Compilare: main.cpp: In function 'int main()': main.cpp:72:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 72 | for(int i=1;i<ciclu.size();i++) | ~^~~~~~~~~~~~~ main.cpp:92:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 92 | for(int i=0;i<sol.size();i++) | ~^~~~~~~~~~~ main.cpp:96:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 96 | for(int j=i+1;j<sol.size();j++) fout<<sol[j].first<<' '<<sol[j].second<<'\n'; | ~^~~~~~~~~~~ main.cpp:100:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 100 | for(int i=0;i<sol.size();i++) | ~^~~~~~~~~~~ main.cpp:70:10: warning: unused variable 'ok' [-Wunused-variable] 70 | bool ok=1; | ^~