原创 C. Problem for Nazar（奇偶性質）
Nazar, a student of the scientific lyceum of the Kingdom of Kremland, is known for his outstanding mathematical abiliti
2020-06-04 01:57:07
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原创 E - Birthday Paradox
Sometimes some mathematical results are hard to believe. One of the common problems is the birthday paradox. Suppose yo
2020-06-04 01:57:07
原创 C. Match Points（二分答案）
You are given a set of points x1x1, x2x2, ..., xnxn on the number line. Two points ii and jj can be matched with each o
2020-06-04 01:57:07
1
原创 R - Race to 1 （期望）
Dilu have learned a new thing about integers, which is - any positive integer greater than 1 can be divided by at least
2020-06-04 01:57:07
原创 E - Equal Numbers Gym - 101612E
題目鏈接：http://codeforces.com/gym/101612/attachments 題解:給出來n個數，進行i次操作使得進行i次操作後剩得的不同數字個數最少，注意這n次操作是最優值，這n次操作可能不連續！！！ 那麼我們就想
2020-06-04 01:56:57
5
原创 L - Little Difference Gym - 101612L（二分答案）
題目鏈接：http://codeforces.com/gym/101612/attachments 題解： 先考慮到特殊情況：如果該數是n的次冪的話，肯定能分解成任意個1與對應個2的乘積，此時輸出-1。 在考慮下題意，該數只能被分解成a
2020-06-04 01:56:57
原创 高斯消元
//高斯消元 時間複雜度O(n^3) 使用浮點數計算 #include<iostream> #include<string.h> #include<math.h> using namespace std; const double ep
2019-08-25 13:37:26
原创 w
#include<bits/stdc++.h> using namespace std; typedef long long ll; const int maxn=100010; int a[maxn],dp[maxn][2]; vec
2019-08-06 13:34:32
原创 KMP
#include <stdio.h> #include <stdlib.h> #include<map> #include<algorithm> #include<iostream> #include<bits/stdc++.h> us
2019-07-28 13:38:56
原创 E - A New Function LightOJ - 1098
We all know that any integer number n is divisible by 1 and n. That is why these two numbers are not the actual divisor
2019-06-10 13:55:15
原创 頭文件
#include<iostream> #include<stdio.h> #include<iomanip> #include<queue> #include<algorithm> #include<cstring> #include<
2019-06-10 13:55:15
原创 複數運算
#include<iostream> #include<cstring> #include<stdio.h> #include<string> #include<queue> #include<cmath> #include<set>
2019-06-10 13:55:15
原创 E - Round Numbers POJ - 3252
The cows, as you know, have no fingers or thumbs and thus are unable to play Scissors, Paper, Stone' (also known as 'Ro
2019-05-21 13:37:25
原创 D. Almost All Divisors
We guessed some integer number xx. You are given a list of almost all its divisors. Almost all means that there are all
2019-05-21 13:37:25