题解 | #手机键盘#

//手机键盘 清华 2024/1/4
#include <iostream>
using namespace std;

int main() {
    string str;
    int len, count;
    int hit_wait[26] = {//数组记录每个字母对应的敲击时间
        1, 2, 3, 1, 2, 3, 1, 2, 3, 1, 2, 3, 1, 2, 3,
        1, 2, 3, 4, 1, 2, 3, 1, 2, 3, 4
    };
    while (cin >> str) {
        count = hit_wait[str[0]-'a'];
        len = str.length();
        for (int i = 1; i < len; i++) {
            count += hit_wait[str[i] - 'a'];
            if((str[i]-str[i-1])==(hit_wait[str[i]-'a']-hit_wait[str[i-1]-'a'])){
                //此处注意判断条件的书写
                count+=2;
            }
        }
        cout << count << endl;
    }
  return 0;
}