题解 | 坐标移动

#include <iostream>
#include <map>
using namespace std;

int main() {
    string str;
    while (getline(cin, str)) { // 注意 while 处理多个 case
        int cmd_found = 0;
        int broken_cmd = 0;  /* if last command is invalid */
        char cmd_char;
        int steps = 0;
        int x = 0;
        int y = 0;
        
        for (auto& ch : str) {
            if (cmd_found == 0) {
                if (broken_cmd) {
                    if (ch == ';') {
                        broken_cmd = 0;
                    }

                    continue;
                }
    
                if (ch == 'W' || ch == 'A' || ch == 'S' || ch == 'D') {
                    cmd_found = 1;
                    steps = 0;
                    cmd_char = ch;
                } else if (ch != ';'){
                    broken_cmd = 1;
                }
            } else {
                if (ch >= '0' && ch <= '9') {
                    steps = steps * 10 + (int)(ch - '0');
                } else if (ch == ';') {
                    if (cmd_char == 'W') {
                        y += steps;
                    } else if (cmd_char == 'A') {
                        x -= steps;
                    } else if (cmd_char == 'S') {
                        y -= steps;
                    } else if (cmd_char == 'D') {
                        x += steps;
                    }

                    cmd_found = 0;
                    broken_cmd = 0;
                } else {
                    cmd_found = 0;
                    broken_cmd = 1;
                }
            }
            
        }

        cout << x << ',' << y << endl;
    }
}
// 64 位输出请用 printf("%lld")