foo.cc: In function 'int main()':
foo.cc:25:7: warning: unused variable 'x' [-Wunused-variable]
   25 |   int x,y,h; scanf("%d%d%d",&a[i].x,&a[i].y,&a[i].v);
      |       ^
foo.cc:25:9: warning: unused variable 'y' [-Wunused-variable]
   25 |   int x,y,h; scanf("%d%d%d",&a[i].x,&a[i].y,&a[i].v);
      |         ^
foo.cc:25:11: warning: unused variable 'h' [-Wunused-variable]
   25 |   int x,y,h; scanf("%d%d%d",&a[i].x,&a[i].y,&a[i].v);
      |           ^
foo.cc:22:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   22 |  scanf("%d",&n);
      |  ~~~~~^~~~~~~~~
foo.cc:25:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   25 |   int x,y,h; scanf("%d%d%d",&a[i].x,&a[i].y,&a[i].v);
      |              ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Found 10 testcases.
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