#include <bits/stdc++.h> using namespace std; #define NAME "A" #define ll long long #define fi first #define se second #define pb push_back #define all(x) x.begin(), x.end() #define MASK(x) (1ll << (x)) #define BIT(x, i) (((x) >> (i)) & 1) const int N = 2e5 + 5; const int inf = 1e9; int n, k; string s; deque<int> J, O, I; void input() { cin >> n >> k >> s; s = " " + s; } void solve() { int ans = inf; for (int i = 1; i <= n; i++) { if (s[i] == 'J') J.pb(i); else if (s[i] == 'O') O.pb(i); else I.pb(i); } while ((int)J.size() >= k) { while (O.size() && O.front() <= J[k - 1]) { O.pop_front(); } if ((int)O.size() < k) break; while (I.size() && I.front() <= O[k - 1]) { I.pop_front(); } if ((int)I.size() < k) break; ans = min(ans, I[k - 1] - J[0] - 3 * k + 1); J.pop_front(); } if (ans == inf) { ans = -1; } cout << ans; } signed main() { if (fopen(NAME".INP", "r")) { freopen(NAME".INP", "r", stdin); freopen(NAME".OUT", "w", stdout); } cin.tie(0)->sync_with_stdio(0); input(); solve(); return 0; }

ho_t2.cpp: In function 'int main()':
ho_t2.cpp:52:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   52 |         freopen(NAME".INP", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
ho_t2.cpp:53:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   53 |         freopen(NAME".OUT", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~