This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
// #include "wall.h"
#include <bits/stdc++.h>
using namespace std;
using node = pair<int, int>;
#define mn first
#define mx second
const int inf = 1E9+7;
template<class T> bool ckmin(T& a, const T& b) { return b < a ? a = b, 1 : 0; }
template<class T> bool ckmax(T& a, const T& b) { return a < b ? a = b, 1 : 0; }
struct segtree {
int size = 1;
vector<node> seg, lazy;
vector<int> ans;
void init(int N) {
while (size < N) size *= 2;
seg.assign(2 * size, {0, 0});
lazy.assign(2 * size, {0, 0});
ans.assign(N + 1, 0);
}
void add(int id, int x) {
ckmax(seg[id].mn, x);
ckmax(seg[id].mx, x);
ckmax(lazy[id].mn, x);
ckmax(lazy[id].mx, x);
}
void rem(int id, int x) {
ckmin(seg[id].mn, x);
ckmin(seg[id].mx, x);
ckmin(lazy[id].mn, x);
ckmin(lazy[id].mx, x);
}
void push(int id) {
if (lazy[id].mx != -inf) {
for (int i = 0; i < 2; i++) {
add(id * 2 + i, lazy[id].mx);
}
}
if (lazy[id].mn != inf) {
for (int i = 0; i < 2; i++) {
rem(id * 2 + i, lazy[id].mn);
}
}
lazy[id] = {inf, -inf};
}
node merge(node lhs, node rhs) {
node rv;
rv.mn = min(lhs.mn, rhs.mn);
rv.mx = max(lhs.mx, rhs.mx);
return rv;
}
void pull(int id) {
seg[id] = merge(seg[id * 2], seg[id * 2 + 1]);
}
void upd(int op, int ql, int qr, int x, int id, int l, int r) {
if (l > qr || r < ql) return;
if (ql <= l && r <= qr) {
if (op == 1) add(id, x);
else rem(id, x);
return;
}
push(id);
int mid = (l + r) / 2;
upd(op, ql, qr, x, id * 2, l, mid);
upd(op, ql, qr, x, id * 2 + 1, mid + 1, r);
pull(id);
}
void upd(int op, int ql, int qr, int x) {
upd(op, ql, qr, x, 1, 0, size - 1);
}
// node query(int ql, int qr, int id, int l, int r) {
// printf("id = %d, l = %d, r = %d\n", id, l, r);
// push(id);
// if (l > qr || r < ql) return {inf, -inf};
// if (ql <= l && r <= qr) return seg[id];
// int mid = (l + r) / 2;
// node lhs = query(ql, qr, id * 2, l, mid);
// node rhs = query(ql, qr, id * 2 + 1, mid + 1, r);
// return merge(lhs, rhs);
// }
// node query(int ql, int qr) {
// return query(ql, qr, 1, 0, size - 1);
// }
void calc(int id, int l, int r) {
if (l == r) ans[l] = seg[id].mn;
else {
push(id);
int mid = (l + r) / 2;
calc(id * 2, l, mid);
calc(id * 2 + 1, mid + 1, r);
}
}
void calc() {
calc(1, 0, size - 1);
}
};
void buildWall(int n, int k, int op[], int left[], int right[], int height[], int finalHeight[]) {
segtree st;
st.init(n);
for (int i = 0; i < k; i++) {
st.upd(op[i], left[i], right[i], height[i]);
}
st.calc();
for (int i = 0; i < n; i++) finalHeight[i] = st.ans[i];
}
#ifndef EVAL
int main() {
ios::sync_with_stdio(0);
cin.tie(0); cout.tie(0);
int n, q;
cin >> n >> q;
segtree st;
st.init(n);
while (q--) {
int op, l, r, h;
cin >> op >> l >> r >> h;
st.upd(op, l, r, h);
}
st.calc();
for (int i = 0; i < n; i++) {
cout << st.ans[i] << "\n";
}
return 0;
}
#endif
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