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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. bool nhuan(int y)
  5. {
  6.     return(y % 4 == 0 && y % 100 != 0) ||(y % 400 == 0);
  7. }
  8.  
  9. int songay(int t, int n)
  10. {
  11.     if(t== 1 || t==3 || t ==5 || t==7 || t==8 || t==10 || t==12)
  12.         return 31;
  13.     if(t==4 || t==6 || t== 9 || t==11) return 30;
  14.     if(nhuan(n)) return 29;
  15.     else return 28;
  16. }
  17.  
  18. string s, no= "KHONG TAO DUOC";
  19.  
  20. int main()
  21. {
  22.     freopen("bai01.inp","r",stdin);
  23.     freopen("bai01.out","w",stdout);
  24.     cin >> s;
  25.     if(s[0]=='0') s.erase(0,1);
  26.     if(s[0]=='0') s.erase(0,1);
  27.     int ng, th, na;
  28.     if(s.length()<4) cout<<no;
  29.     else if(s.length()==4)
  30.     cout<<s[0]<<'/'<<s[1]<<'/'<<s[2]<<s[3];
  31.     else if(s[1]=='1' && s[2] <= '2')
  32.     cout<<s[0]<<'/'<<s[1]<<s[2]<<'/'<<s[3]<<s[4];
  33.     else
  34.     {
  35.         ng =(s[0]-48)*10 + s[1]-48;
  36.             th	= s[2] - 48;
  37.         na	=(s[3]-48)*10 + s[4]-48;
  38.         if	(na==0) na=100;
  39.         if	(ng > songay(th, 2000+na))
  40.             cout << no;
  41.         else
  42.             cout << ng << '/'<<th<<'/' << na;
  43. 	}
  44. 	return 0;
  45. }
  46.  
Success #stdin #stdout 0.01s 5324KB
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https://ideone.com/45MlTh
language:
C++14 (gcc 8.3)
created:
7 days ago
visibility:
public

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