Compilare: user.cpp: In function ‘int main()’: user.cpp:36:17: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation] if( *it2 == x ) v[y].ant.erase(it2);break;} ^~ user.cpp:36:53: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘if’ if( *it2 == x ) v[y].ant.erase(it2);break;} ^~~~~ user.cpp:19:13: warning: unused variable ‘j’ [-Wunused-variable] int i, j, M, N, x, y; ^