Submission #883334

#TimeUsernameProblemLanguageResultExecution timeMemory
883334marvinthangJJOOII 2 (JOI20_ho_t2)C++17
100 / 100
13 ms4700 KiB
/************************************* * author: marvinthang * * created: 05.12.2023 14:10:57 * *************************************/ #include <bits/stdc++.h> using namespace std; #define fi first #define se second #define left ___left #define right ___right #define TIME (1.0 * clock() / CLOCKS_PER_SEC) #define MASK(i) (1LL << (i)) #define BIT(x, i) ((x) >> (i) & 1) #define __builtin_popcount __builtin_popcountll #define ALL(v) (v).begin(), (v).end() #define REP(i, n) for (int i = 0, _n = (n); i < _n; ++i) #define REPD(i, n) for (int i = (n); i-- > 0; ) #define FOR(i, a, b) for (int i = (a), _b = (b); i < _b; ++i) #define FORD(i, b, a) for (int i = (b), _a = (a); --i >= _a; ) #define FORE(i, a, b) for (int i = (a), _b = (b); i <= _b; ++i) #define FORDE(i, b, a) for (int i = (b), _a = (a); i >= _a; --i) #define scan_op(...) istream & operator >> (istream &in, __VA_ARGS__ &u) #define print_op(...) ostream & operator << (ostream &out, const __VA_ARGS__ &u) #ifdef LOCAL #include "debug.h" #else #define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); } #define DB(...) 23 #define db(...) 23 #define debug(...) 23 #endif template <class U, class V> scan_op(pair <U, V>) { return in >> u.first >> u.second; } template <class T> scan_op(vector <T>) { for (size_t i = 0; i < u.size(); ++i) in >> u[i]; return in; } template <class U, class V> print_op(pair <U, V>) { return out << '(' << u.first << ", " << u.second << ')'; } template <size_t i, class T> ostream & print_tuple_utils(ostream &out, const T &tup) { if constexpr(i == tuple_size<T>::value) return out << ")"; else return print_tuple_utils<i + 1, T>(out << (i ? ", " : "(") << get<i>(tup), tup); } template <class ...U> print_op(tuple<U...>) { return print_tuple_utils<0, tuple<U...>>(out, u); } template <class Con, class = decltype(begin(declval<Con>()))> typename enable_if <!is_same<Con, string>::value, ostream&>::type operator << (ostream &out, const Con &con) { out << '{'; for (__typeof(con.begin()) it = con.begin(); it != con.end(); ++it) out << (it == con.begin() ? "" : ", ") << *it; return out << '}'; } // end of template void process(void) { int n, k; cin >> n >> k; vector <int> a(n); REP(i, n) { char c; cin >> c; a[i] = c == 'I' ? 2 : c == 'O'; } int j = 0; vector ptr(3, vector<int>(n)); REP(t, 3) { int cnt = 0; REP(i, n) { if (i) ptr[t][i] = ptr[t][i - 1]; while (ptr[t][i] < n && cnt < k) cnt += a[ptr[t][i]++] == t; if (cnt < k) ptr[t][i] = n + 1; cnt -= a[i] == t; } } int res = n + 1; REP(i, n) { int x = i; REP(t, 3) { x = ptr[t][x]; if (x >= n && t < 2) { x = n + 1; break; } } if (x <= n) res = min(res, x - i - 3 * k); } cout << (res > n ? -1 : res) << '\n'; } int main(void) { ios_base::sync_with_stdio(false); cin.tie(nullptr); // cout.tie(nullptr); file("JOI20_ho_t2"); // int t; cin >> t; while (t--) process(); // cerr << "Time elapsed: " << TIME << " s.\n"; return (0^0); }

Compilation message (stderr)

ho_t2.cpp: In function 'void process()':
ho_t2.cpp:52:6: warning: unused variable 'j' [-Wunused-variable]
   52 |  int j = 0;
      |      ^
ho_t2.cpp: In function 'int main()':
ho_t2.cpp:30:61: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |     #define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
      |                                                      ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
ho_t2.cpp:80:2: note: in expansion of macro 'file'
   80 |  file("JOI20_ho_t2");
      |  ^~~~
ho_t2.cpp:30:94: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |     #define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
      |                                                                                       ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
ho_t2.cpp:80:2: note: in expansion of macro 'file'
   80 |  file("JOI20_ho_t2");
      |  ^~~~
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