Compilare: main.cpp: In function 'int main()': main.cpp:53:11: warning: suggest explicit braces to avoid ambiguous 'else' [-Wdangling-else] 53 | if(v[i].size()%2) | ^ main.cpp:72:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, bool> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 72 | for(int i=1;i<sol.size();i++) | ~^~~~~~~~~~~ main.cpp:78:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, bool> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 78 | for(int i=0;i<sol.size();i++) | ~^~~~~~~~~~~