func_code_string: #include <bits/stdc++.h>   using namespace std;   const int bignumlen = 2200;   const int Blen = 8;   const long long base = 100000000;   struct bignum {     int len;     long long data[bignumlen];     long long &operator[](int x) { return (data[x]); }     const long long &operator[](int x) const { return (data[x]); }     bignum() {       memset(data, 0, sizeof(data));       len = 0;     }     void clear() {       for (int i = len; i >= 1; --i) data[i] = 0;       len = 0;     }     int check(const bignum &a, const bignum &b) {       if (a.len > b.len) return (0);       if (b.len > a.len) return (1);       for (int i = a.len; i >= 1; --i) {         if (a.data[i] < b.data[i]) return (1);         if (b.data[i] < a.data[i]) return (0);       }       return 2;     }     bool operator<(const bignum &b) { return (check(*this, b) == 1); }     bool operator>(const bignum &b) { return (check(*this, b) == 0); }     bool operator<=(const bignum &b) { return (check(*this, b) >= 1); }     bool operator>=(const bignum &b) { return (check(*this, b) % 2 == 0); }     bool operator!=(const bignum &b) { return (check(*this, b) != 2); }     bool operator==(const bignum &b) { return (check(*this, b) == 2); }     bignum operator=(const bignum &x) {       for (int i = x.len + 1; i <= len; ++i) data[i] = 0;       for (int i = 1; i <= x.len; ++i) data[i] = x.data[i];       len = x.len;       return *this;     }     bignum operator=(long long x) {       for (int i = len; i >= 0; --i) data[i] = 0;       len = 0;       while (x) {         data[++len] = x % base;         x /= base;       }       return *this;     }     bignum(long long x) {       memset(data, 0, sizeof(data));       len = 0;       (*this) = x;     }     bignum operator*(const bignum &b) {       int i, j;       bignum tmp;       for (i = 1; i <= len; ++i)         if (data[i] != 0)           for (j = 1; j <= b.len; ++j)             if (b.data[j] != 0) {               tmp.data[i + j - 1] += data[i] * b.data[j];               tmp.data[i + j] += tmp.data[i + j - 1] / base;               tmp.data[i + j - 1] %= base;             }       tmp.len = len + b.len - 1;       while (tmp.data[tmp.len + 1]) tmp.len++;       return tmp;     }     bignum operator*(long long x) {       int i;       bignum tmp;       for (i = 1; i <= len; ++i) tmp[i] = data[i] * x;       tmp.len = len;       for (i = 1; i <= len; ++i) {         tmp[i + 1] += tmp[i] / base, tmp[i] %= base;         if (tmp[i + 1] && i + 1 > tmp.len) tmp.len++;       }       return tmp;     }     bignum operator/(long long x) {       int i;       bignum tmp;       long long y = 0;       for (i = len; i >= 1; --i) {         y = y * base + data[i];         tmp[i] = y / x;         y %= x;       }       tmp.len = len;       while (tmp[tmp.len] == 0 && tmp.len > 1) tmp.len--;       return tmp;     }     bignum operator/(const bignum &b) {       if (b.len <= 1 && b[1] == 0) {         printf( error! 被0除! );         for (;;)           ;       }       int i, l1 = (len - 1) * Blen, l2 = (b.len - 1) * Blen;       long long x = data[len], y = b[b.len];       while (x) x /= 10, l1++;       while (y) y /= 10, l2++;       bignum tmp, chu, B;       chu = *this;       B = b;       for (i = 1; i * Blen <= l1 - l2; ++i) B *= base;       for (i = 1; i <= (l1 - l2) % Blen; ++i) B *= 10;       for (i = l1 - l2; i >= 0; --i) {         x = 0;         while (chu >= B) chu -= B, x++;         tmp[i / Blen + 1] = tmp[i / Blen + 1] * 10 + x;         B /= 10;       }       tmp.len = (l1 - l2) / Blen + 1;       while (tmp.len >= 1 && !tmp[tmp.len]) tmp.len--;       return tmp;     }     bignum operator+(const bignum &b) {       bignum tmp;       int i, l = max(len, b.len);       for (i = 1; i <= l; ++i) tmp[i] = data[i] + b[i];       for (i = 1; i <= l; ++i) tmp[i + 1] += tmp[i] / base, tmp[i] %= base;       tmp.len = l;       if (tmp[tmp.len + 1]) tmp.len++;       return tmp;     }     bignum operator+(long long x) {       bignum tmp;       tmp = *this;       tmp[1] += x;       for (int i = 1; i <= len && tmp[i] >= base; ++i)         tmp[i + 