foo.cc: In function 'int main()':
foo.cc:6:6: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    6 | scanf("%d%d",&n,&Q);
      | ~~~~~^~~~~~~~~~~~~~
foo.cc:7:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    7 | for(int i=1;i<=n;i++){scanf("%d",&a[i]);s[i]=s[i-1]+a[i];}
      |                       ~~~~~^~~~~~~~~~~~
foo.cc:9:6: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    9 | scanf("%d%d",&l,&r);
      | ~~~~~^~~~~~~~~~~~~~

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