#include <bits/stdc++.h>
using namespace std;
#define int int64_t

signed main(void){
    ios::sync_with_stdio(false);
    cin.tie(nullptr); 
    cout.tie(nullptr);
#ifdef HELL_JUDGE
    freopen("input","r",stdin);
    freopen("output","w",stdout);
#endif
    int t; cin >> t; 
    while (t--) {
        int n; cin >> n; 
        string s; cin >> s; 
        deque<char>d; 
        d.push_back(s[0]); 
        map<char,int>m; 
        m['G'] =1;
        m['R'] =2;
        m['B'] =3;
        map<int,char>rm; 
        rm[1] ='G';
        rm[2] ='R';
        rm[3] ='B';
        for(int i=1 ; i<n; ++i) {
            if(d.back() != s[i]) {
                char ch = d.back(); d.pop_back(); 
                ch = rm[m[ch]^m[s[i]]];
                while (!d.empty() && d.back() != ch) {
                    char temp = d.back(); d.pop_back();
                    ch = rm[m[ch]^m[temp]];
                }
                d.push_back(ch);
           } else {
               d.push_back(s[i]);
           }
        }
        cout << d.size() << '\n'; 
    }
    return 0;
}

1
7
RGRRGRR

#include <iostream>
#include <algorithm> 
#include <string> 
//  #include <sstream> 
//  #include <fstream>
//  #include <iomanip> 
#include <chrono> 
#include <numeric>
#include <utility>
#include <functional>
 
#include <bitset>
#include <tuple>
#include <queue>
#include <stack>
#include <vector>
#include <array>
//  #include <unordered_map>
//  #include <unordered_set>
#include <set>
#include <map>
//  #include <deque>
 
#include <climits>
#include <cstring>
#include <cmath>
#include <cassert>
#include <cstdio>
using namespace std;
using namespace std::chrono;
//  using namespace placeholders;
//  using namespace __gnu_pbds;
//  template<typename TypeInfo>
//  using new_set = tree< // find_by_order & order_of_key
//                   TypeInfo ,
//                   null_type ,
//                   less<TypeInfo> ,
//                   rb_tree_tag ,
//                   tree_order_statistics_node_update 
//       > ;
 
void debug_out() { cerr << endl; }
 
template <typename HEAD, typename... TAIL>
void debug_out(HEAD H, TAIL... T) {
  cerr << " " << to_string(H);
  debug_out(T...);
}
 
#ifdef HELL_JUDGE
#define debug(...) cerr << "[" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__)
#else
#define debug(...) 0
#endif
 
 
const int MAXM = (int)1e5+100;
const int MAXN = (int)2e5+100;
const int MOD = (int)1e9+7;
 
 
// default size is considered MAXN
long long arr[MAXN];
vector<int> seg_tree[4*MAXN];
 
 
// BUILD THE SEGMENT TREE 
void build(int current_node , int left_, int right_){
    if(left_ == right_) {
        seg_tree[current_node].push_back(arr[left_]);
        return ;
    }
    int mid_point = left_ + (right_ - left_) / 2;
    build(2*current_node, left_ , mid_point);
    build(2*current_node+1, mid_point+1 , right_);
    merge(
            seg_tree[current_node*2].begin() , seg_tree[2*current_node].end() , 
            seg_tree[current_node*2+1].begin() , seg_tree[2*current_node+1].end(), 
            back_inserter(seg_tree[current_node])
         );
    return ;
}
 
int query(int current_node , int start , int end , int member){
    if(seg_tree[current_node].back() < member){
        return -1;
    }
    if(start == end){
        if(seg_tree[current_node].back() < member){
            return -1;
        }else{
            seg_tree[current_node].back() -= member;
            return start;
        }
    }
    int mid = (start + end) /2;
    int ans=-1;
    if(seg_tree[2*current_node].back() >=member){
        ans = query(2*current_node , start , mid , member);
    }else{
        ans = query(2*current_node+1 ,mid+1 , end , member);
    }
    seg_tree[current_node].clear();
    merge(
            seg_tree[current_node*2].begin() , seg_tree[2*current_node].end() , 
            seg_tree[current_node*2+1].begin() , seg_tree[2*current_node+1].end(), 
            back_inserter(seg_tree[current_node])
         );
    return ans;
}
 
 
int main(void){
#ifdef HELL_JUDGE
    freopen("input","r",stdin);
    freopen("output","w",stdout);
    freopen("error","w",stderr);
#endif 
#ifdef HELL_JUDGE
    auto INITIAL_TIME = high_resolution_clock::now();
#endif 
 
    int n , m; cin >> n >> m; 
    for(int i=0;i<n;++i){
        cin >> arr[i];
    }
    build(1 , 0 , n-1 );
    while(m--){
        int x; cin >> x; 
        cout << query(1 , 0 , n-1 , x) +1 << '\n'; 
    }
 
