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https://git.sb/baoshuo/OI-codes.git
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107 lines
2.1 KiB
C++
107 lines
2.1 KiB
C++
#include <bits/stdc++.h>
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using std::cin;
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using std::cout;
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using std::endl;
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int n, m, op, l, r, x, a[100005];
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// Segment Tree
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void pushup(int);
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void build(int, int, int);
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void modify(int, int, int, int);
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void modify(int, int, int);
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long long query(int, int, int);
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signed main() {
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std::ios::sync_with_stdio(false);
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cin >> n >> m;
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for (int i = 1; i <= n; i++) {
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cin >> a[i];
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}
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build(1, 1, n);
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while (m--) {
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cin >> op >> l >> r;
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if (op == 1) {
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cout << query(1, l, r) << endl;
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} else if (op == 2) {
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cin >> x;
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modify(1, l, r, x);
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} else {
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modify(1, l, r);
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}
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}
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return 0;
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}
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// === Segment Tree ===
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struct node {
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int l, r;
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long long s, m;
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node()
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: l(0),
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r(0),
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s(0),
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m(0) {}
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node(int _l, int _r)
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: l(_l),
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r(_r),
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s(0),
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m(0) {}
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} tr[100005 << 2];
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inline void pushup(int u) {
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tr[u].s = tr[u << 1].s + tr[u << 1 | 1].s;
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tr[u].m = std::max(tr[u << 1].m, tr[u << 1 | 1].m);
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}
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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) {
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tr[u].s = tr[u].m = a[l];
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return;
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}
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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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pushup(u);
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}
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void modify(int u, int x, int d) {
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if (tr[u].l == x && tr[u].r == x) {
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tr[u].s = tr[u].m = d;
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return;
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}
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int mid = tr[u].l + tr[u].r >> 1;
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if (x <= mid) {
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modify(u << 1, x, d);
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} else {
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modify(u << 1 | 1, x, d);
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}
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pushup(u);
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}
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void modify(int u, int l, int r, int d) {
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if (tr[u].m < d) return;
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if (tr[u].l == tr[u].r) {
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tr[u].s = tr[u].m %= d;
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return;
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}
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int mid = tr[u].l + tr[u].r >> 1;
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if (l <= mid) modify(u << 1, l, r, d);
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if (r > mid) modify(u << 1 | 1, l, r, d);
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pushup(u);
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}
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long long query(int u, int l, int r) {
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if (l <= tr[u].l && tr[u].r <= r) return tr[u].s;
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int mid = tr[u].l + tr[u].r >> 1;
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long long sum = 0;
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if (l <= mid) sum += query(u << 1, l, r);
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if (r > mid) sum += query(u << 1 | 1, l, r);
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return sum;
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}
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