题解 | #坐标移动#

#include <iostream>
#include <string>
#include <vector>
using namespace std;

bool check(string s){
    if(s.size() > 3 || s.size() == 0) return false;
    if(s[0] != 'A' && s[0] != 'S' && s[0] != 'W' && s[0] != 'D' ) return false;
    for(int i = 1; i < s.size(); i++){
        if(s[i] < '0' || s[i] > '9') return false;
    }
    return true;
}

int getNumFromString(string s){
    int num = 0;
    for(int i = 1; i < s.size(); i++){
        num = num * 10 + (s[i] - '0');
    }
    return num;
}

int main() {
    string s;
    vector<vector<int>> dir(26);
    dir['A' - 'A'] = {-1,0};
    dir['S' - 'A'] = {0,-1};
    dir['W' - 'A'] = {0,1};
    dir['D' - 'A'] = {1,0};
    while (getline(cin, s)) { // 注意 while 处理多个 case
        int i = 0, n = s.size();
        int x = 0, y = 0;
        while(i < n){
            int pos = s.find(';',i);
            if(pos == string::npos) break;
            string sub = s.substr(i,pos - i);
            i = pos + 1;
            if(!check(sub)) continue;
            //int num = getNumFromString(sub);
            int num = stoi(string(sub.begin() + 1,sub.end()));
            x += dir[sub[0] - 'A'][0] * num;
            y += dir[sub[0] - 'A'][1] * num;
        }
        cout << x << "," << y << endl;
    }
    return 0;
}
// 64 位输出请用 printf("%lld")