【codeforces 520A】Pangram

【题目链接】:http://codeforces.com/problemset/problem/520/A

【题意】

给你一个字符串.
统计里面有没有出现所有的英文字母->’a’..’z’
每个字母大小写都接受

【题解】

用map写就好;
看看’A’或’a’以及’B’或’b’…有没有出现;
同时没出现的话就返回false;

【完整代码】

#include <bits/stdc++.h>
using namespace std;
#define lson l,m,rt<<1
#define rson m+1,r,rt<<1|1
#define LL long long
#define rep1(i,a,b) for (int i = a;i <= b;i++)
#define rep2(i,a,b) for (int i = a;i >= b;i--)
#define mp make_pair
#define ps push_back
#define fi first
#define se second
#define rei(x) scanf("%d",&x)
#define rel(x) scanf("%lld",&x)
#define ref(x) scanf("%lf",&x)

typedef pair<int, int> pii;
typedef pair<LL, LL> pll;

const int dx[9] = { 0,1,-1,0,0,-1,-1,1,1 };
const int dy[9] = { 0,0,0,-1,1,-1,1,-1,1 };
const double pi = acos(-1.0);
const int N = 110;

map <char, int> dic;
int n;
char s[N];

int main()
{
    //freopen("F:\\rush.txt", "r", stdin);
    rei(n);
    scanf("%s", s + 1);
    rep1(i, 1, n)
        dic[s[i]] = 1;
    for (char a = 'a', A = 'A'; a <= 'z'&&A <= 'Z'; a++, A++)
        if (dic[a] | dic[A])
            continue;
        else
            return puts("NO"), 0;
    puts("YES");
    //printf("\n%.2lf sec \n", (double)clock() / CLOCKS_PER_SEC);
    return 0;
}