8.18下午
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#
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#include <iostream>
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#include<cstdio>
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#include<algorithm>
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#include <cmath>
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using namespace std;
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int main()
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{
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int t;
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scanf("%d",&t);
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while(t--)
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{
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int n;
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scanf("%d",&n);
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for(int i=1;i<=n; i++)
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{
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}
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}
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return 0;
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}
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## z:\Chao\src\Template\test\in.txt
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2020/03/14 ÖÜÁù 11:41:28.68
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Hello Easy C++ project!
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-----------------------------------------------
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Process exited after 200 ms with return value 0
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# J - Leading and Trailing
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* https://vjudge.net/contest/509210#problem/J
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### 题意
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n^k的前3位、后3位n (2 ≤ n < 2^31) and k (1 ≤ k ≤ 10^7).
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### 做法
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1. 后三位快速幂
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2. 前三位10^ (log10(n^k)==k*log10(n)),整数部分决定0的个数,小数部分决定数字 *100取前三位
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### 关键词
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快速幂、求很大的n^k、log10、pow、modf
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### 易错点
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* 快速幂中now=n%mod;//要mod否则会太大10e6*10e6
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* 快速幂忘return
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* //%03d 001 000 补齐1前面的0
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* //没有(int)导致没有输出
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### 工具箱
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* log10(n^k)==k*log10(n)
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* pow(10,cur)==10^cur
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* %03d 001 000 整数用零补齐
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* y=modf(n,&x);n的小数部分给y,整数部分给x
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* 题解 https://www.cnblogs.com/KirinSB/p/9409120.html
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#
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## z:\Chao\src\Template\test\in.txt
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2020/03/14 ÖÜÁù 11:41:28.68
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Hello Easy C++ project!
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-----------------------------------------------
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Process exited after 200 ms with return value 0
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