#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using mint = atcoder::modint998244353;
using ll = long long;

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);

    int N, X, Q;
    cin >> N >> X >> Q;

    //ここからUnion Find
    vector<int> parent_or_size(N, -1);
    vector<int> weight(N, 1 << 30); //親への辺の重み,初期値は大きい値を入れておく
    vector<mint> ans(N); //連結成分内の頂点対の距離の総和
    auto leader = [&](int v){
        while(parent_or_size[v] >= 0) v = parent_or_size[v];
        return v;
    };

    //distanceは頂点u, 頂点v 間のmax距離を求める関数
    //頂点u, 頂点v から開始して親への辺の重みが小さい順に親を辿る
    //parent_or_size[u] が負の値のときに代表元を越えた判定になるので負の値になったら非連結
    auto distance = [&](int u, int v){
        int ans = 0;
        while(u != v){
            if (weight[u] > weight[v]) swap(u, v);
            ans = weight[u], u = parent_or_size[u];
            if(u < 0) return -1;
        }
        return ans;
    };

    //頂点u, 頂点v を重み w の辺でマージ
    auto merge = [&](int u, int v, int w){
        int x = leader(u), y = leader(v);
        if(x == y) return;
        if(-parent_or_size[x] < -parent_or_size[y]) swap(x, y);
        ans[x] += ans[y] + mint(parent_or_size[x]) * parent_or_size[y] * w;
        parent_or_size[x] += parent_or_size[y];
        parent_or_size[y] = x;
        weight[y] = w; //親への辺の重みを w に更新
    };
    //ここまでUnion Find



    while(Q--){
        int type, u, v, w;
        cin >> type;
        if(type == 1){
            cin >> v >> w;
            merge(v, X, w);
        }else if(type == 2){
            cin >> u >> v;
            v = distance(u, v);
            cout << v << '\n';
            if(v != -1) (X += v) %= N;
        }else if(type == 3){
            cin >> v;
            cout << ans[leader(v)].val() << '\n';
        }else{
            cin >> v;
            (X += v) %= N;
        }
    }
}