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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. #define int              long long int
  4. #define double           long double
  5. #define print(a)         for(auto x : a) cout << x << " "; cout << endl
  6.  
  7.  
  8. const int M = 1000000007;
  9. const int N = 3e5+9;
  10. const int INF = 2e9+1;
  11. const int LINF = 2000000000000000001;
  12.  
  13. inline int power(int a, int b, int mod=M) {
  14.     int x = 1;
  15.     a %= mod;
  16.     while (b) {
  17.         if (b & 1) x = (x * a) % mod; 
  18.         a = (a * a) % mod;
  19.         b >>= 1;
  20.     }
  21.     return x;
  22. }
  23.  
  24.  
  25. //_ ***************************** START Below *******************************
  26.  
  27.  
  28.  
  29.  
  30. string a;
  31.  
  32. void consistency(int n){
  33.  
  34.     int i = 1;
  35.     while(i<n && a[i] >= a[i-1]) i++;
  36.     if(i==n){
  37.         cout << "NO" << endl;
  38.         return;
  39.     }
  40.  
  41.     cout << "YES" << endl;
  42.  
  43.     //* a-z -> index 
  44. 	vector<int> mp(26, -1);
  45. 	for(int i=0; i<n; i++){
  46. 		int k = a[i]-'a';
  47. 		mp[k] = i;
  48.  
  49. 		for(int j=k+1; j<26; j++){
  50. 			if(mp[j] != -1 ){
  51. 				cout << mp[j]+1 << " " << i+1 << endl;
  52. 				return;
  53. 			}
  54. 		}
  55. 	}
  56.  
  57. }
  58.  
  59.  
  60.  
  61.  
  62.  
  63.  
  64.  
  65.  
  66. void solve() {
  67.  
  68.     int n;
  69.     cin>> n;
  70.  
  71.     cin >> a;
  72.     consistency(n);
  73.  
  74.  
  75. }
  76.  
  77.  
  78.  
  79.  
  80.  
  81. int32_t main() {
  82.     ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  83.  
  84.     int t = 1;
  85.     // cin >> t;
  86.     while (t--) {
  87.         solve();
  88.     }
  89.  
  90.     return 0;
  91. }
Success #stdin #stdout 0s 5328KB
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7
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stdout
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YES
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https://ideone.com/YJgBlA
language:
C++14 (gcc 8.3)
created:
5 hours ago
visibility:
public

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