View Compilation Error

0_0_36714945_20157.cpp:19:1: error: 'll' does not name a type
 ll s, a[maxn];
 ^
0_0_36714945_20157.cpp:21:1: error: 'll' does not name a type
 ll calc(vector<ll> v, int length) {
 ^
0_0_36714945_20157.cpp:43:1: error: 'll' does not name a type
 ll solve() {
 ^
0_0_36714945_20157.cpp: In function 'int main()':
0_0_36714945_20157.cpp:73:7: error: 'read' was not declared in this scope
 read(T);
       ^
0_0_36714945_20157.cpp:75:15: error: 's' was not declared in this scope
 read(n), read(s), read(m), read(k);
               ^
0_0_36714945_20157.cpp:76:5: error: 'i' was not declared in this scope
 rep(i, 0, n - 1)    read(a[i]);
     ^
0_0_36714945_20157.cpp:76:16: error: 'rep' was not declared in this scope
 rep(i, 0, n - 1)    read(a[i]);
                ^
0_0_36714945_20157.cpp:77:53: error: 'solve' was not declared in this scope
 printf("Case #%d: %lld\n", kase, max(0LL, s - solve()));
                                                     ^