520A

Posted 2022-05-19 ozxics

#include <stdio.h>
#include <string.h>
#include <stdbool.h>
 
int main()

	int n;
	scanf("%d", &n);
	char line[120];
	scanf("%s", line);
	int alp[30];
	int Count=0;
	memset(alp, 0, sizeof(alp));
	bool Put=true;
	if(n<26)
	
		printf("NO\n");
		Put=false;
	
	else
	
		int i;
		for(i=0; i<n; ++i)
		
			if((line[i]>=65)&&(line[i]<=90))
			
				if(alp[line[i]-65]==0)
				
					++Count;
					alp[line[i]-65]=1;
				
			
			else
			
				if(alp[line[i]-97]==0)
				
					++Count;
					alp[line[i]-97]=1;
				
			
		
	
	if(Count==26)
		printf("YES\n");
	else
	
		if(Put)
			printf("NO\n");
	
	return 0;