foo.cc: In function 'int main()':
foo.cc:97:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   97 |  scanf("%lld%lld",&n,&m);
      |  ~~~~~^~~~~~~~~~~~~~~~~~
foo.cc:99:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   99 |   scanf("%lld",&a[i]);
      |   ~~~~~^~~~~~~~~~~~~~
foo.cc:103:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  103 |   scanf("%lld%lld",&op,&x);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~
foo.cc:105:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  105 |    scanf("%lld",&y);
      |    ~~~~~^~~~~~~~~~~
foo.cc:110:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  110 |    scanf("%lld",&y);
      |    ~~~~~^~~~~~~~~~~
foo.cc:113:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  113 |    scanf("%lld",&y);
      |    ~~~~~^~~~~~~~~~~
foo.cc:117:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  117 |    scanf("%lld",&y);
      |    ~~~~~^~~~~~~~~~~
foo.cc:121:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  121 |    scanf("%lld",&y);
      |    ~~~~~^~~~~~~~~~~
foo.cc:124:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  124 |    scanf("%lld",&y);
      |    ~~~~~^~~~~~~~~~~
foo.cc:127:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  127 |    scanf("%lld",&y);
      |    ~~~~~^~~~~~~~~~~

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