func_code_string: #include <bits/stdc++.h>   using namespace std;   template <typename T, typename U>   inline void smin(T &a, U b) {     if (a > b) a = b;   }   template <typename T, typename U>   inline void smax(T &a, U b) {     if (a < b) a = b;   }   int power(int a, int b, int m, int ans = 1) {     for (; b; b >>= 1, a = 1LL * a * a % m)       if (b & 1) ans = 1LL * ans * a % m;     return ans;   }   int a[110];   long long calc(long long first) {     if (first == 0) return 0;     int nn = 0;     while (first) {       a[nn++] = first % 2;       first /= 2;     }     reverse(a, a + nn);     int r = 0, ans = 0;     for (int i = 0; i < nn; i++)       if (!a[i]) r++;     if (r == 1) ans++;     r = 0;     a[nn] = 0;     for (int i = 0; i <= nn; i++)       if (a[i] == 0) {         r = i;         break;       }     ans += r - 1;     for (int i = 1; i < nn - 1; i++) ans += i;     return ans;   }   int main() {     long long first, second;     scanf( %I64d %I64d , &first, &second);     printf( %I64d n , calc(second) - calc(first - 1));   }   