View Compilation Error

0_0_15885651_15521.cpp:17:17: error: missing terminating " character
                 scanf("%d %d %d %2
                 ^
0_0_15885651_15521.cpp: In function 'int main()':
0_0_15885651_15521.cpp:17:22: error: expected primary-expression at end of input
                 scanf("%d %d %d %2
                      ^
0_0_15885651_15521.cpp:17:22: error: expected '}' at end of input
0_0_15885651_15521.cpp:17:22: error: expected '}' at end of input