Compilare: main.cpp: In function 'int overlap(int)': main.cpp:14:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 14 | while(j < s[i].length() && j < s[i-1].length() && s[i][j] == s[i-1][j]) { | ~~^~~~~~~~~~~~~~~ main.cpp:14:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 14 | while(j < s[i].length() && j < s[i-1].length() && s[i][j] == s[i-1][j]) { | ~~^~~~~~~~~~~~~~~~~