foo.cpp: In function 'int main()':
foo.cpp:16:9: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
         if(z!=0)sum+=x;b[sum]=1;
         ^~
foo.cpp:16:24: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
         if(z!=0)sum+=x;b[sum]=1;
                        ^