix M) { for (int i = 0; i < M.size(); ++i) os << M[i] << " \n"[i != M.size() - 1]; return os; } }; template Matrix operator*(const Matrix& A, const Matrix& B) { Matrix R(A.size(), B[0].size()); for (int i = 0; i < A.size(); ++i) for (int j = 0; j < B[0].size(); ++j) for (int k = 0; k < B.size(); ++k) R[i][j] += A[i][k] * B[k][j]; return R; } template Matrix operator^(Matrix A, long long n) { Matrix R(A.size(), A.size()); for (int i = 0; i < A.size(); ++i) R[i][i] = 1; while (n > 0) { if (n & 1) R = R * A; A = A * A; n >>= 1; } return R; } template Matrix operator+(const Matrix &A, const Matrix &B) { Matrix R(A.size(), A[0].size()); for (int i = 0; i < A.size(); ++i) for (int j = 0; j < A[0].size(); ++j) R[i][j] = A[i][j] + B[i][j]; return R; } long long modpow(long long a, long long n, long long mod) { long long res = 1; while (n > 0) { if (n & 1) (res *= a) %= mod; (a *= a) %= mod; n >>= 1; } return res; } long long modstr(const string &s, long long mod) { long long a = 0; for (auto &c: s) a = (c - '0' + a * 10) % mod; return a; } int main() { int n; cin >> n; mint res = 1; Matrix fib(2, 2); fib[0][0] = fib[0][1] = fib[1][0] = 1; while (n--) { long long c; string d; cin >> c >> d; int nc = (c + 1) % (MOD - 1); res *= modpow((fib ^ nc)[0][0], modstr(d, MOD - 1)); } cout << res << endl; return 0; }