Compilare: main.cpp: In function 'int main()': main.cpp:71:13: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(int y=0; y<c; ++y) ^~~ main.cpp:73:3: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' ans=ans*(mex.query()+1)%MOD; ^~~ main.cpp: In member function 'int Mex::query()': main.cpp:36:5: warning: control reaches end of non-void function [-Wreturn-type] } ^