1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
#include <iostream>

using namespace std;

int main() {
    ios_base::sync_with_stdio(false);
    int n;
    cin >> n;
    long long *korg = new long long[n];
    long long *k = new long long[n];
    long long tmp;
    for (int i = 0; i < n; i++) {
        cin >> tmp;
        korg[i] = k[i] = tmp;
    }
    int m;
    cin >> m;
    char ch;
    int *a = new int[m];
    for (int i = 0; i < m; i++) {
        cin >> ch;
        if (ch=='W') a[i] = 1; else a[i] = -1;
    }

    int kpos = 0;
    int apos = 0;
    long long round = 0;
    bool check = true;

    while (true) {
        round++;
        if (check && round > 1 && kpos == 0 && apos == 0) {
            bool quit = true;
            for (int i = 0; i < n; i++) {
                if (k[i] - korg[i] < 0) quit = false;
            }
            if (quit) {
                cout << "-1";
                delete[] k;
                delete[] korg;
                delete[] a;
                return 0;
            }
            check = false;
        }
        k[kpos] += a[apos];
        if (k[kpos] == 0) {
            cout << round;
            delete[] k;
            delete[] korg;
            delete[] a;
            return 0;
        }
        kpos = (kpos + 1) % n;
        apos = (apos + 1) % m;
    }
}