Compilare: main.cpp: In member function 'bool Matcher::pairup(int)': main.cpp:74:32: warning: suggest parentheses around assignment used as truth value [-Wparentheses] 74 | return r[l[u] = v] = u; main.cpp:76:32: warning: suggest parentheses around assignment used as truth value [-Wparentheses] 76 | return r[l[u] = v] = u; main.cpp: In constructor 'Matcher::Matcher(int, int)': main.cpp:68:21: warning: 'Matcher::r' will be initialized after [-Wreorder] 68 | vector <int> l, r; | ^ main.cpp:67:27: warning: 'std::vector<std::vector<int>, std::allocator<std::vector<int> > > Matcher::gg' [-Wreorder] 67 | vector <vector <int>> gg; | ^~ main.cpp:80:5: warning: when initialized here [-Wreorder] 80 | Matcher(int _n, int _m) : n(_n), m(_m), l(_n + 1, 0), r(_m + 1, 0), gg(_n + 1, vector <int>(0)), up(max(_n, _m) + 1) {} | ^~~~~~~ main.cpp: In function 'int main()': main.cpp:155:11: warning: suggest explicit braces to avoid ambiguous 'else' [-Wdangling-else] 155 | if(res[i] == -inf) | ^