#include"bits/stdc++.h"
using namespace std;
#define REP(k,m,n) for(int (k)=(m);(k)<(n);(k)++)
#define rep(i,n) REP((i),0,(n))
using ll = long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
using tp3 = tuple<int, int, int>;
using Mat = vector<vector<ll>>;
constexpr int INF = 1 << 28;
constexpr ll INFL = 1ll << 60;
constexpr int dh[4] = { 0,1,0,-1 };
constexpr int dw[4] = { -1,0,1,0 };
bool isin(const int H, const int W, const int h, const int w) {
    return 0 <= h && h < H && 0 <= w && w < W;
}

struct ModInt {
    static const ll MOD = 998244353;

    // constructors etc
    ModInt() :num(1ll) {}
    ModInt(ll num_) :num(num_%MOD) {}
    ModInt(const ModInt& modint) :num(modint.num%MOD) {}
    ll get()const { return num; }

    // operator etc
    // operator ll() const { return num; }
    // ll operator*() { return num; }
    ModInt& operator+=(const ModInt& r) { (num += r.num) %= MOD; return *this; }
    ModInt& operator-=(const ModInt& r) { (num += -r.num + MOD) %= MOD; return *this; }
    ModInt& operator*=(const ModInt& r) { (num *= r.num) %= MOD; return *this; }
    ModInt& operator/=(const ModInt& r) { (num *= r.inv().num) %= MOD; return *this; }
    ModInt pow(const ModInt& r)const {
        ll res = 1;
        ll x = num;
        ll n = r.num;
        while (n > 0) {
            if (n & 1)res = (res*x) % MOD;
            x = (x*x) % MOD;
            n >>= 1;
        }
        return res;
    }
    ModInt inv()const { return this->pow(MOD - 2); }

    ModInt operator+(const ModInt& r)const { return ModInt(*this) += r; }
    ModInt operator-(const ModInt& r)const { return ModInt(*this) -= r; }
    ModInt operator*(const ModInt& r)const { return ModInt(*this) *= r; }
    ModInt operator/(const ModInt& r)const { return ModInt(*this) /= r; }
    ModInt operator+(const ll& r)const { return *this + ModInt(r); }
    ModInt operator-(const ll& r)const { return *this - ModInt(r); }
    ModInt operator*(const ll& r)const { return *this * ModInt(r); }
    ModInt operator/(const ll& r)const { return *this / ModInt(r); }

private:
    ll num;
};
ostream& operator<<(ostream& stream, const ModInt& val) { stream << val.get(); return stream; }

// ============ template finished ============

int main()
{
    int N, Q;
    cin >> N >> Q;
    vector<ll> A(N), B(Q);
    rep(i, N)cin >> A[i];
    sort(A.begin(), A.end());
    reverse(A.begin(), A.end());

    vector<vector<ll>> dp(N, vector<ll>(N + 1, 0));
    dp[0][0] = A[0] - 1;
    dp[0][1] = 1;

    const ll MOD = 998244353;
    REP(i, 1, N) {
        dp[i][0] = dp[i - 1][0] * (A[i] - 1) % MOD;
        REP(j, 1, N + 1) {
            dp[i][j] = (dp[i - 1][j - 1] + dp[i - 1][j] * (A[i] - 1)) % MOD;
        }
    }
    vector<ll> muls = A;
    for (int i = A.size() - 1; i >= 1; i--) {
        (muls[i - 1] *= muls[i]) %= MOD;
    }


    vector<vector<ll>> dp2;
    vector<ll> A2;
    vector<ll> muls2;
    set<ll> used;
    for (int i = N - 1; i >= 0; i--)if (used.find(A[i]) == used.end()) {
        dp2.push_back(dp[i]);
        A2.push_back(A[i]);
        muls2.push_back(muls[i]);
        used.insert(A[i]);
    }
    reverse(dp2.begin(), dp2.end());
    reverse(A2.begin(), A2.end());
    reverse(muls2.begin(), muls2.end());

    // output
    rep(i, Q) {
        ll l, r, p;
        cin >> l >> r >> p;
        int ridx = 0;
        while (ridx<A2.size() - 1 && A2[ridx] > r)ridx++;

        ll res = [&]() {
            if (A2[ridx] == r) {
                return 0ll;
            }
            else {
                ll base = dp2[ridx - 1][p];
                ll diff = [&]() {
                    if (l < A2[ridx])return r - l + 1;
                    else return r - A2[ridx];
                }();
                return base * muls2[ridx] * (diff % 2) % MOD;
            }
        }();
        if (l > A2[ridx]) {
            cout << res % MOD << endl;
            continue;
        }

        while (ridx < A2.size() - 1 && A2[ridx + 1] >= l) {
            ll base = dp2[ridx][p] * muls2[ridx + 1];
            ll diff = A2[ridx] - A2[ridx + 1];
            res ^= (base * (diff % 2) % MOD);
            ridx++;
        }
        ll base = dp2[ridx][p] * (ridx == A2.size() - 1 ? 1 : muls2[ridx + 1]);
        ll diff = A2[ridx] - l + 1;
        res ^= ((base * (diff % 2)) % MOD);
        cout << res % MOD << endl;
    }
    return 0;
}