View Compilation Error

0_0_39584253_13392.cpp: In function 'bool check(int)':
0_0_39584253_13392.cpp:52:16: error: 'sun' was not declared in this scope; did you mean 'sum'?
   52 |             if(sun[j] - u < x)  break;
      |                ^~~
      |                sum
0_0_39584253_13392.cpp: In function 'void solve()':
0_0_39584253_13392.cpp:75:17: error: 'l' was not declared in this scope
   75 |         else    l += a[i];
      |                 ^