题解 | #坐标移动#

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

bool isD(string str) {
    int n = str.size();
    if (n < 2 && n > 3) return false;
    if (str[0] != 'A' && str[0] != 'D' && str[0] != 'W' && str[0] != 'S') 
        return false;
    if (str[1] < '0' || str[1] > '9') return false;
    if (n == 3) {
        if (str[2] < '0' || str[2] > '9') {
            return false;
        } 
    }
    return true;
}

void xy_move(vector<int>& xy, string op) {
    int distance = stoi(op.substr(1, op.size() - 1));
    switch (op[0]) {
    case 'A':
        xy[0] -= distance;
        break;
    case 'D':
        xy[0] += distance;
        break;
    case 'W':
        xy[1] += distance;
        break;
    case 'S':
        xy[1] -= distance;
        break;
    default:
        break;
    }
}

int main() {
    string inp;
    cin >> inp;
    vector<string> inpData;
    int i = 0, j = 0;
    for (; i <= inp.size(); i++) {
        if (i == inp.size() || inp[i] == ';') {
            inpData.push_back(inp.substr(j, i - j));
            j = i + 1;
        }
    }

    vector<int> xy(2);
    for (string k : inpData) {
        if (isD(k)) {
            xy_move(xy, k);
        }
    }
    cout << xy[0] << "," << xy[1];
}
// 64 位输出请用 printf("%lld")

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