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 <bits/stdc++.h>
using namespace std;
int n, k, t[300005];
struct SegmentTree {
int lzy[3 * 300005], cnt[3 * 300005], mn[3 * 300005];
void build(int k = 1, int l = 0, int r = n - 1) {
if (l == r) {
if (t[l] > 0) mn[k] = t[l];
else {
mn[k] = INT_MAX;
cnt[k] = 1;
}
return;
}
build(k * 2, l, (l + r) / 2);
build(k * 2 + 1, (l + r) / 2 + 1, r);
cnt[k] = cnt[k * 2] + cnt[k * 2 + 1];
mn[k] = min(mn[k * 2], mn[k * 2 + 1]);
}
void push(int k, int l, int r) {
mn[k] -= lzy[k];
if (l != r) {
lzy[k * 2] += lzy[k];
lzy[k * 2 + 1] += lzy[k];
}
lzy[k] = 0;
}
void update(int k, int l, int r, int i, int j) {
push(k, l, r);
if (l > j || r < i) return;
if (i <= l && r <= j) {
lzy[k]++;
push(k, l, r);
return;
}
update(k * 2, l, (l + r) / 2, i, j);
update(k * 2 + 1, (l + r) / 2 + 1, r, i, j);
cnt[k] = cnt[k * 2] + cnt[k * 2 + 1];
mn[k] = min(mn[k * 2], mn[k * 2 + 1]);
}
void rebuild(int k = 1, int l = 0, int r = n - 1) {
push(k, l, r);
if (mn[k] > 0) return;
if (l == r) {
mn[k] = INT_MAX;
cnt[k] = 1;
return;
}
rebuild(k * 2, l, (l + r) / 2);
rebuild(k * 2 + 1, (l + r) / 2 + 1, r);
cnt[k] = cnt[k * 2] + cnt[k * 2 + 1];
mn[k] = min(mn[k * 2], mn[k * 2 + 1]);
}
int get(int k, int l, int r, int i, int j) {
if (l > j || r < i) return 0;
if (i <= l && r <= j) return cnt[k];
return get(k * 2, l, (l + r) / 2, i, j) + get(k * 2 + 1, (l + r) / 2 + 1, r, i, j);
}
} sgt;
void inicjuj(int _n, int _k, int *D)
{
n = _n, k = _k;
for (int i = 0; i < n; i++) t[i] = k - D[i];
sgt.build();
}
void podlej(int a, int b)
{
sgt.update(1, 0, n - 1, a, b);
sgt.rebuild();
}
int dojrzale(int a, int b)
{
return sgt.get(1, 0, n - 1, a, b);
}
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