标签:name == second print file turn while ace hdu
题意:给出一个描述自身的数列,求出第n项
思路:看了很久题目才看懂..每个值其实是描述一个分组中的个数,把两个数列对照一下就可以了,那么一个指针扫,同时向尾部加数,构造个数组就行了。其实很水..
/** @Date : 2017-08-15 12:13:59 * @FileName: 1011.cpp * @Platform: Windows * @Author : Lweleth (SoungEarlf@gmail.com) * @Link : https://github.com/ * @Version : $Id$ */ #include <bits/stdc++.h> #define LL long long #define PII pair<int ,int> #define MP(x, y) make_pair((x),(y)) #define fi first #define se second #define PB(x) push_back((x)) #define MMG(x) memset((x), -1,sizeof(x)) #define MMF(x) memset((x),0,sizeof(x)) #define MMI(x) memset((x), INF, sizeof(x)) using namespace std; const int INF = 0x3f3f3f3f; const int N = 1e7+20; const double eps = 1e-8; int a[N] = {0, 1,2,2,1,1,2,1,2,2,1,2,2,1, 1, 2, 1, 1, 2, 2, 1}; int main() { int cnt = 21; for(int i = 14; cnt <= 10000000; i++) { if(a[i] == 0) break; if(a[i] == 1) { a[cnt] = (3 - a[cnt - 1]); cnt++; } else if(a[i] == 2) { a[cnt] = (3 - a[cnt - 1]); a[cnt + 1] = (3 - a[cnt - 1]); cnt += 2; } } int T; cin >> T; while(T--) { int n; scanf("%d", &n); printf("%d\n", a[n]); } return 0; }
标签:name == second print file turn while ace hdu
原文地址:http://www.cnblogs.com/Yumesenya/p/7392134.html