foo.cc: In function 'int main()':
foo.cc:6:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
6 | scanf("%d%d", &n, &m);
| ~~~~~^~~~~~~~~~~~~~~~
foo.cc:8:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
8 | scanf("%d", &x);
| ~~~~~^~~~~~~~~~
foo.cc:12:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
12 | scanf("%d", &x);
| ~~~~~^~~~~~~~~~
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