Submission #491686

#	Time	Username	Problem	Language	Result	Execution time	Memory
491686		Yazan_Alattar	Cake (CEOI14_cake)	C++14	0 / 100	407 ms	6108 KiB

cake

#include <iostream>
#include <fstream>
#include <vector>
#include <cstring>
#include <algorithm>
#include <set>
#include <map>
#include <queue>
#include <list>
#include <utility>
#include <cmath>
#include <numeric>
using namespace std;
typedef long long ll;
#define F first
#define S second
#define pb push_back
#define endl "\n"
#define all(x) x.begin(), x.end()
const int M = 250007;
const ll inf = 1e18;
const ll mod = 1e9 + 7;
const double pi = acos(-1);
const int dx[] = {1, 0, -1, 0}, dy[] = {0, 1, 0, -1};

int n, a, q, seg[4 * M], cur, pos[4 * M];

void upd(int i, int v, int node = 1, int l = 1, int r = n)
{
    if(l == r){
        seg[node] = v;
        return;
    }
    int mid = (l + r) / 2;
    if(i <= mid) upd(i, v, 2 * node, l, mid);
    else upd(i, v, 2 * node + 1, mid + 1, r);
    seg[node] = max(seg[2 * node], seg[2 * node + 1]);
    return;
}

int get(int st, int en, int node = 1, int l = 1, int r = n)
{
    if(l > en || r < st) return 0;
    if(l >= st && r <= en) return seg[node];
    int mid = (l + r) / 2;
    return max(get(st, en, 2 * node, l, mid), get(st, en, 2 * node + 1, mid + 1, r));
}

int findr(int st, int en, int v, int node = 1, int l = 1, int r = n)
{
    if(l > en || r < st || seg[node] < v) return -1;
    if(l == r) return l;
    int mid = (l + r) / 2;
    int ret = findr(st, en, v, 2 * node + 1, mid + 1, r);
    if(ret == -1) ret = findr(st, en, v, 2 * node, l, mid);
    return ret;
}

int findl(int st, int en, int v, int node = 1, int l = 1, int r = n)
{
    if(l > en || r < st || seg[node] < v) return -1;
    if(l == r) return l;
    int mid = (l + r) / 2;
    int ret = findl(st, en, v, 2 * node, l, mid);
    if(ret == -1) ret = findl(st, en, v, 2 * node + 1, mid + 1, r);
    return ret;
}

int main()
{
    ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    cin >> n >> a;
    for(int i = 1; i <= n; ++i){
        int x;
        cin >> x;
        upd(i, x);
        pos[x] = i;
    }
    cur = n;
    cin >> q;
    while(q--){
        char c;
        cin >> c;
        if(c == 'F'){
            int x;
            cin >> x;
            if(x == a) cout << 0 << endl;
            else if(x > a){
                int res = get(a + 1, x), ans = x - a;
                if(a != 1){
                    int add = findr(1, a - 1, res);
                    if(add == -1) add = 0;
                    ans += a - add - 1;
                }
                cout << ans << endl;
            }
            else{
                int res = get(x, a - 1), ans = a - x;
                if(a != n){
                    int add = findl(a + 1, n, res);
                    if(add == -1) add = n + 1;
                    ans += add - a - 1;
                }
                cout << ans << endl;
            }
        }
        else{
            int id, x;
            cin >> id >> x;
            x = cur - x + 2;
            for(int i = cur; i >= x; --i){
                upd(pos[i], i + 1);
                pos[i + 1] = pos[i];
            }
            upd(id, x);
            pos[x] = id;
            ++cur;
        }
    }
    return 0;
}
// Don't forget special cases. (n = 1?)
// Look for the constraints. (Runtime array? overflow?)

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