Compilare: main.cpp: In function 'll getval(ll, std::vector<long long int>)': main.cpp:95:26: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 95 | for(int i=0;i<r.size();i++) | ~^~~~~~~~~ main.cpp:102:26: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 102 | for(int i=0;i<r.size();i++) | ~^~~~~~~~~ main.cpp:109:40: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 109 | for(int i=0,l=lg/2+1,c=lg/2+1;i<r.size();i++,l--) | ~^~~~~~~~~ main.cpp:118:40: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 118 | for(int i=1,l=lg/2+2,c=lg/2+1;i<r.size();i++,l++) | ~^~~~~~~~~ main.cpp:127:38: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 127 | for(int i=1,l=lg/2+1,c=lg/2;i<r.size();i++,c--) | ~^~~~~~~~~ main.cpp:136:40: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 136 | for(int i=1,l=lg/2+1,c=lg/2+2;i<r.size();i++,c++) | ~^~~~~~~~~ main.cpp: In function 'int main()': main.cpp:155:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 155 | for(int i=0;i<s.size();i++) | ~^~~~~~~~~ main.cpp: In function 'll getval(ll, std::vector<long long int>)': main.cpp:147:1: warning: control reaches end of non-void function [-Wreturn-type] 147 | } | ^