HDU 5914 Triangle 【构造】 (2016中国大学生程序设计竞赛(长春))

Triangle

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)

Total Submission(s): 2    Accepted Submission(s): 1

Problem Description

Mr. Frog has n sticks, whose lengths are 1,2, 3⋯n respectively. Wallice is a bad man, so he does not want Mr. Frog to form a triangle with three of the sticks here. He decides to steal some sticks! Output the minimal number of sticks he should steal so that Mr. Frog cannot form a triangle with
any three of the remaining sticks.

 

Input

The first line contains only one integer T (T≤20), which indicates the number of test cases. 

For each test case, there is only one line describing the given integer n (1≤n≤20).

 

Output

For each test case, output one line “Case #x: y”, where x is the case number (starting from 1), y is the minimal number of sticks Wallice should steal.

 

Sample Input

3456

 

Sample Output

Case #1: 1Case #2: 1Case #3: 2

 

Source

2016中国大学生程序设计竞赛（长春）-重现赛

 

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题目链接：

　　http://acm.hdu.edu.cn/showproblem.php?pid=5914

题目大意：

　　给你1~N(N<=20)长度的木棒，求至少拿掉几根使得剩余的木棒构成不了三角形。

题目思路：

　　【模拟】

　　画画前几个就可以得出，剩下的木棒是斐波那契数列1,2,3,5,8,13。N只有20，打表。

////by coolxxx//#include<bits/stdc++.h>#include<iostream>#include<algorithm>#include<string>#include<iomanip>#include<map>#include<stack>#include<queue>#include<set>#include<bitset>#include<memory.h>#include<time.h>#include<stdio.h>#include<stdlib.h>#include<string.h>//#include<stdbool.h>#include<math.h>#define min(a,b) ((a)<(b)?(a):(b))#define max(a,b) ((a)>(b)?(a):(b))#define abs(a) ((a)>0?(a):(-(a)))#define lowbit(a) (a&(-a))#define sqr(a) ((a)*(a))#define swap(a,b) ((a)^=(b),(b)^=(a),(a)^=(b))#define mem(a,b) memset(a,b,sizeof(a))#define eps (1e-10)#define J 10000#define mod 1000000007#define MAX 0x7f7f7f7f#define PI 3.14159265358979323#pragma comment(linker,"/STACK:1024000000,1024000000")#define N 104using namespace std;typedef long long LL;double anss;LL aans,sum;int cas,cass;int n,m,lll,ans;int a[]={0,0,0,0,1,1,2,3,3,4,5,6,7,7,8,9,10,11,12,13,14};int main(){#ifndef ONLINE_JUDGEW//freopen("1.txt","r",stdin);//freopen("2.txt","w",stdout);#endifint i,j,k;//init();//for(scanf("%d",&cass);cass;cass--)for(scanf("%d",&cas),cass=1;cass<=cas;cass++)//while(~scanf("%s",s))//while(~scanf("%d",&n)){scanf("%d",&n);printf("Case #%d: ",cass);printf("%d\n",a[n]);}return 0;}/*////*/