View Compilation Error

0_0_39882439_22648.cpp: In function 'void update(int, int, int, int, int)':
0_0_39882439_22648.cpp:43:39: error: expected ';' before '}' token
   43 |      tree[p] = tree[ls(p)]+tree[rs(p)]
      |                                       ^
      |                                       ;
   44 | }
      | ~                                      
0_0_39882439_22648.cpp: In function 'int main()':
0_0_39882439_22648.cpp:58:27: error: 'I' was not declared in this scope
   58 |             scanf("%d", a+I);
      |                           ^