foo.cc: In function 'int main()':
foo.cc:98:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   98 |  scanf("%lld%lld",&n,&m);
      |  ~~~~~^~~~~~~~~~~~~~~~~~
foo.cc:100:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  100 |   scanf("%lld",&a[i]);
      |   ~~~~~^~~~~~~~~~~~~~
foo.cc:104:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  104 |   scanf("%lld%lld",&op,&x);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~
foo.cc:107:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  107 |    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:119:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  119 |    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:128:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  128 |    scanf("%lld",&y);
      |    ~~~~~^~~~~~~~~~~
foo.cc:132:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  132 |    scanf("%lld",&y);
      |    ~~~~~^~~~~~~~~~~
foo.cc:136:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  136 |    scanf("%lld",&y);
      |    ~~~~~^~~~~~~~~~~

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