题解 | #计算某字符出现次数#

#include <iostream>
using namespace std;
#include <string>
#include <unordered_set>

int main() {
    string s;
    char ss;
    getline(cin,s);
    cin >> ss;
    int count = 0;
    unordered_multiset<char> set;
    for(char sss : s) {
        set.insert(tolower(sss));
    }
    count = set.count(tolower(ss));
    cout << count;
}
// 64 位输出请用 printf("%lld")