C :

#include <stdio.h>
#include <string.h>
#include <math.h>
int main(void)
{
	int x,y,num,ping,n;
	int i,j,k,m,count;
	int a[100];
	scanf("%d %d",&x,&y);
	for(i=x;i<=y;i++)
	{
		count=0; 
		k=0;
		if(pow(i,2)<=10000000&&pow(i,2)>=1000000)
		{
			ping=pow(i,2);
			while(ping!=0)
			{
			a[k]=ping%10;
			ping=ping/10;
			k++;	
			}
		}
		for(m=0;m<k;m++)
		{
			for(n=0;n<k;n++)
			{
				if(a[n]==a[m])
				{
					count++;
				}
			}
		}
		if(count==7)
		{
			printf("%d\n",i);
		}
	}
	return 0;
}

C++ :

#include<bits/stdc++.h>
using namespace std;
int main(){
	int x,y,i,j,z,s,c;
	char a[8];
	cin>>x>>y;
	for(i=x;i<=y;i++){
		c=0;
		s=i*i;
		sprintf(a,"%d",s);
		for(j=0;j<6;j++){
			for(z=j+1;z<7;z++) if(a[j]==a[z]){
					c++;
					break;
			}		
		}
		if(c==0) cout<<i<<endl;
	}
}

Pascal :

var a:array[1..100] of longint;
    z:boolean;
    b,c,d,i,j,k,x:longint;
begin
read(b,c);
for i:=b to c do
begin
d:=i*i;
j:=1;
while d>0 do
begin
a[j]:=d mod 10;
d:=d div 10;
j:=j+1;
end;
if j=8 then begin
z:=false;
for k:=1 to 6 do
for x:=k+1 to 7 do
if a[k]=a[x] then z:=true;
if z=false then writeln(i);
end;
end;
end.

Java :

import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Scanner;
import java.util.Set;
public class Main{
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner scanner=new Scanner(System.in);
		String numberLine=scanner.nextLine();
		String[] numberArray=numberLine.split(" ");
		int number1=Integer.valueOf(numberArray[0]);
		int number2=Integer.valueOf(numberArray[1]);
		for(int i=number1;i<=number2;i++){
			String numString=String.valueOf((int)Math.pow(i, 2));
			char[] charArray=numString.toCharArray();
			if(charArray.length==7){
				List list=new ArrayList();
				Set set=new HashSet();
				for(int j=0;j<charArray.length;j++){
					list.add(charArray[j]);
					set.add(charArray[j]);
				}
				if(list.size()==set.size()){
					System.out.println(i);
				}
			}
		}
	}
}

Python :

#判断数字是否7位数,传入的n默认是整数
def checkNumSeven(n):
    return len(str(n)) == 7;

# 判断数字是否不相同,传入的n默认是整数
def checkDifference(n):
    n = str(n)
    s = set(n)
    return len(n) == len(s); 

x ,y = map(int,input().split())
for i in range(x,y + 1):
   if checkNumSeven(i * i) and checkDifference(i * i):
       print(i)