제출 #1046062

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1046062		dilanyan	Sprinklers (CEOI24_sprinklers)	C++17	0 / 100	6 ms	8796 KiB

Main

//-------------dilanyan------------\\ 
 
#define _CRT_SECURE_NO_WARNINGS
#include<bits/stdc++.h>
#include<stdio.h>
using namespace std;
 
//------------------Kargpefines--------------------\\ 
 
#define ll long long
#define pb push_back
#define all(u) (u).begin(), (u).end()
#define pqueue priority_queue
#define upper upper_bound
#define lower lower_bound
#define umap unordered_map
#define uset unordered_set
 
void KarginSet(string name = "") {
    ios_base::sync_with_stdio(false); cin.tie(NULL);
    if (name.size()) {
        freopen((name + ".in").c_str(), "r", stdin);
        freopen((name + ".out").c_str(), "w", stdout);
    }
}
 
//-------------------KarginConstants------------------\\ 
 
const ll mod = 1e9 + 7;
const ll inf = 2e9;
 
//-------------------KarginCode-----------------------\\ 
 
const int N = 500005, M = 1000005;

int n, m;

int s[N], f[N];

int tree[4 * N], add[4 * N];

struct segtree {

    int size = 1;

    void init() {
        while (size < m) size <<= 1;
    }

    void push(int x, int lx, int rx) {
        if (rx - lx == 1) return;
        if (tree[x] == 0) {
            tree[2 * x + 1] = tree[2 * x + 2] = 0;
        }
        else if (tree[x] == min(m, rx) - lx) {
            int mid = (lx + rx) / 2;
            tree[2 * x + 1] = min(mid, m) - lx;
            tree[2 * x + 2] = min(rx, m) - min(mid, m);
        }
    }

    void set(int l, int r, int v, int x, int lx, int rx) {
        push(x, lx, rx);
        if (lx >= r || rx <= l) return;
        if (lx >= l && rx <= r) {
            tree[x] = v * (rx - lx);
            return;
        }
        int mid = (lx + rx) / 2;
        set(l, r, v, 2 * x + 1, lx, mid);
        set(l, r, v, 2 * x + 2, mid, rx);
        tree[x] = tree[2 * x + 1] + tree[2 * x + 2];
    }

    void set(int l, int r, int v) {
        set(l, r,v , 0, 0, size);
    }

    int get(int l, int r, int x, int lx, int rx) {
        push(x, lx, rx);
        if (lx >= r || rx <= l) return 0;
        if (lx >= l && rx <= r) return tree[x];
        int mid = (lx + rx) / 2;
        int getl = get(l, r, 2 * x + 1, lx, mid),
            getr = get(l, r, 2 * x + 2, mid, rx);
        return getl + getr;
    }

    int get(int l, int r) {
        return get(l, r, 0, 0, size);
    }

};

void KarginSolve() {
    cin >> n >> m;
    for (int i = 0;i < n;i++) cin >> s[i];
    for (int i = 0;i < m;i++) cin >> f[i];
    ll l = 0, r = 1e9, ans = -1;
    segtree st;
    st.init();
    while (l <= r) {
        ll mid = (l + r) / 2;
        st.set(0, m, 0);
        assert(tree[0] != 0);
        for (int i = 0;i < n;i++) {
            int sp = lower(f, f + m, s[i] - mid) - f;
            int ep = upper(f, f + m, s[i]) - f;
            if (st.get(sp, ep) != ep - sp) {
                st.set(sp, ep, 1);
            }
            else {
                sp = lower(f, f + m, s[i]) - f;
                ep = upper(f, f + m, s[i] + mid) - f;
                st.set(sp, ep, 1);
            }
        }
        if (tree[0] == m) {
            r = mid - 1;
            ans = mid;
        }
        else l = mid + 1;
    }
    if (ans == -1) cout << -1 << '\n';
    else {
        cout << ans << '\n';
        st.set(0, m, 0);
        for (int i = 0;i < n;i++) {
            int sp = lower(f, f + m, s[i] - ans) - f;
            int ep = upper(f, f + m, s[i]) - f;
            if (st.get(sp, ep) != ep - sp) {
                st.set(sp, ep, 1);
                cout << 'L';
            }
            else {
                sp = lower(f, f + m, s[i]) - f;
                ep = upper(f, f + m, s[i] + ans) - f;
                st.set(sp, ep, 1);
                cout << 'R';
            }
        }
        cout << '\n';
    }
}

int main() {
    KarginSet();
    int test = 1;
    //cin >> test;
    while (test--) {
        KarginSolve();
    }
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

Main.cpp:1:1: warning: multi-line comment [-Wcomment]
    1 | //-------------dilanyan------------\\
      | ^
Main.cpp:8:1: warning: multi-line comment [-Wcomment]
    8 | //------------------Kargpefines--------------------\\
      | ^
Main.cpp:27:1: warning: multi-line comment [-Wcomment]
   27 | //-------------------KarginConstants------------------\\
      | ^
Main.cpp:32:1: warning: multi-line comment [-Wcomment]
   32 | //-------------------KarginCode-----------------------\\
      | ^
Main.cpp: In function 'void KarginSet(std::string)':
Main.cpp:22:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 |         freopen((name + ".in").c_str(), "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:23:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |         freopen((name + ".out").c_str(), "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 0: 0 / 0
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• Subtask 4: 0 / 27
• Subtask 5: 0 / 47