#include <iostream>
#include<string>
#include<vector>
#include<unordered_map>
#include <algorithm>
using namespace std;
class Solution {
public:
    bool canConstruct(string ransomNote, string magazine) {
        unordered_map<char, int> num_map;
        for (auto i : magazine)
        {
            num_map[i]++;
        }
        for (auto i : ransomNote)
        {
            num_map[i]--;
            if ( num_map[i]==-1)
                return false;
        }
        return true;
    }
};
int main() {
    Solution a;
    string ransomNote = "a";
    string magazine = "b";
    cout<<a.canConstruct( ransomNote,   magazine);
    return 0;
}