A. Summer Camp
time limit per test
memory limit per test
input
output
Every year, hundreds of people come to summer camps, they learn new algorithms and solve hard problems.
1 are written in one line. The prefix of these line is "123456789101112131415...". Your task is to print the n-th digit of this string (digits are numbered starting with 1.
Input
n (1 ≤ n ≤ 1000) — the position of the digit you need to print.
Output
n-th digit of the line.
Examples
input
3
output
3
input
11
output
0
Note
3 is '3', as both integers 1 and 2
11 is '0', it belongs to the integer 10.
#include<bits/stdc++.h>
#include<cstdlib>
using namespace std;
template<typename T> string toString(const T& t){
ostringstream oss; //创建一个格式化输出流
oss<<t; //把值传递如流中
return oss.str();
}
int main()
{
string str;
int i=1;
string s;
while(1)
{
s=toString(i);
str=str+s;
if(str.length()>=1000)
break;
i++;
}
int n;
scanf("%d",&n);
cout<<str[n-1]<<endl;
return 0;
}
