View Compilation Error

0_0_39493142_20142.cpp: In function 'void sol()':
0_0_39493142_20142.cpp:9:5: error: expected ',' or ';' before 'for'
    9 |     for(int i=1,x;i<=n;i++){
      |     ^~~
0_0_39493142_20142.cpp:9:19: error: 'i' was not declared in this scope
    9 |     for(int i=1,x;i<=n;i++){
      |                   ^