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125 lines
3.0 KiB
C++
125 lines
3.0 KiB
C++
#include <iostream>
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using std::cin;
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using std::cout;
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const char endl = '\n';
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const int N = 1e5 + 5;
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const int mod = 998244353;
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int n, m, delta = 1, sum, ans;
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struct node {
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int l, r, f, s, tag_f_add, tag_f_mul, tag_s_mul;
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node(const int &_l = 0, const int &_r = 0)
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: l(_l), r(_r), f(0), s(0), tag_f_add(0), tag_f_mul(1), tag_s_mul(1) {}
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} tr[N << 2];
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void build(int u, int l, int r) {
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tr[u] = node(l, r);
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if (l == r) return;
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int mid = l + r >> 1;
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build(u << 1, l, mid);
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build(u << 1 | 1, mid + 1, r);
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}
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void push_f_add(int u, int v) {
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tr[u].tag_f_add = (static_cast<long long>(tr[u].tag_f_add) + v) % mod;
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tr[u].f = (static_cast<long long>(tr[u].f) + v) % mod;
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}
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void push_f_mul(int u, int v) {
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tr[u].f = static_cast<long long>(tr[u].f) * v % mod;
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tr[u].tag_f_mul = static_cast<long long>(tr[u].tag_f_mul) * v % mod;
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tr[u].tag_f_add = static_cast<long long>(tr[u].tag_f_add) * v % mod;
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}
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void push_s_mul(int u, int v) {
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tr[u].s = static_cast<long long>(tr[u].s) * v % mod;
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tr[u].tag_s_mul = static_cast<long long>(tr[u].tag_s_mul) * v % mod;
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}
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void pushdown(int u) {
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if (tr[u].tag_f_mul != 1) {
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push_f_mul(u << 1, tr[u].tag_f_mul);
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push_f_mul(u << 1 | 1, tr[u].tag_f_mul);
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tr[u].tag_f_mul = 1;
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}
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if (tr[u].tag_s_mul != 1) {
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push_s_mul(u << 1, tr[u].tag_s_mul);
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push_s_mul(u << 1 | 1, tr[u].tag_s_mul);
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tr[u].tag_s_mul = 1;
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}
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if (tr[u].tag_f_add != 0) {
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push_f_add(u << 1, tr[u].tag_f_add);
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push_f_add(u << 1 | 1, tr[u].tag_f_add);
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tr[u].tag_f_add = 0;
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}
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}
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void modify(int u, int l, int r) {
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if (l <= tr[u].l && tr[u].r <= r) {
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ans = (((static_cast<long long>(ans) - tr[u].s) % mod) + mod) % mod;
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tr[u].s = (static_cast<long long>(tr[u].s) + delta) % mod;
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tr[u].tag_s_mul = (static_cast<long long>(tr[u].tag_s_mul) * 2) % mod;
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push_f_add(u, delta);
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sum = (static_cast<long long>(sum) + tr[u].s) % mod;
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return;
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}
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if (tr[u].l > r || tr[u].r < l) {
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ans = (((static_cast<long long>(ans) - tr[u].s) % mod) + mod) % mod;
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tr[u].s = (static_cast<long long>(tr[u].s) + tr[u].f) % mod;
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tr[u].tag_s_mul = (static_cast<long long>(tr[u].tag_s_mul) * 2) % mod;
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push_f_mul(u, 2);
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sum = (static_cast<long long>(sum) + tr[u].s) % mod;
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return;
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}
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pushdown(u);
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ans = (((static_cast<long long>(ans) - tr[u].s) % mod) + mod) % mod;
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sum = (static_cast<long long>(sum) + tr[u].s) % mod;
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modify(u << 1, l, r);
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modify(u << 1 | 1, l, r);
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}
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int main() {
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std::ios::sync_with_stdio(false);
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cin.tie(nullptr);
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cin >> n >> m;
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build(1, 1, n);
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while (m--) {
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int op;
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cin >> op;
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if (op == 1) {
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int l, r;
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cin >> l >> r;
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sum = 0;
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modify(1, l, r);
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ans = (2ll * ans + sum) % mod;
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delta = 2ll * delta % mod;
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} else { // op == 2
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cout << ans << endl;
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}
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}
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return 0;
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}
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