题解 | 手机键盘

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <string.h>
#include <map>
using namespace std;

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> KeyBoard =
{
	{'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}
};


int main()
{
	char str[101];
	while (scanf("%s", str) != EOF)
	{
		int lastTime = 0;
		int totalTime = 0;
		for (int i = 0; str[i] != '\0'; i++)
		{
			if (KeyBoard[str[i]] == lastTime)
			{
				totalTime += 2;
				totalTime += InputTime[str[i]];
			}
			else
			{
				totalTime += InputTime[str[i]];
				lastTime = KeyBoard[str[i]];
			}
		}
		printf("%d\n", totalTime);
	}
	return 0;
}