oj.uz

답안 #589738

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
589738 2022-07-05T08:18:42 Z 8e7 Fish 2 (JOI22_fish2) C++17
31 / 100
 1898 ms 288496 KB 
//Challenge: Accepted
#include <bits/stdc++.h>
using namespace std;
#ifdef zisk
void debug(){cout << endl;}
template<class T, class ... U> void debug(T a, U ... b){cout << a << " ", debug(b...);}
template<class T> void pary(T l, T r) {
	while (l != r) cout << *l << " ", l++;
	cout << endl;
}
#else
#define debug(...) 0
#define pary(...) 0
#endif
#define ll long long
#define maxn 100005
#define pii pair<int, int>
#define ff first
#define ss second
#define io ios_base::sync_with_stdio(0);cin.tie(0);
const int inf = 1<<30;

struct segtree_interval{
	stack<pii> stk[4*maxn];	
	bool in (pii &p, int x) {
		return p.ff <= x && x <= p.ss;
	}
	void remove(int cur, int l, int r, int ind, vector<pii> &v) {
		if (r <= l) return;
		while (stk[cur].size() && in(stk[cur].top(), ind)) {
			v.push_back(stk[cur].top());
			stk[cur].pop();
		}
		int m = (l + r) / 2;
		if (ind < m) remove(cur*2, l, m, ind, v);
		else if (ind > m) remove(cur*2+1, m+1, r, ind, v);
	}
	void ins(int cur, int l, int r, pii p) {
		if (r <= l) return;
		int m = (l + r) / 2;
		if (in(p, m)) {
			stk[cur].push(p);
			return;
		}
		if (m > p.ss) ins(cur*2, l, m, p);
		else if (m < p.ff) ins(cur*2+1, m+1, r, p);
	}
} inter;
struct segtree_mincnt{
	pii seg[4*maxn];
	int tag[4*maxn];
	void init(int cur, int l, int r) {
		if (r <= l) return;
		seg[cur].ss = (r - l);
		if (r - l == 1) return;
		int m = (l + r) / 2;
		init(cur*2, l, m), init(cur*2+1, m, r);
	}
	void push(int cur, int l, int r) {
		seg[cur].ff += tag[cur];
		if (r - l > 1) {
			tag[cur*2] += tag[cur];
			tag[cur*2+1] += tag[cur];
		}
		tag[cur] = 0;
	}
	void merge(pii &a, pii &b, pii &c) {
		a.ff = min(b.ff, c.ff);
		a.ss = (b.ff == a.ff ? b.ss : 0) + (c.ff == a.ff ? c.ss : 0);
	}
	void pull(int cur, int l, int r) {
		int m = (l + r) / 2;
		push(cur*2, l, m), push(cur*2+1, m, r);
		merge(seg[cur], seg[cur*2], seg[cur*2+1]);
	}
	void modify(int cur, int l, int r, int ql, int qr, int v) {
		if (r <= l || ql >= r || qr <= l) return;
		push(cur, l, r);
		if (ql <= l && qr >= r) {
			tag[cur] += v;
			return;
		}
		int m = (l + r) / 2;
		modify(cur*2, l, m, ql, qr, v); 
		modify(cur*2+1, m, r, ql, qr, v); 
		pull(cur, l, r);
	}
	pii query(int cur, int l, int r, int ql, int qr) {
		if (r <= l || ql >= r || qr <= l) return {inf, 0};
		push(cur, l, r);
		if (ql <= l && qr >= r) return seg[cur];
		int m = (l + r) / 2;
		pii ret, vl = query(cur*2, l, m, ql, qr), vr = query(cur*2+1, m, r, ql, qr);
		merge(ret, vl, vr);
		return ret;
	}
} mincnt;

