func_code_string: #include <bits/stdc++.h>   template <typename T>   inline void read(T &x) {     x = 0;     char c = getchar();     bool flag = false;     while (!isdigit(c)) {       if (c ==  - ) flag = true;       c = getchar();     }     while (isdigit(c)) x = x * 10 + (c ^ 48), c = getchar();     if (flag) x = -x;   }   using namespace std;   const int P = 1e9 + 7;   const int inv2 = (P + 1) / 2;   inline long long quickpow(long long x, long long k) {     long long res = 1;     x %= P;     while (k) {       if (k & 1) res = res * x % P;       x = x * x % P;       k >>= 1;     }     return res;   }   int k;   long long s[230][230], tri[230][230], jie[230], jieni[230];   inline void init() {     s[0][0] = 1;     for (int i = 1; i <= k; ++i)       for (int j = 1; j <= i; ++j)         s[i][j] = (s[i - 1][j - 1] + s[i - 1][j] * (i - 1)) % P;     tri[1][1] = 1;     for (int i = 2; i <= k + 1; ++i)       for (int j = 1; j <= i; ++j)         tri[i][j] = (tri[i - 1][j - 1] + tri[i - 1][j]) % P;     jie[0] = jieni[0] = 1;     for (int i = 1; i <= k; ++i) jie[i] = jie[i - 1] * i % P;     jieni[k] = quickpow(jie[k], P - 2);     for (int i = k - 1; i; --i) jieni[i] = jieni[i + 1] * (i + 1) % P;   }   inline long long get_c(int n, int m) {     if (n < 0 || m < 0 || n - m < 0) return 0;     return tri[n + 1][m + 1];   }   struct Complex {     long long a, b;     Complex() { a = 0, b = 0; }     Complex(long long jzp, long long zzz) { a = jzp, b = zzz; }   } phi, phihat;   inline Complex operator+(const Complex &a, const Complex &b) {     return Complex((a.a + b.a) % P, (a.b + b.b) % P);   }   inline Complex operator-(const Complex &a, const Complex &b) {     return Complex((a.a - b.a) % P, (a.b - b.b) % P);   }   inline Complex operator*(const Complex &a, const Complex &b) {     return Complex((a.a * b.a + 5 * a.b * b.b) % P, (a.a * b.b + a.b * b.a) % P);   }   inline Complex get_inv(Complex x) {     long long a = x.a, b = x.b;     if (!b) return Complex(quickpow(a, P - 2), 0);     long long d = b * quickpow((5ll * b * b - a * a) % P, P - 2) % P;     long long c = -a * quickpow(b, P - 2) % P * d % P;     Complex res = Complex(c, d);     return res;   }   inline Complex Pow(Complex x, long long k) {     Complex res(1, 0);     while (k) {       if (k & 1) res = res * x;       x = x * x;       k >>= 1;     }     return res;   }   inline long long work(long long n) {     Complex ans;     for (int j = 0; j <= k; ++j) {       Complex res;       for (int d = 0; d <= j; ++d) {         Complex A = Pow(phi, d) * Pow(phihat, j - d);         if (A.a == 1 && A.b == 0) {           if ((j - d) & 1)             res = res - Complex(n % P * get_c(j, d) % P, 0);           else             res = res + Complex(n % P * get_c(j, d) % P, 0);         }         A = A * (Complex(1, 0) - Pow(A, n)) * get_inv(Complex(1, 0) - A);         if ((j - d) & 1)           res = res - Complex(get_c(j, d), 0) * A;         else           res = res + Complex(get_c(j, d), 0) * A;       }       if ((k - j) & 1)         ans = ans - Complex(s[k][j], 0) * Pow(get_inv(Complex(0, 1)), j) * res;       else         ans = ans + Complex(s[k][j], 0) * Pow(get_inv(Complex(0, 1)), j) * res;     }     ans = ans * Complex(jieni[k], 0);     if (ans.b) puts( wawa );     return ans.a;   }   int main() {     phi = Complex(inv2, inv2);     phihat = Complex(inv2, P - inv2);     read(k);     init();     long long l, r;     read(l), read(r);     l += 2;     r += 2;     long long ans = work(r) - work(l - 1);     printf( %lld n , (ans % P + P) % P);     return 0;   }   