Accepted
foo.cc: In function 'int main()': foo.cc:40:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ~~~~~^~~~~~~~~~~~~~~~ foo.cc:43:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &u, &v); ~~~~~^~~~~~~~~~~~~~~~
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