struct segtree{
	ll seg[4*maxn], tag[4*maxn];
	void init(int cur, int l, int r, ll a[]) {
		if (r <= l) return;
		if (r - l == 1) {
			seg[cur] = a[l];
			return;
		}
		int m = (l + r) / 2;
		init(cur*2, l, m, a), init(cur*2+1, m, r, a);
		seg[cur] = max(seg[cur*2], seg[cur*2+1]);
	}
	void push(int cur, int l, int r) {
		seg[cur] += tag[cur];
		if (r - l > 1) {
			tag[cur*2] += tag[cur];
			tag[cur*2+1] += tag[cur];
		}
		tag[cur] = 0;
	}
	void pull(int cur, int l, int r) {
		int m = (l + r) / 2;
		push(cur*2, l, m), push(cur*2+1, m, r);
		seg[cur] = max(seg[cur*2], seg[cur*2+1]);
	}
	void modify(int cur, int l, int r, int ql, int qr, ll x) {
		if (r <= l || ql >= r || qr <= l) return;
		push(cur, l, r);
		if (ql <= l && qr >= r) {
			tag[cur] += x;
			return;
		}
		int m = (l + r) / 2;
		modify(cur*2, l, m, ql, qr, x);
		modify(cur*2+1, m, r, ql, qr, x);
		pull(cur, l, r);
	}
	int search(int cur, int l, int r, int ql, int qr, bool type, ll t) {
		//type 0: left, 1:right
		push(cur, l, r);
		if (r <= l || ql >= r || qr <= l || seg[cur] < t) return -1;
		if (r - l == 1) return l;
		int m = (l + r) / 2;
		if (type) {
			int vr = search(cur*2+1, m, r, ql, qr, type, t);
			if (vr != -1) return vr;
			return search(cur*2, l, m, ql, qr, type, t);
		} else {
			int vl = search(cur*2, l, m, ql, qr, type, t);
			if (vl != -1) return vl;
			return search(cur*2+1, m, r, ql, qr, type, t);
		}
	}
	ll query(int cur, int l, int r, int x) { //getpnt
		if (r <= l) return 0;
		push(cur, l, r);
		if (r - l == 1) return seg[cur];
		int m = (l + r) / 2;
		if (x < m) return query(cur*2, l, m, x);
		else query(cur*2+1, m, r, x);
	}
	void print(int cur, int l, int r) {
		if (r <= l) return;
		push(cur, l, r);
		if (r - l == 1) {
			debug(seg[cur]);
			return;
		}
		int m = (l + r) / 2;
		print(cur*2, l, m);
		print(cur*2+1, m, r);
	}
} tr, lb, rb; 
struct BIT{
	ll bit[maxn];
	void modify(int ind, ll val) {
		ind++;
		for (;ind < maxn;ind += ind & (-ind)) bit[ind] += val;
	}
	ll query(int ind) {
		ll ret = 0;
		ind++;
		for (;ind > 0;ind -= ind & (-ind)) ret += bit[ind];
		return ret;
	}
	ll sum(int l, int r) {
		return query(r) - query(l-1);	
	}
} sum;
ll a[maxn];
int main() {
	io
	int n, q;
	cin >> n;
	for (int i = 0;i < n;i++) {
		cin >> a[i];
		sum.modify(i, a[i]);
	}
	bool ini = 1;
	auto check = [&] (int l, int r, ll s) { //stuck in [l, r]
		if (r < l) return;
		if (ini) s = sum.sum(l, r);
	
		if(!((l && s >= a[l-1]) || (r < n - 1 && s >= a[r+1]))) {
			//debug(l, r);
			inter.ins(1, 0, n, {l, r});				
			mincnt.modify(1, 0, n, l, r+1, 1);	
		}
	};
	tr.init(1, 0, n, a);
	mincnt.init(1, 0, n);
	{
		ll pref[maxn];
		for (int i = 0;i < n;i++) {
			pref[i] = a[i] + (i ? pref[i-1] : 0);
			lb.modify(1, 0, n, i, i+1, a[i] - (i ? pref[i-1] : 0));	
			rb.modify(1, 0, n, i, i+1, a[i] + pref[i]);
		}
		
