View Compilation Error

0_0_37286497_20795.cpp: In function 'int main()':
0_0_37286497_20795.cpp:8:3: error: expected ';' before 'while'
   while(n--){
   ^
0_0_37286497_20795.cpp:20:1: error: expected '}' at end of input
 } 
 ^
0_0_37286497_20795.cpp:20:1: error: expected '}' at end of input