View Compilation Error

0_0_34806032_19463.cpp: In function 'int main()':
0_0_34806032_19463.cpp:7:23: error: expected ')' before '!' token
 while (scanf("%d", &n)!-1) {
                       ^
0_0_34806032_19463.cpp:7:26: error: expected ';' before ')' token
 while (scanf("%d", &n)!-1) {
                          ^