View Compilation Error

0_0_39415867_11716.cpp:4:1: error: expected ',' or ';' before 'map'
    4 | map<int, int> a;
      | ^~~
0_0_39415867_11716.cpp: In function 'int main()':
0_0_39415867_11716.cpp:8:9: error: 'a' was not declared in this scope
    8 |         a[1e9] = 1;
      |         ^