foo.cc: In function 'int main()':
foo.cc:20:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
20 | scanf ("%d%d", &n, &m);
| ~~~~~~^~~~~~~~~~~~~~~~
foo.cc:23:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
23 | scanf ("%d", &a[++ k].h);
| ~~~~~~^~~~~~~~~~~~~~~~~~
foo.cc:27:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
27 | scanf ("%d", &t);
| ~~~~~~^~~~~~~~~~
foo.cc:30:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
30 | scanf ("%d", &y[i]);
| ~~~~~~^~~~~~~~~~~~~
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