https://leetcode.com/problems/ransom-note/description/
题目
Given an arbitrary ransom note string and another string containing letters from all the magazines, write a function that will return true if the ransom note can be constructed from the magazines ; otherwise, it will return false.
Each letter in the magazine string can only be used once in your ransom note.
Note:
You may assume that both strings contain only lowercase letters.
canConstruct("a", "b") -> false
canConstruct("aa", "ab") -> false
canConstruct("aa", "aab") -> true
题目翻译
题目解析
参考答案
#include <iostream>
#include <string>
using namespace std;
class Solution {
public:
bool canConstruct(string ransomNote, string magazine) {
int aiANSI[128] = { 0 };
for (char c : magazine)
{
aiANSI[c]++;
}
for (char c : ransomNote)
{
if (aiANSI[c] <= 0)
{
return false;
}
else
{
aiANSI[c]--;
}
}
return true;
}
};
int main()
{
Solution o;
cout << o.canConstruct("a", "b") << endl;
cout << o.canConstruct("aa", "aab") << endl;
return 0;
}
