제출 #1332912

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1332912		retarde	JJOOII 2 (JOI20_ho_t2)	C++20	0 / 100	0 ms	348 KiB

ho_t2

#include <bits/stdc++.h>
using namespace std;

#define pb push_back
#define pf push_front
#define mp make_pair
#define fi first
#define se second
#define int long long
#define all(x) (x).begin(), (x).end()

typedef long double ld;
typedef long long ll;
typedef pair<ll,ll> pll;
typedef pair<int,int> pii;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<bool> vb;
typedef vector<vector<int>> vvi;
typedef vector<vector<bool>> vvb;
typedef vector<vector<ll>> vvll;
typedef vector<string> vs;
typedef vector<vector<string>> vvs;
typedef vector<char> vc;
typedef vector<vector<char>> vvc;
typedef map<int, int> mii;
typedef unordered_map<int, int> umii;

const int mod = 1e9 + 7;
const int inf = INTMAX_MAX;
const bool tc = false;

int bin(int i, int k, vi &y) {
    if (i == y.size()) return i;
    int c = (i ? y[i - 1] : (int)0);
    int lo = i; int hi = y.size();
    while (hi > lo + 1) {
        int mid = (lo + hi) / 2;
        if (y[mid] - c >= k) hi = mid;
        else lo = mid;
    }
    return (hi == y.size() ? y.size() : hi);
}

inline void solve() {
    int n, k;
    cin >> n >> k;
    string s; cin >> s;
    vi jp(n), op(n), ip(n);
    for (int i = 0; i < n; i++) {
        if (s[i] == 'J') jp[i]++;
        else if (s[i] == 'O') op[i]++;
        else ip[i]++;
    }
    for (int i = 1; i < n; i++) {
        jp[i] += jp[i - 1];
        op[i] += op[i - 1];
        ip[i] += ip[i - 1];
    }

    int ans = 1e18;
    for (int i = 0; i < n; i++) {
        if (s[i] != 'J') continue;
        int jc = 0, oc = 0, ic = 0;
        int ptr = bin(i, k, jp); ptr = bin(ptr, k, op); ptr = bin(ptr, k, ip);
        if (ptr != n) ans = min(ans, ptr - i - (3 * k - 1));
    }
    cout << (ans == 1e18 ? -1 : ans) << '\n';
}

void setIO(string s) {
    freopen((s + ".in").c_str(), "r", stdin);
    freopen((s + ".out").c_str(), "w", stdout);
}

signed main() {
    ios::sync_with_stdio(false);
    cout.tie(0);
    cin.tie(0);
    //setIO();

    int t = 1;
    if (tc) {
        cin >> t;
    }

    while (t--) {
        solve();
    }
}

컴파일 시 표준 에러 (stderr) 메시지

ho_t2.cpp: In function 'void setIO(std::string)':
ho_t2.cpp:72:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   72 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ho_t2.cpp:73:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   73 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 1
• Subtask 2: 0 / 12
• Subtask 3: 0 / 87