Compilare: main.cpp: In function 'std::string longestCommonPrefix(std::string*, int)': main.cpp:17:23: warning: comparison of integer expressions of different signedness: 'int' and 'const long unsigned int' [-Wsign-compare] 17 | for (int i = 0; i < min(arr[0].size(),arr[1].size()); i++) { | ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:26:27: warning: comparison of integer expressions of different signedness: 'int' and 'const long unsigned int' [-Wsign-compare] 26 | for (int j = 0; j < min(ret.size(),arr[i].size()); j++) { | ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~