Given a permutation P of 1 to N, YY wants to know whether there exists such three elements P[i 1], P[i 2], P[i 3] that P[i 1]-P[i 2]=P[i 2]-P[i 3], 1<=i 1<i 2<i 3<=N. InputThe first line is T(T<=60), representing the total test cases. Each…
Leetcode 春季打卡活动 第一题:225. 用队列实现栈 Leetcode 春季打卡活动 第一题:225. 用队列实现栈 解题思路 这里用了非常简单的思路,就是在push函数上做点操作,让队头总是最后一个元素即可. 也就是说,每新进一个新元素,就把前面的所有元素逐个弹出放到队尾即可. Talk is cheap . Show me the code . class MyStack { public: queue<int> que; int size,temp; /** Initializ…
Consider equations having the following form: a*x1^2+b*x2^2+c*x3^2+d*x4^2=0 a, b, c, d are integers from the interval [-50,50] and any of them cannot be 0. It is consider a solution a system ( x1,x2,x3,x4 ) that verifies the equation, xi is an intege…
YY's new problem Time Limit: 12000/4000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 5422 Accepted Submission(s): 1522 Problem Description Given a permutation P of 1 to N, YY wants to know whether there exists…
