제출 #58046

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
58046		fredbr	케이크 (CEOI14_cake)	C++17	50 / 100	2079 ms	6596 KiB

cake

#include <bits/stdc++.h>
 
using namespace std;
 
const int maxn = 250001;
 
int n, a;
int v[maxn];
int d[maxn];
 
vector<int> ans;
 
inline void f()
{
	ans = {a};
 
	int l = a-1, r = a+1;
	d[a] = 0;
 
	for (int i = 1; i < n; i++) {
 
		if (l > 0 and r <= n) {
			if (v[l] < v[r])
				d[l] = i, l--, ans.push_back(l+1);
			else 
				d[r] = i, r++, ans.push_back(r-1);
		}
		else if (l == 0)
			d[r] = i, r++, ans.push_back(r-1);
		else d[l] = i, l--, ans.push_back(l+1);
	}
}
 
inline void fix(int pos, int x, int old)
{
	for (int i = 1; i <= n; i++) {
 
		if (i == pos) continue;
		if (v[i] <= x and v[i] > old)
			v[i]--;
	}
	v[pos] = x;
}

int inv[maxn];
int mrk[maxn];
deque<int> q;

void fix2()
{
	memset(mrk, 0, sizeof(mrk));

	deque<int> qq;
	int num = n;
	while (num > 0) {

		if (mrk[q.front()]) {
			q.pop_front();
			continue;
		}
		v[q.front()] = num--;
		mrk[q.front()] = 1;
		qq.push_back(q.front());
		q.pop_front();
	}
	f();
	q = qq;
}

int main()
{
	ios_base::sync_with_stdio(false), cin.tie(0);
 
	cin >> n >> a;
 
	for (int i = 1; i <= n; i++)
		cin >> v[i], inv[v[i]] = i;

	if (n > 25000) f();

	for (int i = 1; i <= n; i++)
		q.push_front(inv[i]);
 
	int Q;
	cin >> Q;
 
	while (Q--) {
 
		char op;
		cin >> op;
 
		if (op == 'E') {
 
			int pos, x;
			cin >> pos >> x;

			if (n > 25000)
				fix(pos, n-x+1, v[pos]), f();
			else {

				set<int> st;
				stack<int> qq;

				while (st.size() <= min(n,10)) {

					if (st.count(q.front())) q.pop_front();
					else {
						qq.push(q.front());
						st.insert(q.front());
						q.pop_front();
					}
				}
				while (!qq.empty())
					q.push_front(qq.top()), qq.pop();

				while (--x) {
					qq.push(q.front()), q.pop_front();
				}
				q.push_front(pos);
				while (!qq.empty())
					q.push_front(qq.top()), qq.pop();
			}
		}
		else {
 
			int pos;
			cin >> pos;
 	
 			if (n > 25000)
				cout <<d[pos] << "\n";
			else {

				fix2();
				cout << d[pos] << "\n";

			}
		}
	}
}

컴파일 시 표준 에러 (stderr) 메시지

cake.cpp: In function 'int main()':
cake.cpp:104:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     while (st.size() <= min(n,10)) {
            ~~~~~~~~~~^~~~~~~~~~~~

• Subtask 1: 15 / 15
• Subtask 2: 15 / 15
• Subtask 3: 20 / 20
• Subtask 4: 0 / 50