View Compilation Error

0_0_32791757_10950.cpp:12:1: error: expected ',' or ';' before 'int'
 int data[maxn];
 ^
0_0_32791757_10950.cpp:13:12: error: array bound is not an integer constant before ']' token
 int fi[maxn];
            ^
0_0_32791757_10950.cpp: In function 'void addv(int, int)':
0_0_32791757_10950.cpp:21:9: error: 'data' was not declared in this scope
         data[x]+=value;
         ^
0_0_32791757_10950.cpp: In function 'int sum(int)':
0_0_32791757_10950.cpp:29:14: error: 'data' was not declared in this scope
         ans+=data[x];
              ^
0_0_32791757_10950.cpp: In function 'int main()':
0_0_32791757_10950.cpp:39:16: error: 'fi' was not declared in this scope
         memset(fi,0,sizeof(fi));
                ^
0_0_32791757_10950.cpp:40:16: error: 'data' was not declared in this scope
         memset(data,0,sizeof(data));
                ^