UVA Problem#11636

Question:
http://uva.onlinejudge.org/external/116/11636.html 

Solution: 
int main(){ 
...
..... 
scanf("%d", &n); 
if(n<0) break; 
if(n>1){
j = 0; 
line = 1; 
for(j=1; ; j++){
line *= 2; 
if(line >= n) break; 
}
  ....
....}