整体思路:对于每一位,先将当前未达到$limit$部分的段 [如 $0$ ~ $10000$] 直接处理好,到下一位时再处理达到$limit$的部分. · $1 × 10 ^ n$以内每个数(包括$0$)的出现次数的计算 [即已知$bitnum[n - 1]$,求$bitnum[n]$]: 将$bitnum[n - 1]$乘以$10$,代表$n - 1$处最为每个小段在$n$处出现$10$次,再加上$power10[n - 1]$,即加上新增的最高位该数出现次数. · $1 × 10 ^ n$以…

[题目链接] http://poj.org/problem?id=2282 [算法] 数位DP [代码] #include <algorithm> #include <bitset> #include <cctype> #include <cerrno> #include <clocale> #include <cmath> #include <complex> #include <cstdio> #inclu…

Consider the fraction, n/d, where n and d are positive integers. If nd and HCF(n,d)=1, it is called a reduced proper fraction. If we list the set of reduced proper fractions for d  8 in ascending order of size, we get: 1/8, 1/7, 1/6, 1/5, 1/4, 2/7, 1…

Consider the fraction, n/d, where n and d are positive integers. If nd and HCF(n,d)=1, it is called a reduced proper fraction. If we list the set of reduced proper fractions for d  8 in ascending order of size, we get: 1/8, 1/7, 1/6, 1/5, 1/4, 2/7, 1…

/** 题目:UVA 1640 The Counting Problem UVA1640 链接:https://vjudge.net/problem/UVA-1640 题意:求[a,b]或者[b,a]区间内0~9在里面各个数的数位上出现的总次数. 思路:数位dp: dp[leadzero][i][j][k]表示前面是否选过非0数,即i长度之后可以第一个出现0,而不是前导0,长度为i,前面出现j,k次,j出现的次数. */ #include<iostream> #include<cstri…

 Problem 2282 Wand Accept: 432    Submit: 1537Time Limit: 1000 mSec    Memory Limit : 262144 KB Problem Description N wizards are attending a meeting. Everyone has his own magic wand. N magic wands was put in a line, numbered from 1 to n(Wand_i owned…

题目传送门 /* 尺取法:先求出不同知识点的总个数tot,然后以获得知识点的个数作为界限, 更新最小值 */ #include <cstdio> #include <cmath> #include <cstring> #include <algorithm> #include <set> #include <map> using namespace std; ; const int INF = 0x3f3f3f3f; int a[MA…

水两发去建模,晚饭吃跟没吃似的,吃完没感觉啊. ---------------------------分割线"水过....."------------------------------- POJ 3100 Root of the Problem http://poj.org/problem?id=3100 大意: 给定B和N,求一个数A使得A^N最接近B 太水了..... #include<cstdio> #include<cmath> int main()…

The Counting Problem Description 求 [L,R]内每个数码出现的次数. Input Format 若干行,一行两个正整数 L 和 R. 最后一行 L=R=0,表示输入结束. Output Format 若干行,对于每个询问做出回答,每行 10 个整数,依次表示 0 至 9 出现的次数. 输入的最后一行不属于询问,因此不必对此做出回答. Sample Input 1 10 114 514 233 666 19260421 19260817 19190504 1989…

题意 Language:DefaultEspañol The Counting Problem Time Limit: 3000MS Memory Limit: 65536K Total Submissions: 5070 Accepted: 2590 Description Given two integers a and b, we write the numbers between a and b, inclusive, in a list. Your task is to calcula…