func_code_string: #include <bits/stdc++.h>   using namespace std;   long long c;   vector<int> a;   int N;   long long C[65][65];   long long nCk(long long n, long long k) {     if (k > n) return 0;     return C[n][k];   }   long long f(int index, int onesNeeded, int tight) {     if (index == N) {       if (onesNeeded == 0)         return 1;       else         return 0;     }     if (a[index] == 0) {       return f(index + 1, onesNeeded, tight);     } else {       long long ans = nCk(N - index - 1, onesNeeded);       if (onesNeeded >= 1) ans += f(index + 1, onesNeeded - 1, tight);       return ans;     }   }   int brute(int n) {     int ans = 0;     for (int i = 1; i <= n; i++) {       int t = i, cnt = 0;       while (t) {         if (t % 2 == 1) cnt++;         t /= 2;       }       if (cnt == 5) ans++;     }     return ans;   }   int main() {     for (int i = 0; i <= 60; i++) C[i][0] = 1, C[i][i] = 1;     for (int n = 1; n <= 60; n++) {       for (int r = 1; r <= n; r++) {         C[n][r] = C[n - 1][r] + C[n - 1][r - 1];       }     }     long long n, t;     cin >> n >> t;     n++;     int ok = 0;     if ((t & (t - 1)) == 0) ok = 1;     while (t) {       t /= 2;       c++;     };     if (!ok) {       cout << 0 << endl;       return 0;     }     while (n) {       a.push_back(n % 2);       n /= 2;     }     reverse(a.begin(), a.end());     N = a.size();     long long ans1 = f(0, c, 1);     if (c == 1) ans1--;     cout << ans1 << endl;     return 0;   }   