foo.cc: In function 'int main()':
foo.cc:9:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    9 |     scanf("%d%d%d",&n,&m,&K);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~
foo.cc:11:38: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   11 |         for(int i=1,x;i<=n;i++) scanf("%d",&x),s1[i]=s1[i-1]+x;
      |                                 ~~~~~^~~~~~~~~
foo.cc:21:40: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   21 |         for(int i=1,x,y;i<=n;i++) scanf("%d%d",&x,&y),s1[i]=s1[i-1]+x,s2[i]=s2[i-1]+y;
      |                                   ~~~~~^~~~~~~~~~~~~~

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