1] += tmp[i] / base, tmp[i] %= base;       while (tmp[tmp.len + 1]) tmp.len++;       return tmp;     }     bignum operator-(const bignum &b) {       int i;       bignum tmp;       for (i = 1; i <= len; ++i) tmp.data[i] = data[i] - b.data[i];       for (i = 1; i <= len; ++i) {         if (tmp[i] < 0) tmp.data[i] += base, tmp.data[i + 1]--;       }       tmp.len = len;       while (tmp[tmp.len] == 0 && tmp.len > 1) tmp.len--;       return tmp;     }     bignum operator-(long long x) {       bignum tmp;       tmp = *this;       tmp[1] -= x;       for (int i = 1; i <= len && tmp[i] < 0; ++i) {         tmp[i + 1] += (tmp[i] + 1) / base - 1;         tmp[i] = (tmp[i] + 1) % base + base - 1;       }       while (!tmp[tmp.len] && tmp.len > 1) tmp.len--;       return tmp;     }     long long operator%(long long x) {       int i;       long long y = 0;       for (i = len; i >= 1; --i) y = (y * base + data[i]) % x;       return y;     }     bignum operator%(const bignum &b) {       if (b.len <= 1 && b[1] == 0) {         printf( error! 被0 mod! );         for (;;)           ;       }       int i, l1 = (len - 1) * Blen, l2 = (b.len - 1) * Blen;       long long x = data[len], y = b[b.len];       while (x) x /= 10, l1++;       while (y) y /= 10, l2++;       bignum chu, B;       chu = *this;       B = b;       for (i = 1; i * Blen <= l1 - l2; ++i) B *= base;       for (i = 1; i <= (l1 - l2) % Blen; ++i) B *= 10;       for (i = l1 - l2; i >= 0; --i) {         while (chu >= B) chu -= B;         B /= 10;       }       return chu;     }     bignum operator+=(const bignum &b) { return *this = (*this + b); }     bignum operator*=(const bignum &b) { return *this = (*this * b); }     bignum operator-=(const bignum &b) { return *this = (*this - b); }     bignum operator/=(const bignum &b) { return *this = (*this / b); }     bignum operator%=(const bignum &b) { return *this = (*this % b); }     bignum operator*=(long long x) { return (*this = (*this * x)); }     bignum operator+=(long long x) { return (*this = (*this + x)); }     bignum operator-=(long long x) { return (*this = (*this - x)); }     bignum operator/=(long long x) { return (*this = (*this / x)); }     void read() {       char c[bignumlen * Blen + 10];       scanf( %s , c + 1);       int l = strlen(c + 1);       (*this).clear();       long long x;       for (int i = 1; i <= (l - 1) / Blen + 1; ++i) {         x = 0;         for (int j = l - Blen * i + 1; j <= l - Blen * i + Blen; ++j)           if (j >= 1) x = x * 10 + c[j] - 48;         data[++len] = x;       }     }     void write() {       printf( %I64d , data[len]);       for (int i = len - 1; i >= 1; --i) printf( %0*I64d , Blen, data[i]);     }   } p, q, pp, qq;   bignum gcd(const bignum &A, const bignum &B) {     bignum a = A, b = B, res = 1;     while (!(a[1] & 1) && !(b[1] & 1)) a /= 2, b /= 2, res *= 2;     for (;;) {       if (a.len == 1 && a[1] == 0) return b * res;       if (b.len == 1 && b[1] == 0) return a * res;       while (!(a[1] & 1)) a /= 2;       while (!(b[1] & 1)) b /= 2;       if (a > b)         a -= b;       else         b -= a;     }   }   void YF(bignum &A, bignum &B) {     bignum tmp = gcd(A, B);     A /= tmp;     B /= tmp;   }   int n, i, x, num;   int main() {     scanf( %d , &n);     while (n % 2 == 0) {       n /= 2;       num++;     }     if (n == 1) {       printf( %d/%d n , num, 1);       return 0;     }     p = 0;     q = 1;     pp = 1;     qq = 1;     for (i = n + 1;;) {       if (i > n) {         if (q % (i - n) == 0)           q /= i - n;         else           p *= i - n;         if (qq % (i - n) == 0)           qq /= i - n;         else           pp *= i - n;         if (p % i == 0)           p /= i;         else           q *= i;         if (pp % i == 0)           pp /= i;         else           qq *= i;       } else         p += q;       if (i == 1) break;       if (i % 2 == 0)         i /= 2;       else         i += n;     }     YF(p, q);     p = p * qq;     q = q * (qq - pp);     p += q * num;     bignum tmp = gcd(p, q);     (p / tmp).write();     printf( / );     (q / tmp).write();   }   