foo.cc: In function 'int main()':
foo.cc:50:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&a[i]);
   ~~~~~^~~~~~~~~~~~
foo.cc:61:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d%d",&q[kq].l,&q[kq].r);
    ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
foo.cc:68:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d%d",&p[kp].pos,&p[kp].to);
    ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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