View Compilation Error

0_0_21712777_32586.cpp: In function 'int main()':
0_0_21712777_32586.cpp:76:9: error: incompatible types in assignment of 'int' to 'int [100010]'
    root += 10;
         ^
0_0_21712777_32586.cpp:77:8: error: lvalue required as decrement operand
    root--;
        ^