foo.cc: In function 'int main()':
foo.cc:5:12: warning: unused variable 'w' [-Wunused-variable]
int n,m,q,w,j,i;
^
foo.cc:7:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d",&n,&m);
~~~~~^~~~~~~~~~~~~~
foo.cc:9:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d",&num[i]);
~~~~~^~~~~~~~~~~~~~
foo.cc:12:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d",&opt[j]);
~~~~~^~~~~~~~~~~~~~
foo.cc:14:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d%d",&l[j],&r[j],&v[j]);
~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
foo.cc:20:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d",&l[j],&r[j]);
~~~~~^~~~~~~~~~~~~~~~~~~~
[Hydro](https://hydro.ac)提供评测服务