func_code_string: #include <bits/stdc++.h>   std::mt19937 rng(       (int)std::chrono::steady_clock::now().time_since_epoch().count());   int main() {     std::ios_base::sync_with_stdio(false);     std::cin.tie(NULL);     int n, w, m;     std::cin >> n >> w >> m;     std::cout << std::setprecision(10) << std::fixed;     std::vector<std::vector<std::pair<int, int>>> ans(m);     w *= m;     int cup = n * w / m;     int rest = w;     for (int i = 0, j = 0; i < m; i++) {       if (rest > 0 && rest != w && rest > cup) {         std::cout <<  NO n ;         return 0;       }       int want = cup;       while (want > 0) {         int use = std::min(rest, want);         assert(use != 0);         ans[i].emplace_back(use, j + 1);         want -= use;         rest -= use;         if (rest == 0) {           j++;           rest = w;         }       }     }     std::cout <<  YES n ;     for (auto vec : ans) {       for (int i = 0; i < (int)vec.size(); i++) {         std::cout << vec[i].second <<     << (double)vec[i].first / m                   << (i + 1 == (int)vec.size() ?   n  :    );       }     }   }   