Submission #1125268

#TimeUsernameProblemLanguageResultExecution timeMemory
1125268_8_8_Fish 2 (JOI22_fish2)C++20
13 / 100
4099 ms130360 KiB
#include <bits/stdc++.h> using namespace std; typedef long long ll; const int N = (int)1e5 + 12, MOD = 998244353; #define int ll int n, q; set<pair<int, int>> s[N], x[N], y[N]; ll a[N], t[N]; void upd(int pos, int val) { while(pos <= n) { t[pos] += val; pos += pos & -pos; } } ll get(int i) { ll ret = 0; while(i) { ret += t[i]; i -= i & -i; } return ret; } ll get(int l, int r) { if(l > r) return 0; return get(r) - get(l - 1); } int getl(int l, int r) { if(l == 1) return 0; ll s = get(l, r); for(int i = l - 1; i >= 1; i--) { s += a[i]; if(a[i - 1] > s) { return i; } } return 1; } int getr(int l, int r) { if(r == n) return n + 1; ll s = get(l, r); for(int i = r + 1; i <= n; i++) { s += a[i]; if(a[i + 1] > s) { return i; } } return n; } void add(int l, int r) { for(int i = l; i <= r; i++) { s[i].insert({l, r}); } x[l - 1].insert({l, r}); y[r + 1].insert({l, r}); } void del(int l, int r) { for(int i = l; i <= r; i++) { s[i].erase({l, r}); } x[l - 1].erase({l, r}); y[r + 1].erase({l, r}); } void prec() { for(int i = 1; i <= n; i++) { upd(i, a[i]); } for(int i = 0; i <= n; i++) { int r = getr(i + 1, i); while(r <= n) { if(get(i + 1, r) < a[i]) { add(i + 1, r); } else break; r = getr(i + 1, r); } } } void u(int l, ll r) { vector<pair<int, int>> dd; auto _add = [&](set<pair<int, int>> &st) { for(auto [l, r] : st) { dd.emplace_back(l, r); } }; _add(s[l]);_add(x[l]);_add(y[l]); for(auto [l, r] : dd) { del(l, r); } upd(l, -a[l]); a[l] = r; upd(l, a[l]); { int nx = getr(l + 1, l); while(nx <= n) { if(get(l + 1, nx) < a[l]) { add(l + 1, nx); } else break; nx = getr(l + 1, nx); } } { int prv = getl(l, l - 1); while(prv >= 1) { if(get(prv, l - 1) < a[l]) { add(prv, l - 1); } else break; prv = getl(prv, l - 1); } } { int nx = getr(l, l - 1), prv = getl(l + 1, l); while(nx <= n && prv >= 1) { int val = get(prv, nx); if(val >= a[prv - 1]) { prv = getl(prv, nx); } else if(val >= a[nx + 1]) { nx = getr(prv, nx); } else { add(prv, nx); if(a[prv - 1] < a[nx + 1]) { prv = getl(prv, nx); } else { nx = getr(prv, nx); } } } } } const ll inf = (ll)1e18; void test() { cin >> n; a[0] = a[n + 1] = (ll)1e18; for(int i = 1; i <= n; i++) { cin >> a[i]; } prec(); cin >> q; while(q--) { int tp, l, r; cin >> tp >> l >> r; if(tp == 2) { int res = 0; ll x = a[l - 1], y = a[r + 1]; if(l - 1 >= 1) u(l - 1, inf); if(r + 1 <= n) u(r + 1, inf); for(int i = l; i <= r; ++i) { res++; for(auto [tl, tr] : s[i]) { if(tl < l || tr > r) continue; if(tl == l && tr == r) continue; res--; // cout << i << " " << tl << ' ' << tr << '\n'; break; } } cout << res << '\n'; if(l - 1 >= 1) u(l - 1, x); if(r + 1 <= n) u(r + 1, y); } else { u(l, r); } } } int32_t main() { ios_base::sync_with_stdio(false); cin.tie(0); int t = 1; // cin >> t; while(t--) { test(); } }
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