		stack<int> stk;
		for (int i = 0;i < n;i++) {
			while (stk.size() && a[i] >= a[stk.top()]) {
				check(stk.top()+1, i-1, 0);
				stk.pop();	
			}
			if (stk.size()) check(stk.top()+1, i-1, 0);	
			else check(0, i-1, 0);
			stk.push(i);
		}
		while (stk.size()) {
			check(stk.top()+1, n-1, 0);
			stk.pop();
		}
	}
	ini = 0;
	cin >> q;
	while (q--) {
		int type;
		cin >> type;
		if (type == 1) {
			int i, y;
			cin >> i >> y;
			i--;
			ll d = y - a[i];
			tr.modify(1, 0, n, i, i+1, d); 
			lb.modify(1, 0, n, i, i+1, d);
			rb.modify(1, 0, n, i, i+1, d);
			lb.modify(1, 0, n, i+1, n, -d);
			rb.modify(1, 0, n, i, n, d);
			sum.modify(i, d);
			a[i] = y;

			vector<pii> rem;
			inter.remove(1, 0, n, i, rem);
			inter.remove(1, 0, n, i-1, rem);
			inter.remove(1, 0, n, i+1, rem);
			for (auto p:rem) {
				//debug("rem", p.ff, p.ss);
				mincnt.modify(1, 0, n, p.ff, p.ss+1, -1);
			}
			vector<int> lef, rig;
			int cur = i+1;		
			ll s = a[i];
			if (i+1 < n) {
				if (a[i+1] < s) s = a[i+1], cur = i+2;
				lef.push_back(i+1);
			}
			while (cur < n) {
				int nxt = tr.search(1, 0, n, cur, n, 0, s+1);
				if (nxt != -1) {
					rig.push_back(nxt-1);
					cur = nxt;
					s += a[nxt];
				} else {
					break;
				}
			}
			rig.push_back(n-1);	
			cur = i-1, s = a[i];	
			if (i-1 >= 0) {
				if (a[i-1] < s) s = a[i-1], cur = i-2;
				rig.insert(rig.begin(), i-1);
			}
			while (cur >= 0) {
				int nxt = tr.search(1, 0, n, 0, cur+1, 1, s+1);
				if (nxt != -1) {
					lef.push_back(nxt+1);
					cur = nxt;
					s += a[nxt];
				} else {
					break;
				}
			}
			lef.push_back(0);

			lef.resize(int(unique(lef.begin(), lef.end()) - lef.begin()));
			rig.resize(int(unique(rig.begin(), rig.end()) - rig.begin()));
			vector<ll> ls, rs;
			for (int I:lef) ls.push_back(sum.query(I-1)); 
			for (int I:rig) rs.push_back(sum.query(I));
			for (int I = (int)lef.size() - 1;I >= 0;I--) {
				for (int j = 0;j < rig.size();j++) {
					check(lef[I], rig[j], rs[j] - ls[I]);
				}
			}

		} else {
			int l, r;
			cin >> l >> r;
			l--; //[l, r)
			ll suml = -sum.query(l-1)+1, sumr = sum.query(r-1)+1;
			int il = lb.search(1, 0, n, l, r, 1, suml);
			int ir = rb.search(1, 0, n, l, r, 0, sumr)+1;
			if (il != -1) l = il;
			if (ir != -1) r = ir;
			cout << mincnt.query(1, 0, n, l, r).ss << "\n";
		}
	}
}
/*
*/

Compilation message

fish2.cpp: In member function 'void segtree::print(int, int, int)':
fish2.cpp:12:20: warning: statement has no effect [-Wunused-value]
   12 | #define debug(...) 0
      |                    ^
fish2.cpp:164:4: note: in expansion of macro 'debug'
  164 |    debug(seg[cur]);
      |    ^~~~~
fish2.cpp: In function 'int main()':
fish2.cpp:300:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  300 |     for (int j = 0;j < rig.size();j++) {
      |                    ~~^~~~~~~~~~~~

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 156 ms 273632 KB Output is correct
2 Correct 187 ms 273584 KB Output is correct
3 Correct 158 ms 273596 KB Output is correct
4 Correct 165 ms 273596 KB Output is correct
5 Incorrect 161 ms 273612 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #2
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 191 ms 273588 KB Output is correct
2 Correct 274 ms 286336 KB Output is correct
3 Correct 269 ms 286424 KB Output is correct
4 Correct 264 ms 286352 KB Output is correct
5 Correct 283 ms 286384 KB Output is correct
6 Correct 305 ms 286400 KB Output is correct
7 Correct 241 ms 286344 KB Output is correct
8 Correct 263 ms 286416 KB Output is correct
9 Correct 281 ms 286396 KB Output is correct
10 Correct 273 ms 286392 KB Output is correct
11 Correct 249 ms 286496 KB Output is correct
12 Correct 255 ms 286284 KB Output is correct
13 Correct 250 ms 286336 KB Output is correct
14 Correct 292 ms 286400 KB Output is correct
15 Correct 259 ms 286380 KB Output is correct

