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539 B
539 B
383. Ransom Note
思路
用一个大小为26的数组count记录magazine中26个字母的出现次数,只要每个字母出现次数不小于ransomNote对应字母次数就行了。
C++
class Solution {
public:
bool canConstruct(string ransomNote, string magazine) {
vector<int>count(26);
for(char c: magazine) count[c - 'a']++;
for(char c: ransomNote)
if(0 > --count[c - 'a']) return false;
return true;
}
};