LightOJ - 1234 分块预处理

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LightOJ - 1234 分块预处理

求∑1/i,但是范围很大和bitmap的想法一样,分个块,均摊复杂度就降下来了 //到底排行榜上的0ms是怎么做到的? #include<bits/stdc++.h> using namespace std; const int maxn = 1e6+11; const int N = 1e8; double tmp[N/128+7]; int main(){ double t=0; for(int i = 1; i <= N; i++){ t+=(double)1/i; if(i%1…

LightOJ 1234 Harmonic Number

D - Harmonic Number Time Limit:3000MS Memory Limit:32768KB 64bit IO Format:%lld & %llu Submit Status Practice LightOJ 1234 Description In mathematics, the nth harmonic number is the sum of the reciprocals of the first n natural numbers: In th…

LightOJ 1234 Harmonic Number (打表)

Harmonic Number Time Limit:3000MS Memory Limit:32768KB 64bit IO Format:%lld & %llu Submit Status Practice LightOJ 1234 Description In mathematics, the nth harmonic number is the sum of the reciprocals of the first n natural numbers: In this p…

LightOJ 1234 Harmonic Number(打表 + 技巧)

http://lightoj.com/volume_showproblem.php?problem=1234 Harmonic Number Time Limit:3000MS Memory Limit:32768KB 64bit IO Format:%lld & %llu Submit Status Practice LightOJ 1234 Description In mathematics, the nth harmonic number is the sum of th…

LightOJ - 1234 LightOJ - 1245 Harmonic Number（欧拉系数+调和级数）

Harmonic Number In mathematics, the nth harmonic number is the sum of the reciprocals of the first n natural numbers: In this problem, you are given n, you have to find Hn. Input Input starts with an integer T (≤ 10000), denoting the number of test c…

1 。 LightOJ 1234 打表法（数据太大，把数据缩小100倍）

原题链接http://acm.hust.edu.cn/vjudge/contest/121397#problem/A Description In mathematics, the nth harmonic number is the sum of the reciprocals of the first n natural numbers: In this problem, you are given n, you have to find Hn. Input Input starts wit…

LightOJ 1234 Harmonic Number 调和级数部分和

题目链接:http://lightoj.com/volume_showproblem.php?problem=1234 Sample Input Sample Output Case : Case : 1.5 Case : 1.8333333333 Case : 2.0833333333 Case : 2.2833333333 Case : 2.450 Case : 2.5928571429 Case : 2.7178571429 Case : 2.8289682540 Case : 18.89…