Mã chấm: 271503

Main.cc: In function ‘int main()’:
Main.cc:13:5: error: expected ‘;’ before ‘return’
     return 0;
     ^~~~~~
Main.cc:9:10: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d%d%d",&N,&X,&Y,&Z);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~