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  1. process.stdin.resume();
  2. process.stdin.setEncoding('utf8');
  3.  
  4. function countNumber(num) {
  5.   let count = 0;
  6.   while (num > 0) {
  7.     const digit = num % 10;
  8.     // if (digit === 6) {
  9.     if (digit === 3 || digit === 6|| digit === 9) {
  10.       count++;
  11.     }
  12.     num = Math.floor(num / 10);
  13.   }
  14.   return count;
  15. }
  16.  
  17.  
  18. function countInRange(first, last){
  19.     let count = 0;
  20.     for(let i = first; i< last; i++){
  21.         count+=countNumber(i)
  22.     }
  23.     return count
  24. }
  25.  
  26. var remainder = ''
  27. process.stdin.on('data', function (chunk) {
  28. 	const input = chunk.toString().split(' ')
  29. 	const maxNumber = input[1].length
  30. 	const minNumber = input[0].length
  31. 	console.log(maxNumber, minNumber)
  32. 	let result = 0
  33. 	if(maxNumber-minNumber > 1){
  34. 		for(let i=minNumber+1; i<=maxNumber-1;i++){
  35. 			console.log("i = ",i, Math.pow(10,i-1))
  36. 			result = (Math.pow(10,i-1) + 9*(i-1)*Math.pow(10,i-2))*3
  37.  
  38. 		console.log("count after for 1", result)
  39. 		}
  40. 		console.log("count after for", result)
  41. 	result+=countInRange(Number(input[0]), Math.pow(10,minNumber+1))
  42. 		console.log("count after min", result)
  43. 	result+=countInRange(Math.pow(10,maxNumber-1),Number(input[1]), )
  44. 		console.log("count after max", result)
  45. 	}else{
  46. 		result = countInRange(Number(input[0]), Number(input[1]))
  47. 	}
  48. 	// console.log(count)
  49. 	// console.log(input[0], input[1])
  50. 	// const result = countInRange(Number(input[0]), Number(input[1]))
  51. 	console.log(`result`, result)
  52. });
Success #stdin #stdout 0.1s 36284KB
comments (?)
stdin
copy 
1 10000
stdout
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5 1
i =  2 10
count after for 1 57
i =  3 100
count after for 1 840
i =  4 1000
count after for 1 11100
count after for 11100
count after min 11160
count after max 11160
result 11160
https://ideone.com/4XfzSW
language:
Node.js (node 11.12.0)
created:
14 days ago
visibility:
public

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