11507 - Bender B. Rodríguez Problem

#include <bits/stdc++.h>

using namespace std;

#define ll long long
#define endl '\n'
#define sz(x) int(x.size())
#define all(x) x.begin(), x.end()

int main() {
    ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
    int L;
    while (scanf("%d\n", &L), L) {
        char dir, sign;
        char last_sign = '+', last_dir = 'x';
        for (int i = 1; i < L; i++) {
            scanf("%c%c%*c", &sign, &dir);
            if (sign == 'N') continue;
            if (last_dir == 'x') {
                last_dir = dir;
                char tmp = (last_sign == '+' ? '-' : '+');
                last_sign = (sign == '-' ? tmp : last_sign);
            }
            else {
                if (dir == last_dir) {
                    last_sign = (last_sign == sign ? '-' : '+');
                    last_dir = 'x';
                }
            }
            //printf("%c%c\n", last_sign, last_dir);
        }
        printf("%c%c\n", last_sign, last_dir);
    }
}