Compilare: main.cpp: In function 'void solve()': main.cpp:42:22: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 42 | if(cate[2].size()==n) | ~~~~~~~~~~~~~~^~~ main.cpp: In function 'int main()': main.cpp:169:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 169 | for(int i=1;i<pr.size()-1;++i) | ~^~~~~~~~~~~~ main.cpp:177:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 177 | for(int i=1;i<pr.size()-1;++i) | ~^~~~~~~~~~~~ main.cpp:187:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 187 | for(int i=1;i<pr.size()-1;++i) | ~^~~~~~~~~~~~ main.cpp:196:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 196 | for(int i=2;i<pr.size()-2;++i) | ~^~~~~~~~~~~~