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  1. #include <bits/stdc++.h>
  2. #ifndef ONLINE_JUDGE
  3. #include "debug.h"
  4. #else
  5. #define debug(...)
  6. #endif
  7. #define int long long
  8. #define oo LLONG_MAX >> 2
  9. #define all(x) x.begin(), x.end()
  10. #define allr(x) x.rbegin(), x.rend()
  11. #define pep_Guardiola      \
  12.   ios::sync_with_stdio(0); \
  13.   cin.tie(0);              \
  14.   cout.tie(0);
  15. using namespace std;
  16.  
  17. void io()
  18. {
  19. #ifndef ONLINE_JUDGE
  20.   freopen("input.txt", "r", stdin);
  21.   // freopen("output.txt", "w", stdout);
  22. #endif
  23. }
  24.  
  25. int skip(int m, int st, const vector<int>&moves){
  26.   int pos = st, skips = 0;
  27.   for(auto x : moves){
  28.     if(pos+m > m || pos+m < 1) skips++;
  29.     else pos=pos+m;
  30.   }
  31.   return skips;
  32. }
  33.  
  34. int ternary(int m, const vector<int>&moves){
  35.   if(moves.empty()) return 0;
  36.   int l = 1, r = m;
  37.   while(r-l > 2){
  38.     int mid1 = l + (r-l)/3;
  39.     int mid2 = r - (r-l)/3;
  40.     int f1 = skip(m, mid1, moves);
  41.     int f2 = skip(m, mid2, moves);
  42.     if(f1 < f2) r = mid2;
  43.     else if(f1 > f2) l = mid1;
  44.     else l = mid1, r = mid2;
  45.   }
  46.   int mn = skip(m, l, moves);
  47.   for(int i = l+1; i <= r; i++){
  48.     mn = min(mn, skip(mn, i, moves));
  49.   }
  50.   return mn;
  51. }
  52.  
  53. void Guardiola()
  54. {
  55.   int r, c; string s;
  56.   cin >> r >> c >> s;
  57.   vector<int> v, h;
  58.   for(int i = 0; i < s.length(); i++){
  59.     if(s[i] == '>') v.push_back(1);
  60.     if (s[i] == '<') v.push_back(-1);
  61.     if(s[i] == 'v') v.push_back(1);
  62.     if(s[i] == '^') h.push_back(-1);
  63.   }
  64.   int mn1 = ternary(r, v);
  65.   int mn2 = ternary(c, h);
  66.   cout << mn1+ mn2 << endl;
  67. }
  68.  
  69. signed main()
  70. {
  71.   pep_Guardiola;
  72.   io();
  73.   int t = 1;
  74.   cin >> t;
  75.   while (t--)
  76.     Guardiola();
  77.   return 0;
  78. }
Success #stdin #stdout 0s 5320KB
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https://ideone.com/UXmWnk
language:
C++ (gcc 8.3)
created:
17 hours ago
visibility:
public

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