hdu-5703 Desert(水题)

Posted 2020-07-15 LittlePointer

题目链接：

Desert

Time Limit: 2000/1000 MS (Java/Others)    

Memory Limit: 65535/32768 K (Java/Others)

Problem Description

 

A tourist gets lost in the desert with n liters of water. He drinks positive integer units of water each day.

Write a program to calculate how many different ways the tourist can drink up the water.

 

 

Input

 

The first line contains the number of test cases T(T≤10).
Next T lines contain the number n(1≤n≤1000000) for each test case.

 

 

Output

 

Output consists of T lines.
Each line contains the binary number which represents number of different ways to finish up the water specified in the test case.

 

 

Sample Input

 

1

3

 

 

Sample Output

 

100

 

题意：

 

n是多少个不同序列的和？

 

思路：

 

可以发现是2^(n-1)种;

 

AC代码：

#include <bits/stdc++.h>
/*
#include <iostream>
#include <queue>
#include <cmath>
#include <map>
#include <cstring>
#include <algorithm>
#include <cstdio>
*/
using namespace std;
#define Riep(n) for(int i=1;i<=n;i++)
#define Riop(n) for(int i=0;i<n;i++)
#define Rjep(n) for(int j=1;j<=n;j++)
#define Rjop(n) for(int j=0;j<n;j++)
#define mst(ss,b) memset(ss,b,sizeof(ss));
typedef long long LL;
const LL mod=1e9+7;
const double PI=acos(-1.0);
const LL inf=1e18;
const int N=1e6+4;
int n,q;
int main()
{
    int t;
    scanf("%d",&t);
      while(t--)
      {
          scanf("%d",&n);
          n--;
          printf("1");
          while(n--)printf("0");
          printf("\n");
      }
    return 0;
}