func_code_string: #include <bits/stdc++.h>   using namespace std;   long double a[1001][1001];   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     long long n, t, m, w, b;     cout.precision(12);     cin >> w >> b;     for (int i = 0; i <= w; i++) {       for (int j = 0; j <= b; j++) {         if (!i && !j) continue;         long double x = i * 1.0;         long double y = j * 1.0;         a[i][j] = (x / (x + y));         long double z = (y - 2) / (x + y - 2);         if ((i >= 0) && ((j - 3) >= 0)) {           a[i][j] += (a[i][j - 3] * z * (y / (x + y)) * ((y - 1) / (x + y - 1)));         }         if (((i - 1) >= 0) && ((j - 2) >= 0)) {           a[i][j] += (a[i - 1][j - 2] * (1 - z) * (y / (x + y)) *                       ((y - 1) / (x + y - 1)));         }       }     }     cout << fixed << a[w][b];     return 0;   }   