Compilare: user.cpp: In function ‘int main()’: user.cpp:47:10: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation] if (viz[c]) ^~ user.cpp:49:7: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘if’ viz[c] = 1; ^~~ user.cpp:45:14: warning: unused variable ‘d’ [-Wunused-variable] int d = q.top().first; ^