速算24点 Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Problem Description 速算24点相信绝大多数人都玩过.就是随机给你四张牌,包括A(1),2,3,4,5,6,7,8,9,10,J(11),Q(12),K(13).要求只用'+','-','*','/'运算符以及括号改变运算顺序,使得最终运算结果为24(每个数必须且仅能用一次).游戏很简单,但遇到无解的
import scipy from sklearn.datasets import load_digits from sklearn.metrics import classification_report from sklearn.linear_model import LogisticRegression from sklearn.model_selection import train_test_split from sklearn.model_selection import GridS
Channel Allocation Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 13357 Accepted: 6836 Description When a radio station is broadcasting over a very large area, repeaters are used to retransmit the signal so that every receiver has a s
PEP 324 -- subprocess 新的进程模块(subprocess - New process module) 英文原文:https://www.python.org/dev/peps/pep-0324/ 采集日期:2021-05-13 PEP: 324 Title: subprocess - New process module Version: $Revision$ Author: Peter Astrand astrand@lysator.liu.se Status: Fina
是当y的组合数较小时,暴力枚举所有组合,然后用中国剩余定理求每种组合的解,对解进行排序即可 注意初始解可能是负数,所以如果凑不够S个,就对所有解加上M,2M.... 当y的组合数较大时,选择一个k/x最小的序列,枚举N=x*t+y,外层枚举t,内层枚举y,然后验证N是否是可行解 为什么要选k/x最小的:就是相对于x,k越小越好,使更多机会枚举t, #include<bits/stdc++.h> #include<vector> #include<set> using n