首页 > 代码库 > find the nth digit

find the nth digit

find the nth digit

Time Limit: 1000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)
Total Submission(s): 880 Accepted Submission(s): 325
 
Problem Description
假设:
S1 = 1
S2 = 12
S3 = 123
S4 = 1234
.........
S9 = 123456789
S10 = 1234567891
S11 = 12345678912
............
S18 = 123456789123456789
..................
现在我们把所有的串连接起来
S = 1121231234.......123456789123456789112345678912.........
那么你能告诉我在S串中的第N个数字是多少吗?
 
Input
输入首先是一个数字K,代表有K次询问。
接下来的K行每行有一个整数N(1 <= N < 2^31)。
 
Output
对于每个N,输出S中第N个对应的数字.
 
Sample Input
61234510
 
Sample Output
112124
 
Author
8600
 
Source
HDU 2007-Spring Programming Contest - Warm Up (1)
 
Recommend
8600
 
/*加到S65536长度就大于2^31了*/#include<bits/stdc++.h>using namespace std;int main(){    //freopen("C:\\Users\\acer\\Desktop\\in.txt","r",stdin);    long long n,t;    scanf("%lld",&t);    while(t--)    {        scanf("%lld",&n);        long long i;        long long s=0;        for(i=1;s<n;i++)            s+=i;        long long cur=n-s+i-1;        if(cur%9)            printf("%d\n",cur%9);        else            puts("9");    }}

 

find the nth digit