`can anyone tell why my second code gives tle, while first gets accepted?? Problem link : https://codeforces.me/contest/2004/problem/D

include <bits/stdc++.h>

using namespace std;

string colors[] = {"BG", "BR", "BY", "GR", "GY", "RY"};

bool hasCommmon(string &a, string &b) { if (a[0] == b[0] || a[1] == b[0] || a[0] == b[1] || a[1] == b[1]) return 1; else return 0; }

void solve() { int n, q; cin >> n >> q;

unordered_map<string, vector<int>> mp;
vector<string> city(n + 1);
for (int i = 0; i < n; i++)
{
    string s;
    cin >> s;
    mp[s].push_back(i + 1);
    city[i + 1] = s;
}

for (int i = 0; i < 6; i++)
{
    auto &v = mp[colors[i]];
    sort(v.begin(), v.end());
}

while (q--)
{
    int x, y;
    cin >> x >> y;

    if (x > y)
        swap(x, y);

    string s1 = city[x];
    string s2 = city[y];

    if (hasCommmon(s1, s2))
    {
        cout << abs(x - y) << "\n";
    }
    else
    {
        int ans = 1e9;
        for (int i = 0; i < 6; i++)
        {
            if (colors[i] == s1 || colors[i] == s2)
                continue;

            auto &v = mp[colors[i]];
            auto it = lower_bound(v.begin(), v.end(), x);
            if (it != v.end())
            {
                ans = min(ans, abs(x - *it) + abs(*it - y));
            }
            if (it != v.begin())
            {
                it--;
                ans = min(ans, abs(x - *it) + abs(*it - y));
            }
        }
        cout << ((ans == 1e9) ? -1 : ans) << "\n";
    }
}

}

signed main() { ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0); int t; cin >> t; while (t--) solve(); exit(0); } ``` </ spoiler>

include <bits/stdc++.h>

using namespace std;

define endl '\n'

using ll = long long;

define pb push_back

define popb pop_back

define lb lower_bound

define ub upper_bound

define int long long

int intersect(string a, string b) { if (a[0] == b[0] || a[0] == b[1] || a[1] == b[0] || a[1] == b[1]) return 1; else return 0; }

void solve() { int n, q; cin >> n >> q; unordered_map<string, vector> mp; vector col(n + 1); for (int i = 0; i < n; i++) { string s; cin >> s; mp[s].pb(i); col[i] = s; } for (auto it : mp) sort(it.second.begin(), it.second.end()); while (q--) { int x, y; cin >> x >> y; if (x > y) swap(x, y);

x--;
    y--;
    string a, b;

    a = col[x];
    b = col[y];

    if (intersect(a, b))
    {
        cout << abs(x - y) << endl;
        continue;
    }
    int ans = 1e9;
    for (auto it : mp)
    {
        if (it.first == a || it.first == b)
            continue;
        auto pos = lower_bound(it.second.begin(), it.second.end(), x);
        if (pos != it.second.end())
            ans = min(ans, abs(*pos - x) + abs(*pos - y));
        if (pos != it.second.begin())
        {
            pos--;
            ans = min(ans, abs(*pos - x) + abs(*pos - y));
        }
    }
    if (ans == 1e9)
        cout << -1 << endl;
    else
        cout << ans << endl;
}

}

signed main() { ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0); int tt; cin >> tt; while (tt--) solve(); } ``` </ spoiler>