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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. #define fast_io ios::sync_with_stdio(false); cin.tie(NULL)
  5. #define int long long
  6.  
  7. void solve() {
  8.     string s;
  9.     cin >> s;
  10.     int n = s.size();
  11.  
  12.     if (n == 1) {
  13.         cout << 1 << "\n";
  14.         return;
  15.     }
  16.  
  17.     for (int i = 0; i + 1 < n; i++) {
  18.         if (s[i] == '*' && s[i+1] == '*') {
  19.             cout << -1 << "\n";
  20.             return;
  21.         }
  22.     }
  23.  
  24.     bool seenGt = false;
  25.     for (char c : s) {
  26.         if (c == '>') seenGt = true;
  27.         if (c == '<' && seenGt) {
  28.             cout << -1 << "\n";
  29.             return;
  30.         }
  31.     }
  32.  
  33.     for (int i = 0, seen = 0; i < n; i++) {
  34.         if (s[i] == '>') seen = 1;
  35.         if (s[i] == '*' && seen) {
  36.             cout << -1 << "\n";
  37.             return;
  38.         }
  39.     }
  40.  
  41.     for (int i = n-1, seen = 0; i >= 0; i--) {
  42.         if (s[i] == '<') seen = 1;
  43.         if (s[i] == '*' && seen) {
  44.             cout << -1 << "\n";
  45.             return;
  46.         }
  47.     }
  48.  
  49.     int first_gt = -1;
  50.     for (int i = 0; i < n; i++) {
  51.         if (s[i] == '>') {
  52.             first_gt = i;
  53.             break;
  54.         }
  55.     }
  56.  
  57.     int last_lt = -1;
  58.     for (int i = 0; i < n; i++) {
  59.         if (s[i] == '<') last_lt = i;
  60.     }
  61.  
  62.     if (first_gt == -1) {
  63.         cout << n << "\n";
  64.         return;
  65.     }
  66.  
  67.     if (last_lt == -1) {
  68.         cout << n << "\n";
  69.         return;
  70.     }
  71.  
  72.     int L = first_gt;
  73.     int R = n - 1 - last_lt;
  74.  
  75.     cout << max(L, R) << "\n";
  76. }
  77.  
  78. int32_t main() {
  79.     fast_io;
  80.     int t;
  81.     cin >> t;
  82.     while (t--) solve();
  83.     return 0;
  84. }
  85.  
Success #stdin #stdout 0.01s 5324KB
comments (?)
stdin 
4
*****
<<<>
>*<
*
stdout 
-1
3
-1
1
https://ideone.com/DxbxDu
language:
C++ (gcc 8.3)
created:
4 hours ago
visibility:
public

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