Compilare: main.cpp: In function 'int sortCompare(std::string, std::string)': main.cpp:18:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 18 | for(int i = 0; i < a.length(); i ++){ | ~~^~~~~~~~~~~~ main.cpp: In function 'void printString(int)': main.cpp:29:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 29 | for(int i = 0; i < s[id].length(); i ++) | ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'void printStringDebug(int)': main.cpp:34:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 34 | for(int i = 0; i < s[id].length(); i ++) | ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:75:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 75 | while(k < s[j].length() && l < s[i].length()){ | ~~^~~~~~~~~~~~~~~ main.cpp:75:38: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 75 | while(k < s[j].length() && l < s[i].length()){ | ~~^~~~~~~~~~~~~~~ main.cpp:81:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 81 | if(l == s[i].length()) | ~~^~~~~~~~~~~~~~~~ main.cpp:40:23: warning: unused variable 'x' [-Wunused-variable] 40 | int n, t, i, j, nr, x, k, l; | ^