View Compilation Error

0_0_18338777_18551.cpp: In function 'int main()':
0_0_18338777_18551.cpp:21:10: error: expected primary-expression before '%' token
    scanf(%2
          ^
0_0_18338777_18551.cpp:21:11: error: expected '}' at end of input
    scanf(%2
           ^
0_0_18338777_18551.cpp:21:11: error: expected '}' at end of input
0_0_18338777_18551.cpp:21:11: error: expected '}' at end of input