foo.c:1:25: warning: extra tokens at end of #include directive
    1 | #include<bits/stdc++.h> using namespace std;int main(){int a,b;cin>>a>>b;a += b;cout<<a<<endl;return 0;}
      |                         ^~~~~
foo.c:1:9: fatal error: bits/stdc++.h: No such file or directory
    1 | #include<bits/stdc++.h> using namespace std;int main(){int a,b;cin>>a>>b;a += b;cout<<a<<endl;return 0;}
      |         ^~~~~~~~~~~~~~~
compilation terminated.

[Hydro](https://hydro.ac)提供评测服务