View Compilation Error

0_0_24232154_3450.cpp:10:1: error: expected initializer before 'int'
 int f[S],sum[S];
 ^
0_0_24232154_3450.cpp: In function 'void init()':
0_0_24232154_3450.cpp:13:13: error: 'str' was not declared in this scope
  scanf("%s",str+1);
             ^
0_0_24232154_3450.cpp:15:28: error: 'sum' was not declared in this scope
  for (int i=0;i<1<<20;++i) sum[i]=0;
                            ^
0_0_24232154_3450.cpp:16:2: error: 'sum' was not declared in this scope
  sum[0]=1; 
  ^
0_0_24232154_3450.cpp: In function 'void solve()':
0_0_24232154_3450.cpp:32:15: error: 'str' was not declared in this scope
    scanf("%s",str),
               ^
0_0_24232154_3450.cpp:37:4: error: 'f' was not declared in this scope
    f[x]=sum[x];
    ^
0_0_24232154_3450.cpp:37:9: error: 'sum' was not declared in this scope
    f[x]=sum[x];
         ^