foo.cc: In function 'int main()':
foo.cc:12:21: warning: 'sum' is used uninitialized [-Wuninitialized]
   12 |                 sum *= 10;
      |                 ~~~~^~~~~
foo.cc:7:13: note: 'sum' was declared here
    7 |     int n,t,sum,i;
      |             ^~~

[Hydro](https://hydro.ac)提供评测服务