#include<bits/stdc++.h>
#define int long long
using namespace std;
// #define fin cin
// #define fout cout
ifstream fin("silly.in");
ofstream fout("silly.out");
auto mread = [](){
    int x;
    fin >> x;
    return x;
};
int t = mread(), ans;
signed main(){
    while(t --){
        int n = mread();
        char c[n + 5];
        int a[n + 5], sw = 0, sb = 0;
        for(int i = 1; i <= n; i ++){
            a[i] = mread();
            fin >> c[i];
            if(c[i] == 'B'){
                sb += a[i];
            }
            else if(c[i] == 'W'){
                sw += a[i];
            }
        }
        if(sw == 0 || sb == 0){
            fout << (sw | sb) << "\n";
            continue;
        }
        {
            int tmp = __gcd(sw, sb);
            sw /= tmp, sb /= tmp;
        }
        int w = 0, b = 0, ans = 0;
        for(int i = 1; i <= n; i ++){
            if(c[i] == 'B'){
                if(w % sw == 0 && b * sw < sb * w && (b + a[i]) * sw >= w * sb){
                    int tob = w / sw * sb;
                    a[i] -= tob - b;
                    b = w = 0, ans ++;
                    if(a[i] > 0){
                        i --;
                    }
                }
                else{
                    b += a[i];
                }
            }
            else{
                if(b % sb == 0 && b * sw > sb * w && b * sw <= (w + a[i]) * sb){
                    int tow = b / sb * sw;
                    a[i] -= tow - w;
                    b = w = 0, ans ++;
                    if(a[i] > 0){
                        i --;
                    }
                }
                else{
                    w += a[i];
                }
            }
        }
        fout << ans << "\n";
    }
    return 0;
}