View Compilation Error

0_0_34157597_9428.cpp: In function 'int main()':
0_0_34157597_9428.cpp:3:5: error: 'longlong' was not declared in this scope
     longlong n, max;
     ^
0_0_34157597_9428.cpp:4:16: error: 'n' was not declared in this scope
  scanf("ll%d",&n);
                ^
0_0_34157597_9428.cpp:5:11: error: expected ';' before 'sum'
  longlong sum;
           ^
0_0_34157597_9428.cpp:6:2: error: 'sum' was not declared in this scope
  sum = (n + 1)*n / 2;
  ^
0_0_34157597_9428.cpp:9:4: error: 'max' was not declared in this scope
    max = sum % i;
    ^
0_0_34157597_9428.cpp:13:17: error: 'max' was not declared in this scope
  printf("ll%d", max);
                 ^