“华为杯“华南理工大学程序设计竞赛 L-再一道好题

题目

法一：

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define pb push_back
#define fi first
#define se second
const int maxn = 1e6 + 5;
const int inf = 1e9 + 5;

using namespace std;

int n, m;

void solve(){
    int res = 0;
	int q;
    string s;
    int k;
	cin >> n >> q;
    vector<int> tim(n + 5);
    set<pair<int, int>> S;
    int tot = 0;
    for(int i = n; i >= 1; i--){
        tim[i] = ++tot;
        S.insert({tim[i], i});
    }
    while(q--){
        int op, x;
        cin >> op;
        if(op == 1){
            cin >> x;
            S.erase({tim[x], x});
            tim[x] = ++tot;
            S.insert({tim[x], x});
        }
        else{
            auto it = S.begin();
            int t = it -> first, x = it -> second;
            S.erase(S.begin());
            tim[x] = ++tot;
            S.insert({tim[x], x});
        }
    }
    vector<int> a(n + 5);
    int cur = n;
    for(auto [t, x] : S){
        a[x] = cur--;
    }
    for(int i = 1; i <= n; i++){
        cout << a[i] << " \n"[i == n];
    }
}
signed main(){
	ios::sync_with_stdio(0);
	cin.tie(0);

	int T = 1;
	cin >> T;
	while(T--){
		solve();
	}
	return 0;
} 

 法二：

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define pb push_back
#define fi first
#define se second
const int maxn = 1e6 + 5;
const int inf = 1e9 + 5;

using namespace std;

int n, m;

void solve(){
    int res = 0;
	int q;
    string s;
    int k;
	cin >> n >> q;
    vector<int> L(n + 5), R(n + 5);
    for(int i = 1; i <= n; i++){
        L[i] = i - 1;
        R[i] = i + 1;
    }
    int head = 1, tail = n;
    while(q--){
        int op, x;
        cin >> op;
        if(op == 1){
            cin >> x;
        }
        else{
            x = tail;
        }
        if(x == tail){
            tail = L[x];
        }
        if(x == head) continue;//必须特判！！！！！！！！
        R[L[x]] = R[x];
        L[R[x]] = L[x];
        R[x] = head;
        L[x] = 0;
        R[0] = x;
        L[head] = x;
        head = x;
    }
    if(n == 1){
        cout << 1 << '\n';
        return;
    }
    vector<int> a(n + 5);
    int cur = head;
    for(int i = 1; i <= n; i++){
        // pos[i] = cur;
        a[cur] = i;
        cur = R[cur];
    }
    for(int i = 1; i <= n; i++){
        cout << a[i] << " \n"[i == n];
    }
}
signed main(){
	ios::sync_with_stdio(0);
	cin.tie(0);

	int T = 1;
	cin >> T;
	while(T--){
		solve();
	}
	return 0;
}