标签:数据结构
1.题目描述:点击打开链接
2.解题思路:本题要求根据输入的数据和输出的数据来猜测一种可能的数据结构,备选答案有“栈,队列,优先队列”,结果也可能都不是或者不确定。STL中已经有这三种数据结构了,因此直接模拟题意,输出时判断是否对应即可。注意:弹出时要判断一下是否已经为空。
3.代码:
#define _CRT_SECURE_NO_WARNINGS #include<iostream> #include<algorithm> #include<string> #include<sstream> #include<set> #include<vector> #include<stack> #include<map> #include<queue> #include<deque> #include<cstdlib> #include<cstdio> #include<cstring> #include<cmath> #include<ctime> #include<functional> using namespace std; stack<int>s; queue<int>q; priority_queue<int>p; char st[][20] = { "impossible", "priority queue", "queue","not sure" , "stack", "not sure","not sure" ,"not sure" }; void clear() { while (!s.empty())s.pop(); while (!q.empty())q.pop(); while (!p.empty())p.pop(); } void add(int x) { s.push(x); q.push(x); p.push(x); } void pop() { if (!s.empty())s.pop(); if (!q.empty())q.pop(); if (!p.empty())p.pop(); } int main() { //freopen("t.txt", "r", stdin); int n; while (~scanf("%d", &n)) { clear(); int ok1, ok2, ok3; ok1 = ok2 = ok3 = 1; for (int i = 0; i < n; i++) { int a, b; cin >> a >> b; if (a == 1)add(b);//统一添加 else { if (s.empty() || s.top() != b) ok1 = 0; if (q.empty() || q.front() != b) ok2 = 0; if (p.empty() || p.top() != b) ok3 = 0; pop();//统一弹出 } } int x = (ok1 << 2) | (ok2 << 1) | ok3;//编码,方便输出结果 printf("%s\n", st[x]); } return 0; }
标签:数据结构
原文地址:http://blog.csdn.net/u014800748/article/details/44308787