Compilare: main.cpp: In function 'bool isok(int)': main.cpp:46:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Child>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 46 | return cid[x] < c[x].size(); | ~~~~~~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:109:32: warning: comparison of integer expressions of different signedness: 'std::vector<Child>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 109 | while(k2 >= 0 && c[1].size() > k1 && isok(3) && notzero(4) && get(3) < getl(4)){ | ~~~~~~~~~~~~^~~~ main.cpp:54:13: warning: unused variable 'j' [-Wunused-variable] 54 | int n, i, j, k1, k2, k, nr; | ^ main.cpp:54:27: warning: unused variable 'nr' [-Wunused-variable] 54 | int n, i, j, k1, k2, k, nr; | ^~