【Algorithm】GPLT L2-012 关于堆的判断

L2-012 关于堆的判断

必须注意，因为题目要求按照插入的顺序建立，所以是边插入边调整的，必须用向上调整，每次输入一个数之后就将它向上调整。两者建立出来的二叉树不同，而不能采用先转换为二叉树的方式再向下调整。

这里的输入很巧妙~

#include <iostream>
#include <algorithm>
#include <cstring>

using namespace std;

const int N = 1010;

int n, m;
int h[N], p[N], s;

void up(int u)
{
    while (u / 2 && h[u] < h[u / 2])
    {
        swap(h[u], h[u / 2]);
        u >>= 1;
    }
}

int main()
{
    cin >> n >> m;
    
    for (int i = 1; i <= n; i++) {
        cin >> h[i];
        up(i);
    }
    s = n;
    
    while (m--) {
        int a = 0, b = 0, x, y;
        
        char s[20];
        scanf("%d%s", &a, s);
        
        if (!strcmp(s, "and")) {
            scanf("%d%s%s", &b, s, s);
            for (int i = 1; i <= n; i++) {
                if (h[i] == a) x = i;
                if (h[i] == b) y = i;
            }
            if (x / 2 == y / 2) cout << "T" << "\n";
            else cout << "F" << "\n";
        }
        
        else {
            scanf("%s", s);
            if (!strcmp(s, "a")) {
                scanf("%s%s%d", s, s, &b);
                for (int i = 1; i <= n; i++) {
                    if (h[i] == a) x = i;
                    if (h[i] == b) y = i;
                }
                if (x / 2 == y) cout << "T" << "\n";
                else cout << "F" << "\n";
            }
            
            else {
                scanf("%s", s);
                if (!strcmp(s, "root")) {
                    if (h[1] == a) cout << "T" << "\n";
                    else cout << "F" << "\n";
                }
            
                else {
                    scanf("%s%d", s, &b);
                    for (int i = 1; i <= n; i++) {
                        if (h[i] == a) x = i;
                        if (h[i] == b) y = i;
                    }
                    if (x == y / 2) cout << "T" << "\n";
                    else cout << "F" << "\n";
                }
            }
        }
    }
    return  0;
}