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  1. #include<stdio.h>
  2. int main(){
  3.         int num=0;
  4.         int count=0;
  5.         int max=0;
  6.         int k;
  7.         int begin,end;
  8.         int result[50][3];
  9.         int round=0;
  10.         int i,j;
  11.         while(scanf("%d %d",&begin,&end)!=EOF){
  12.                 max=0;
  13.                 result[round][0]=begin;
  14.                 result[round][1]=end;
  15.                 for(k=begin;k<=end;k++){
  16.                         count=0;
  17.                         num=k;
  18.                         while(num!=1){
  19.                                 if(num%2==1)
  20.                                         num=3*num+1;
  21.                                 else
  22.                                         num=num/2;
  23.                                 if(num!=1)
  24.                                         count++;
  25.                         }
  26.                         if(count>max){
  27.                                 max=count;
  28.                         }
  29.                 }
  30.                 result[round][2]=max+2;
  31.                 round++;
  32.         }
  33.         for(i=0;i<round;i++){
  34.                 for(j=0;j<3;j++){
  35.                         printf("%d ",result[i][j]);
  36.                 }
  37.                 printf("\n");
  38.         }
  39.         return 0;
  40. }
  41.  
Success #stdin #stdout 0s 1832KB
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https://ideone.com/exvIvB
language:
C (gcc 8.3)
created:
13 years ago
visibility:
public

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