View Compilation Error

0_0_34771584_30723.cpp: In function 'int main()':
0_0_34771584_30723.cpp:112:5: error: expected initializer before 'while'
     while(~scanf("%d",&n))
     ^
0_0_34771584_30723.cpp:143:13: error: expected '}' at end of input
     return 0;
             ^