C :

#include<stdio.h>
int Magic(int m);
int main()
{
	int m,ret;
	scanf("%d",&m);
	ret=Magic(m);
	if(ret!=1)
	    printf("The sum you calculated is wrong!\n");
	return 0;
}
int Magic(int m)
{
	int a,b,c,n;
	for(a=1;a<9;a++)
	{
		for(b=1;b<9;b++)
		{
			for(c=1;c<9;c++)
			{
				n=122*a+212*b+221*c;
				if(m==n)
				{
					printf("%d\n",100*a+10*b+c);
					return 1;
				}
			}		
		}
	}
	return 0;
}

C++ :

#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
using namespace std;
int main()
{
	int n;
	scanf("%d",&n);
	for(int a=1;a<=9;++a)
	{
		for(int b=0;b<=9;++b)
		{
			for(int c=0;c<=9;++c)
			{
				if(a*100+c*10+b+b*100+a*10+c+b*100+c*10+a+c*100+a*10+b+c*100+b*10+a==n)
				{
					printf("%d",a*100+b*10+c);
					return 0;
				}
			}
		}
	}
	printf("The sum you calculated is wrong!");
	return 0;
}