题解 | #坐标移动#

#include<bits/stdc++.h>

using namespace std;

vector<string> split(char c,string src){
    vector<string> res;
    int sp =0, fp = 0;
    while(fp <src.length()){
        fp = src.find(c,sp);
        res.push_back(src.substr(sp,fp-sp));
        sp = fp + 1;
    }
    return res;
}

bool ok(string s){
    string dir = "ASDW";
    int len =  s.length();
    if(len>3) return false;
    bool ok1 =  s.length() && dir.find(s[0]) < dir.length();
    if(len == 2){
        return ok1 && s[1] >='1' && s[1] <='9';
    }
    if(len == 3){
        return ok1 && s[1] >='1' && s[1] <='9' && s[2]>='0' && s[2] <='9';
    }
    return false;
}

int main(){
    string s;
    cin>>s;
    int x=0,y=0;
    vector<string> ss = split(';', s);
    for(int i=0;i<ss.size();i++){
        //cout<<"ss[i] "<<ss[i]<<endl;
        if(ok(ss[i])){
            //cout<<"ok ss[i] "<<ss[i]<<endl;
            string s_num = ss[i].substr(1);
            int dis = 0;
            for(int j=0;j<s_num.length();j++){
                dis *=10;
                dis += s_num[j] -'0';
            }

            if(ss[i][0] == 'A'){
                x -= dis;
            }else if(ss[i][0] == 'S'){
                y -= dis;
            }else if(ss[i][0] == 'W'){
                y += dis;
            }else if(ss[i][0] == 'D'){
                x += dis;
            }
        }
    }
    cout<<x<<','<<y<<endl;
    return 0;
}