fork download
copy 
  1. #include <bits/stdc++.h>
  2.  
  3. using namespace std;
  4.  
  5. #define ll long long
  6. #define ull unsigned ll
  7. #define ld long double
  8. typedef vector<int> vi;
  9. typedef multiset<int> mi;
  10. typedef multiset<ll> mll;
  11. typedef vector<ll> vll;
  12. typedef vector<bool> vb;
  13. typedef vector<string> vs;
  14. typedef set<ll> sll;
  15. typedef vector<vector<int>> _2vi;
  16. typedef vector<vector<ll>> _2vll;
  17. #define all(v) ((v).begin()), ((v).end())
  18. #define sz(v) ((ll)((v).size()))
  19.  
  20. #define vinp(v, n)                \
  21.     for (ull i = 0; i < (n); i++) \
  22.     cin >> (v)[i]
  23. #define printv(v)      \
  24.     for (auto i : (v)) \
  25.     cout << i << " "
  26. #define fr0(i, n) for (ull(i) = 0; (i) < (n); (i)++)
  27. #define fr1(i, n) for (ull(i) = 1; (i) < (n); (i)++)
  28. #define fr(i, x, n) for (ull(i) = (x); (i) < (n); (i)++)
  29. #define _CRT_SECURE_NO_WARNING
  30. const ll MOD = 1000000007;
  31.  
  32. void Bustany() {
  33.     ios_base::sync_with_stdio(false);
  34.     cin.tie(NULL);
  35.     cout.tie(NULL);
  36. #ifndef ONLINE_JUDGE
  37.     freopen("./in.txt", "r", stdin), freopen("./out.txt", "w", stdout);
  38. #endif
  39. }
  40.  
  41. const ll N = 1e3 + 10;
  42. vector<sll> adj(N);
  43. //_2vll adj(N,vll(N));
  44. vb vis;
  45.  
  46. vector<vector<vll>> pref(N, vector<vll>(N, vll(26, 0)));
  47. ll n, m, k;
  48. pair<ll, ll> ansXY;
  49.  
  50. bool can(ll mid) {
  51.     for (ll i = 1; i <= n - mid + 1; i++) {
  52.         for (ll j = 1; j <= m - mid + 1; j++) {
  53.             ll DistinctChars = 0;
  54.             for (ll o = 0; o < 26; o++) {
  55.                 ll a = i, b = j;
  56.                 ll c = a + mid - 1, d = b + mid - 1;
  57.                 ll freq = pref[c][d][o] - pref[a - 1][d][o] - pref[c][b - 1][o] + pref[a - 1][b - 1][o];
  58.                 if (freq) {
  59.                     DistinctChars++;
  60.                 }
  61.             }
  62.             if (DistinctChars >= k) {
  63.                 ansXY = {i, j};
  64.                 return true;
  65.             }
  66.         }
  67.     }
  68.     return false;
  69. }
  70.  
  71. void solve() {
  72.     cin >> n >> m >> k;
  73.     vector<vector<char>> v(n + 1, vector<char>(m + 1));
  74.     fr1(i, n + 1) {
  75.         fr1(j, m + 1) {
  76.             cin >> v[i][j];
  77.         }
  78.     }
  79.     fr1(i, n + 1) {
  80.         fr1(j, m + 1) {
  81.             pref[i][j][v[i][j] - 'A']++;
  82.         }
  83.     }
  84.     fr1(i, n + 1) {
  85.         fr1(j, m + 1) {
  86.             fr0(o, 26) {
  87.                 pref[i][j][o] += pref[i - 1][j][o] + pref[i][j - 1][o] - pref[i - 1][j - 1][o];
  88.             }
  89.         }
  90.     }
  91.     ll l = 1, r = min(n, m), ans = -1, mid;
  92.     while (l <= r) {
  93.         mid = (l + r) / 2;
  94.         if (!can(mid)) {
  95.             l = mid + 1;
  96.         } else {
  97.             ans = mid;
  98.             r = mid - 1;
  99.         }
  100.     }
  101.     if (ans == -1) {
  102.         cout << ans;
  103.         return;
  104.     }
  105.     cout << ans << endl;
  106.     cout << ansXY.first << " " << ansXY.second;
  107. }
  108.  
  109. int main() {
  110.     Bustany();
  111.     ll t = 1;
  112. //     cin >> t;
  113.     while (t--) {
  114.         solve();
  115.     }
  116. }
Success #stdin #stdout 0.18s 250660KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
-1
https://ideone.com/A03dcs
language:
C++ (gcc 8.3)
created:
9 hours ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!