#ifdef HELL_JUDGE
    auto FINAL_TIME = high_resolution_clock::now();
    cout << "Time : "
        << duration_cast<milliseconds>(FINAL_TIME-INITIAL_TIME).count() 
        << " ms" << '\n'; 
#endif 
    return 0;
}

#include <iostream>
#include <algorithm> 
#include <string> 
//  #include <sstream> 
//  #include <fstream>
//  #include <iomanip> 
#include <chrono> 
#include <numeric>
#include <utility>
#include <functional>
 
#include <bitset>
#include <tuple>
#include <queue>
#include <stack>
#include <vector>
#include <array>
//  #include <unordered_map>
//  #include <unordered_set>
#include <set>
#include <map>
//  #include <deque>
 
#include <climits>
#include <cstring>
#include <cmath>
#include <cassert>
#include <cstdio>
using namespace std;
using namespace std::chrono;
//  using namespace placeholders;
using namespace __gnu_pbds;
template<typename TypeInfo>
using new_set = tree< // find_by_order & order_of_key
        TypeInfo ,
         null_type ,
         greater<TypeInfo> ,
         rb_tree_tag ,
         tree_order_statistics_node_update 
     > ;
 
void debug_out() { cerr << endl; }
 
template <typename HEAD, typename... TAIL>
void debug_out(HEAD H, TAIL... T) {
  cerr << " " << to_string(H);
  debug_out(T...);
}
 
#ifdef HELL_JUDGE
#define debug(...) cerr << "[" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__)
#else
#define debug(...) 0
#endif
 
 
const int MAXM = (int)1e5+100;
const int MAXN = (int)2e5+100;
const int MOD = (int)1e9+7;
 
multiset<int , greater<int>> seg[4*MAXN];
long long arr[MAXN];
void build(int current_node , int start , int end){
    if(start == end){
        seg[current_node].insert(arr[start]);
        return; 
    }
    for(int i=start;i<=end; ++i){
        seg[current_node].insert(arr[i]);
    }
    int mid = (start + end) /2;
    build(2*current_node , start , mid);
    build(2*current_node +1 , mid+1 , end);
}
 
pair<int,int> query(int current  , int start , int end , int member){
    int x = *(seg[current].begin());
    if(x < member){
        return {-1,-1};
    }
    if(start==end){
        pair<int,int>p;
        p.first = x;
        p.second = start;
        seg[current].erase(seg[current].begin());
        if(x-member >0){
            seg[current].insert(x-member);
        }
        return p;
    }
    int mid = (start + end) /2;
    pair<int, int > ans;
    int y = *(seg[2*current].begin());
    if(y >= member){
        ans = query(2*current , start , mid , member);
    }else{
        ans = query(2*current+1 , mid+1 , end , member);
    }
    if(ans.first!=-1 && ans.second!=-1){
        auto itr = seg[current].find(ans.first);
        seg[current].erase(itr);
        if(ans.first - member >=0){
            seg[current].insert(ans.first-member);
        }
    }
    return ans;
}
 
int main(void){
#ifdef HELL_JUDGE
    freopen("input","r",stdin);
    freopen("output","w",stdout);
    freopen("error","w",stderr);
#endif 
#ifdef HELL_JUDGE
    auto INITIAL_TIME = high_resolution_clock::now();
#endif 
 
    int n , m; cin >> n >> m; 
    for(int i=0; i < n; ++i){
        cin >> arr[i];
    }
    build(1 , 0, n-1);
    while(m--){
        int x; cin >> x;
        pair<int,int> a = query(1 , 0 , n-1 , x) ;
        cout << a.second + 1 << '\n';
    }
 
#ifdef HELL_JUDGE
    auto FINAL_TIME = high_resolution_clock::now();
    cout << "Time : "
        << duration_cast<milliseconds>(FINAL_TIME-INITIAL_TIME).count() 
        << " ms" << '\n'; 
#endif 
    return 0;
}