1-ag-lite-text-editor

#pragma GCC optimize("Ofast", "unroll-loops")
// #pragma GCC target("avx")
#include <bits/stdc++.h>
using namespace std;

#define int int64_t
#define double __float80
using pii = pair<int, int>;
template <typename T> using Prior = std::priority_queue<T>;
template <typename T> using prior = std::priority_queue<T, vector<T>, greater<T>>;

// #define X first
// #define Y second
#define eb emplace_back
#define ef emplace_front
#define ee emplace
#define pb pop_back
#define pf pop_front
#define ALL(x) begin(x), end(x)
#define RALL(x) rbegin(x), rend(x)
#define SZ(x) ((int)(x).size())

#define fastIO() ios_base::sync_with_stdio(0), cin.tie(0)
template <typename T> void _do(T &&_t) {cerr << _t << "\n";}
template <typename T, typename ...U> void _do(T &&_t, U &&..._u) {cerr << _t << ", ", _do(_u...);}

template <typename T, typename U> bool chmin(T &lhs, U rhs) {return lhs > rhs ? lhs = rhs, 1 : 0;}
template <typename T, typename U> bool chmax(T &lhs, U rhs) {return lhs < rhs ? lhs = rhs, 1 : 0;}

void solve() {
    string S; getline(cin, S);
    int C; cin >> C;

    vector<string> buf;
    for (int q = 1; q <= C; ++q) {
        string op; cin >> op;

        if (op == "COPY") {
            int L, R; cin >> L >> R, --L, --R;
            buf.eb(S.substr(L, R-L+1));
        }

        if (op == "CUT") {
            int L, R; cin >> L >> R, --L, --R;
            buf.eb(S.substr(L, R-L+1));
            S = S.substr(0, L) + S.substr(R+1);
        }

        if (op == "PASTE") {
            int pos; cin >> pos, --pos;
            S = S.substr(0, pos) + buf.back() + S.substr(pos);
            if (SZ(buf) > 1) buf.pb();
        }
    }
    cout << S << "\n";
}

int32_t main() {
    fastIO();

    int t = 1; // cin >> t;
    for (int _ = 1; _ <= t; ++_) {
        solve();
    }

    return 0;
}