View Compilation Error

0_0_14910725_18725.cpp: In function 'int main()':
0_0_14910725_18725.cpp:5:21: error: expected ')' before '!' token
 while(scanf("%d",&n)!-1)
                     ^
0_0_14910725_18725.cpp:5:24: error: expected ';' before ')' token
 while(scanf("%d",&n)!-1)
                        ^
0_0_14910725_18725.cpp:20:1: error: expected '}' at end of input
 }
 ^