Compilare: user.cpp: In function ‘int main()’: user.cpp:85:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( j = 0 ; j < grp[i].size() - 1 ; j++ ) ^ user.cpp:87:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( k = j + 1 ; k < grp[i].size() ; k++ ) ^ user.cpp:107:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( j = 0 ; j < grp[i].size() ; j++ ) ^ user.cpp:113:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( k = 0 ; k < atng[el].size() ; k++ ) ^ user.cpp:117:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( l = 0 ; l < atng[red].size() ; l++ ) ^ user.cpp:154:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ( grp[i].size()> ma ) ^ user.cpp:159:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if ( grp[i].size() == ma ) ^