题解 | #手机键盘#

#include <iostream>
#include <cstring>
using namespace std;
int a[26] = {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};

int b[26] = {1, 1, 1, 2 , 2, 2, 3, 3, 3, 4, 4, 4, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 8, 8, 8, 8};



int main() {
    string str;

    while(cin >> str){
        int time = 0;
        int last = 0;
        for(int i = 0; i < str.size(); i++){
            int x = str[i] - 'a';
            int lx = str[i-1] - 'a';
            time += a[x];
            if(i > 0){
                time += b[x] != b[lx] ? 0 : 2;
            }
        }
        cout << time <<endl;
    }
    return 0;
}
// 64 位输出请用 printf("%lld")