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View Compilation Error

0_0_39880944_8198.cpp: In function 'int main()':
0_0_39880944_8198.cpp:11:23: error: 'num' was not declared in this scope; did you mean 'sum'?
   11 |             se.insert(num);
      |                       ^~~
      |                       sum
0_0_39880944_8198.cpp:19:6: error: 'else' without a previous 'if'
   19 |     }else{
      |      ^~~~
0_0_39880944_8198.cpp: At global scope:
0_0_39880944_8198.cpp:24:9: error: expected unqualified-id before 'return'
   24 |         return 0;
      |         ^~~~~~
0_0_39880944_8198.cpp:25:1: error: expected declaration before '}' token
   25 | }
      | ^


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