题解 | 坐标移动

#include <iostream>
#include "vector"
#include "algorithm"
#include "string"
#include "sstream"
using namespace std;

std::vector<std::string> split(std::string str, char delimiter)
{
    std::vector<std::string> tokens;
    std::stringstream ss(str);
    std::string token;

    while (std::getline(ss, token, delimiter)) {
        tokens.push_back(token);
    }

    return tokens;
}

int main(){
    std::string str;
    std::cin >> str;

    std::vector<std::string> res = split(str, ';');

    int x = 0, y = 0;
    for(int i = 0; i < res.size(); i++){

        if((res[i][0] == 'A' || res[i][0] == 'S' || res[i][0] == 'D' || res[i][0] == 'W')) {
            if (res[i].size() == 2 || res[i].size() == 3) {
                int move = 0;
                if (res[i].size() == 2) {
                    if (res[i][1] >= '0' && res[i][1] <= '9') move = res[i][1] - '0';
                }
                else if (res[i].size() == 3) {
                    if ((res[i][1] >= '0' && res[i][1] <= '9') && (res[i][2] >= '0' && res[i][2] <= '9'))
                        move = (res[i][1] - '0') * 10 + (res[i][2] - '0');
                }

                if (res[i][0] == 'A')x -= move;
                else if (res[i][0] == 'D')x += move;
                else if (res[i][0] == 'W')y += move;
                else if (res[i][0] == 'S')y -= move;
            }
        }

    }

    std::cout  << x << "," << y;
}