Compilare: main.cpp: In function 'void solve_testcase()': main.cpp:253:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 253 | for(int i = 1; i < s.size(); ++i) | ~~^~~~~~~~~~ main.cpp:256:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 256 | while(i + z[i] < s.size() && | ~~~~~~~~~^~~~~~~~~~ main.cpp:263:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 263 | for(int i = 1; i < s.size(); ++i) | ~~^~~~~~~~~~ main.cpp:248:23: warning: unused variable 'm' [-Wunused-variable] 248 | int n = s.size(), m = t.size(); | ^