View Compilation Error

0_0_16992944_31153.cpp: In function 'int main()':
0_0_16992944_31153.cpp:13:16: error: 'n' was not declared in this scope
   scanf("%d", &n);
                ^
0_0_16992944_31153.cpp:18:17: error: 't' was not declared in this scope
    scanf("%d", &t);
                 ^