C :

#include <stdio.h>
#include <malloc.h>

int main()
{
	int T;
	int *n;
	int tag = 0;

	while (scanf("%d", &T) != EOF)
	{
		tag = 0;
		n = (int *)malloc(T*sizeof(n));
		for (int i = 0; i < T; i++)
		{
			scanf("%d", &n[i]);
			if (n[i] < 32) tag = 1;
		}
		if (tag == 1)
			printf("ERROR!\n");
		else
		{
			for (int i = 0; i < T; i++)
			{
				printf("%c", n[i]);
			}
			printf("\n");
		}
	}
	return 0;
}

C++ :

#include<stdio.h>
int main()
{
	int t;
	while(scanf("%d",&t)!=EOF)
	{
		int a[20];
		int ok=0;
		for (int i=0;i<t;i++)
		{
			scanf("%d",&a[i]);
			if (a[i]<32) ok=1;
		}
		if (ok) printf("ERROR!\n"); 
		else
		{
			for (int i=0;i<t;i++)
				printf("%c",a[i]);
			printf("\n");
		}
	}
	return 0;
}