View Compilation Error

0_0_30355071_29711.cpp: In function 'void build()':
0_0_30355071_29711.cpp:58:14: error: 'n' was not declared in this scope
     update(1,n,1,1,n,1);
              ^
0_0_30355071_29711.cpp: In function 'int main()':
0_0_30355071_29711.cpp:121:25: error: 'n' was not declared in this scope
     while(scanf("%d%d",&n,&k)!=EOF)
                         ^
0_0_30355071_29711.cpp:121:28: error: 'k' was not declared in this scope
     while(scanf("%d%d",&n,&k)!=EOF)
                            ^
0_0_30355071_29711.cpp:130:29: error: 'ta' was not declared in this scope
                 scanf("%d",&ta);
                             ^
0_0_30355071_29711.cpp:142:29: error: 'ta' was not declared in this scope
                 scanf("%d",&ta);
                             ^
0_0_30355071_29711.cpp:159:29: error: 'ta' was not declared in this scope
                 scanf("%d",&ta);
                             ^