Compilare: main.cpp: In function 'int main()': main.cpp:69:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<pct>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 69 | for(int j=0; j<sol.size(); j++) | ~^~~~~~~~~~~ main.cpp:72:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<pct>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 72 | if (urm>=sol.size()) | ~~~^~~~~~~~~~~~