Compilare: main.cpp: In member function 'int Flow::dfs(int, int)': main.cpp:61:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 61 | for(int i = left[node]; i < g[node].size(); i++) { | ~~^~~~~~~~~~~~~~~~ main.cpp: In member function 'int Flow::mkflow()': main.cpp:85:9: warning: unused variable 'cnt' [-Wunused-variable] 85 | int cnt = 0; | ^~~ main.cpp: In function 'int main()': main.cpp:104:13: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' 104 | for(auto &[a, b, c, d] : nodes) | ^ main.cpp:119:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' 119 | for(auto [x2, y2, z2, t2] : nodes) { | ^