View Compilation Error

0_0_26741368_26139.cpp:6:1: error: expected initializer before 'long'
 long long a[100100];
 ^
0_0_26741368_26139.cpp: In function 'int main()':
0_0_26741368_26139.cpp:18:18: error: 'a' was not declared in this scope
    scanf("%lld",&a[i]);
                  ^
0_0_26741368_26139.cpp:23:22: error: 'a' was not declared in this scope
    while(q.size() && a[q.top()]>=a[i])
                      ^
0_0_26741368_26139.cpp:34:22: error: 'a' was not declared in this scope
    while(q.size() && a[q.top()]>=a[i])
                      ^
0_0_26741368_26139.cpp:37:5: error: 'r' was not declared in this scope
     r[i]=q.top();
     ^
0_0_26741368_26139.cpp:38:9: error: 'r' was not declared in this scope
    else r[i]=n;
         ^
0_0_26741368_26139.cpp:43:20: error: 'r' was not declared in this scope
    long long much=(r[i]-l[i])*a[i];
                    ^
0_0_26741368_26139.cpp:43:31: error: 'a' was not declared in this scope
    long long much=(r[i]-l[i])*a[i];
                               ^