hdu-5867 Water problem(水题)

题目链接：

Water problem

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)
Total Submission(s): 23    Accepted Submission(s): 14

Problem Description

If the numbers 1 to 5 are written out in words: one, two, three, four, five, then there are 3+3+5+4+4=19 letters used in total.If all the numbers from 1 to n (up to one thousand) inclusive were written out in words, how many letters would be used?

Do not count spaces or hyphens. For example, 342 (three hundred and forty-two) contains 23 letters and 115 (one hundred and fifteen) contains 20 letters. The use of "and" when writing out numbers is in compliance with British usage.

 

Input

There are multiple test cases. The first line of input contains an integer T, indicating the number of test cases.

For each test case: There is one positive integer not greater one thousand.

 

Output

For each case, print the number of letters would be used.

 

Sample Input

3

1

2

3

 

Sample Output

3

6

11

 

题意：

 

问[1,n]这些数字用英文单词表示的时候一共用了多少个字母;

 

思路：

 

水题;

 

AC代码：

 

#include <iostream>
#include <cstdio>
#include <cstring>
#include <algorithm>
#include <cmath>
#include <bits/stdc++.h>
#include <stack>
#include <map>

using namespace std;

#define For(i,j,n) for(int i=j;i<=n;i++)
#define mst(ss,b) memset(ss,b,sizeof(ss));

typedef  long long LL;

template<class T> void read(T&num) {
    char CH; bool F=false;
    for(CH=getchar();CH<'0'||CH>'9';F= CH=='-',CH=getchar());
    for(num=0;CH>='0'&&CH<='9';num=num*10+CH-'0',CH=getchar());
    F && (num=-num);
}
int stk[70], tp;
template<class T> inline void print(T p) {
    if(!p) { puts("0"); return; }
    while(p) stk[++ tp] = p%10, p/=10;
    while(tp) putchar(stk[tp--] + '0');
    putchar('\n');
}

const LL mod=1e9+7;
const double PI=acos(-1.0);
const int inf=1e9;
const int N=5e5+10;
const int maxn=(1<<20)+14;
const double eps=1e-12;

int dp[1100];

int check(int x)
{
    if(x<=10)
    {
        if(x==1||x==2||x==6||x==10)return 3;
        else if(x==3||x==7||x==8)return 5;
        else if(x==4||x==5||x==9)return 4;
    }
    else if(x<=20)
    {
    if(x==11||x==12||x==20)return 6;
    if(x==13||x==14||x==18||x==19)return 8;
    if(x==15||x==16)return 7;
    if(x==17)return 9;
    }
    else if(x<100)
    {
        if(x%10==0)
        {
            if(x==30||x==80||x==90)return 6;
            else if(x==40||x==50||x==60)return 5;
            else if(x==70)return 7;
        }
        else return check(x%10)+check(x-x%10);
    }
    else if(x<1000)
    {
        if(x%100==0)return check(x/100)+7;
        else return check(x/100)+10+check(x-(x/100)*100);
    }
    else return 11;
}
inline void Init()
{
    for(int i=1;i<=1000;i++)
    {
        dp[i]=dp[i-1]+check(i);
    }
}

int main()
{
    int t;
    Init();
    read(t);
    while(t--)
    {
        int n;
        read(n);
        print(dp[n]);
    }
    return 0;
}