foo.cc: In function 'int main()':
foo.cc:21:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
21 | scanf("%d%d",&n,&m);
| ~~~~~^~~~~~~~~~~~~~
foo.cc:25:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
25 | scanf("%d%d",&a,&b);
| ~~~~~^~~~~~~~~~~~~~
foo.cc:28:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
28 | scanf("%d",&q);
| ~~~~~^~~~~~~~~
foo.cc:30:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
30 | scanf("%d%d",&a,&b);
| ~~~~~^~~~~~~~~~~~~~
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