View Compilation Error

0_0_33541007_20949.cpp: In function 'int main()':
0_0_33541007_20949.cpp:4:3: error: 'ans' was not declared in this scope
   ans[1] = 26, ans[2] = 26 * 26, ans[3] = 26 * 25 * 24 + 26 * 25 + 26 * 25 + 26 * 25 + 26; 
   ^
0_0_33541007_20949.cpp:5:8: error: 'ri' was not declared in this scope
   for (ri tt = read(); tt; --tt) {
        ^
0_0_33541007_20949.cpp:5:24: error: 'tt' was not declared in this scope
   for (ri tt = read(); tt; --tt) {
                        ^
0_0_33541007_20949.cpp:6:18: error: 'read' was not declared in this scope
     int n = read();
                  ^