View Compilation Error

0_0_34216490_29480.cpp:51:1: error: 'li' does not name a type
 li res = 0;
 ^
0_0_34216490_29480.cpp: In function 'void Build(long long int)':
0_0_34216490_29480.cpp:86:5: error: 'res' was not declared in this scope
     res += v;
     ^
0_0_34216490_29480.cpp: In function 'int main()':
0_0_34216490_29480.cpp:113:9: error: 'res' was not declared in this scope
         res = 0;
         ^