Subtask #3
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 156 ms 273632 KB Output is correct
2 Correct 187 ms 273584 KB Output is correct
3 Correct 158 ms 273596 KB Output is correct
4 Correct 165 ms 273596 KB Output is correct
5 Incorrect 161 ms 273612 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #4
23.0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 191 ms 273588 KB Output is correct
2 Correct 274 ms 286336 KB Output is correct
3 Correct 269 ms 286424 KB Output is correct
4 Correct 264 ms 286352 KB Output is correct
5 Correct 283 ms 286384 KB Output is correct
6 Correct 305 ms 286400 KB Output is correct
7 Correct 241 ms 286344 KB Output is correct
8 Correct 263 ms 286416 KB Output is correct
9 Correct 281 ms 286396 KB Output is correct
10 Correct 273 ms 286392 KB Output is correct
11 Correct 249 ms 286496 KB Output is correct
12 Correct 255 ms 286284 KB Output is correct
13 Correct 250 ms 286336 KB Output is correct
14 Correct 292 ms 286400 KB Output is correct
15 Correct 259 ms 286380 KB Output is correct
16 Correct 165 ms 273556 KB Output is correct
17 Correct 495 ms 286724 KB Output is correct
18 Correct 426 ms 286896 KB Output is correct
19 Correct 399 ms 286708 KB Output is correct
20 Correct 393 ms 286740 KB Output is correct
21 Correct 387 ms 286700 KB Output is correct
22 Correct 416 ms 286748 KB Output is correct
23 Correct 473 ms 286764 KB Output is correct
24 Correct 426 ms 286692 KB Output is correct
25 Correct 406 ms 286788 KB Output is correct
26 Correct 388 ms 286864 KB Output is correct
27 Correct 477 ms 286896 KB Output is correct
28 Correct 457 ms 286964 KB Output is correct
29 Correct 443 ms 286864 KB Output is correct
30 Correct 340 ms 286624 KB Output is correct
31 Correct 340 ms 286580 KB Output is correct
32 Correct 364 ms 286864 KB Output is correct
33 Correct 411 ms 286828 KB Output is correct
34 Correct 383 ms 286800 KB Output is correct
35 Correct 428 ms 286636 KB Output is correct
36 Correct 511 ms 286864 KB Output is correct
37 Correct 432 ms 286644 KB Output is correct
38 Correct 419 ms 286728 KB Output is correct
39 Correct 487 ms 286844 KB Output is correct
40 Correct 477 ms 286976 KB Output is correct

Subtask #5
0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 191 ms 273588 KB Output is correct
2 Correct 274 ms 286336 KB Output is correct
3 Correct 269 ms 286424 KB Output is correct
4 Correct 264 ms 286352 KB Output is correct
5 Correct 283 ms 286384 KB Output is correct
6 Correct 305 ms 286400 KB Output is correct
7 Correct 241 ms 286344 KB Output is correct
8 Correct 263 ms 286416 KB Output is correct
9 Correct 281 ms 286396 KB Output is correct
10 Correct 273 ms 286392 KB Output is correct
11 Correct 249 ms 286496 KB Output is correct
12 Correct 255 ms 286284 KB Output is correct
13 Correct 250 ms 286336 KB Output is correct
14 Correct 292 ms 286400 KB Output is correct
15 Correct 259 ms 286380 KB Output is correct
16 Correct 191 ms 273524 KB Output is correct
17 Incorrect 1898 ms 288496 KB Output isn't correct
18 Halted 0 ms 0 KB -

Subtask #6
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 156 ms 273632 KB Output is correct
2 Correct 187 ms 273584 KB Output is correct
3 Correct 158 ms 273596 KB Output is correct
4 Correct 165 ms 273596 KB Output is correct
5 Incorrect 161 ms 273612 KB Output isn't correct
6 Halted 0 ms 0 KB -