题解 | #手机键盘#

#include <cstdio>
#include <map>
#include <string>
using namespace std;

int main() {
    int a, b;
    map<char, int> InputTime = {
        {'a',1},{'b',2},{'c',3},
        {'d',1},{'e',2},{'f',3},
        {'g',1},{'h',2},{'i',3},
        {'j',1},{'k',2},{'l',3},
        {'m',1},{'n',2},{'o',3},
        {'p',1},{'q',2},{'r',3},{'s',4},
        {'t',1},{'u',2},{'v',3},
        {'w',1},{'x',2},{'y',3},{'z',4}
    };
    map<char, int> keyMap = {
        {'a',2},{'b',2},{'c',2},
        {'d',3},{'e',3},{'f',3},
        {'g',4},{'h',4},{'i',4},
        {'j',5},{'k',5},{'l',5},
        {'m',6},{'n',6},{'o',6},
        {'p',7},{'q',7},{'r',7},{'s',7},
        {'t',8},{'u',8},{'v',8},
        {'w',9},{'x',9},{'y',9},{'z',9}
    };
    char input[101];
    while (scanf("%s",input) != EOF) {
        int lastInput = 1;
        int totalTime = 0;
        for (int i = 0; input[i] != '\0'; ++i) {
            if (lastInput == keyMap[input[i]]) {
                totalTime += 2;
            }
            totalTime += InputTime[input[i]];
            lastInput = keyMap[input[i]];
            
        }
        printf("%d\n",totalTime);
    }
}