Compilare: main.cpp: In function 'int sortCompare(Sir, Sir)': main.cpp:23:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 23 | for(int i = 0; i < a.s.length(); i ++){ | ~~^~~~~~~~~~~~~~ main.cpp: In function 'void printString(int)': main.cpp:38:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 38 | for(int i = 0; i < s[id].s.length(); i ++) | ~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'void printStringDebug(int)': main.cpp:43:20: 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 = 0; i < s[id].s.length(); i ++) | ~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:89:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 89 | while(k < s[j].s.length() && l < s[i].s.length()){ | ~~^~~~~~~~~~~~~~~~~ main.cpp:89:40: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 89 | while(k < s[j].s.length() && l < s[i].s.length()){ | ~~^~~~~~~~~~~~~~~~~ main.cpp:95:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 95 | if(l == s[i].s.length()) | ~~^~~~~~~~~~~~~~~~~~ main.cpp:49:23: warning: unused variable 'x' [-Wunused-variable] 49 | int n, t, i, j, nr, x, k, l; | ^