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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. int compare(string a, string b){
  4.    while(a.size()<b.size()) a='0'+a;
  5.    while(b.size()<a.size()) b='0'+b;
  6.    if(a<b) return 1;
  7.    else if(a==b) return 0;
  8.    else return -1;
  9. }
  10. string sum(string a, string b){
  11.     int x,y,tong,nho=0;
  12.     string c="";
  13.     while(a.size()<b.size()) a='0'+a;
  14.     while(b.size()<a.size()) b='0'+b;
  15.     for(int i=a.size()-1;i>=0;i--){
  16.         x=a[i]-48;
  17.         y=b[i]-48;
  18.         tong=x+y+nho;
  19.         nho=tong/10;
  20.         c=char(tong%10+48)+c;
  21.     }
  22.     if(nho>0) c='1'+c;
  23.     return c;
  24. }
  25. string chia(string a, int k){
  26.    string t="";
  27.    int du=0;
  28.    int thuong;
  29.    for(int i=0;i<a.size();i++){
  30.       du=du*10+(a[i]-48);
  31.       thuong=du/k;
  32.       du=du%k;
  33.       t=t+char(thuong + 48);
  34.    }
  35.    while(t[0]=='0'&&t.size()>1) t.erase(0,1);
  36.    return t;
  37. }
  38. int mod(string a, int k){
  39.    int du=0;
  40.    for(int i=0;i<a.size();i++){
  41.       du=du*10+(a[i]-48);
  42.       du=du%k;
  43.    }
  44.    return du;
  45. }
  46.  
  47.  
  48. int main(){
  49.  
  50. 	string a;
  51. 	int k;
  52. 	cin >> a;
  53.     int d = 0;
  54.     for(string i = "1"; (compare(i,a)==1||compare(i,a)==0);i = sum(i, "1")){
  55.  
  56.         while(mod(i,5)==0){
  57.             i=chia(i,5);
  58.         	d++;
  59.         }
  60.     }
  61.     cout<<chia(a,5);
  62. }
  63.  
  64.  
Time limit exceeded #stdin #stdout 5s 4256KB
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Standard output is empty
https://ideone.com/rHCd21
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
public

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