1 #include<stdio.h> 2 #include<math.h> 3 int main() 4 { 5     int n, count = 0; 6     scanf("%d",&n); 7     while(n>1) 8     { 9         if(n % 2 ==1) n = 3*n +1;10         else n/=2;11         count++;12     }13     printf("%d\n",count);14     return 0;15 }

 1 #include<stdio.h> 2 #include<math.h> 3 int main() 4 { 5     int i, j, n, S = 0; 6     scanf("%d",&n); 7     for(i = 1;i<=n;i++) 8     { 9         int factorial = 1;10         for(j = 1;j <=i;j++)11         {12             factorial *= j;13         }14         S +=factorial;15     }16     printf("%d\n",S % 1000000);17     return 0;18 }