1 #include<stdio.h> 2 #include<math.h> 3 #include<stdlib.h> 4 #include<time.h> 5 int main() 6 { 7 int i,j; 8 freopen("data.in","w",stdout); 9 srand((int)time(0)); 10 for(i=1;i<=100000;i++) 11 { 12 j=((int)(rand()*1000.0))%3; 13 if(j==0) 14 printf("u "); 15 else if(j==1) 16 printf("f "); 17 else printf("d "); 18 } 19 return 0; 20 }