Compilare: main.cpp: In function 'void solve()': main.cpp:37:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 37 | for (int i=1;i<=b.size();i++)puteri[i]=(puteri[i-1]*val)%mod; | ~^~~~~~~~~~ main.cpp:40:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 40 | for (int i=1;i<a.size();i++) { | ~^~~~~~~~~ main.cpp:43:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 43 | for (int i=1;i<b.size();i++) { | ~^~~~~~~~~ main.cpp:48:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 48 | for (int i = 1; i <= b.size(); i++) { | ~~^~~~~~~~~~~ main.cpp:52:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 52 | for (int i=1;i<=b.size()-a.size();i++) { | ~^~~~~~~~~~~~~~~~~~~ main.cpp:62:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 62 | for (int i=1;i<=b.size()-a.size();i++) { | ~^~~~~~~~~~~~~~~~~~~