Compilare: main.cpp: In function 'int main()': main.cpp:51:4: warning: this 'if' clause does not guard... [-Wmisleading-indentation] if ( (i & (1 << (j-1))) ) ^~ main.cpp:53:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if' bool ok = true; ^~~~ main.cpp:54:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int j = 0; j < v.size() ; ++j) ~~^~~~~~~~~~ main.cpp:55:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int w = j + 1; w < v.size(); ++w) ~~^~~~~~~~~~