foo.cc: In function 'int main()':
foo.cc:89:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
89 | scanf("%lld%lld",&n,&q);
| ~~~~~^~~~~~~~~~~~~~~~~~
foo.cc:91:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
91 | scanf("%lld",&x);
| ~~~~~^~~~~~~~~~~
foo.cc:96:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
96 | scanf("%lld%lld",&u,&v);
| ~~~~~^~~~~~~~~~~~~~~~~~
foo.cc:103:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
103 | scanf("%lld%lld",&s,&t);
| ~~~~~^~~~~~~~~~~~~~~~~~
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