Compilare: main.cpp: In function 'void cer23(int)': main.cpp:101:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 101 | for(int i=0; i<C1.size(); i++) | ~^~~~~~~~~~ main.cpp:125:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 125 | for(int i=0; i<C1.size(); i++) | ~^~~~~~~~~~ main.cpp:141:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 141 | for(int i=0; i<C1.size(); i++) | ~^~~~~~~~~~ main.cpp:165:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 165 | for(int i=0; i<C1.size(); i++) | ~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:180:18: warning: unused variable 'ok' [-Wunused-variable] 180 | bool ok=0; | ^~ main.cpp:197:18: warning: unused variable 'ok' [-Wunused-variable] 197 | bool ok=0; | ^~