oj.uz

Submission #617278

# Submission time Handle Problem Language Result Execution time Memory
617278 2022-08-01T10:23:43 Z cheissmart Fish 2 (JOI22_fish2) C++14
60 / 100
 4000 ms 235356 KB 
// 花啊啊啊啊啊啊啊啊啊啊啊啊
#include <iostream>
#pragma GCC optimize("Ofast")
#define IO_OP std::ios::sync_with_stdio(0); std::cin.tie(0);
#define F first
#define S second
#define PB push_back
#define EB emplace_back
#define MP make_pair
#define SZ(v) int((v).size())
#define ALL(v) (v).begin(), (v).end()

using namespace std;

typedef long long ll;
typedef pair<int, int> pi;

const int INF = 1e9 + 7, N = 1e5 + 2;
const ll oo = 1e16;

ll a[N];
int n;

namespace cover {
	int t[N * 2];
	char tag[N * 2];
	int sum(int v, int h) { return tag[v] ? h : t[v]; }
	void pull(int p) {
		int h = 1;
	    while(p > 1) {
	        t[p >> 1] = sum(p, h) + sum(p ^ 1, h);
	        p >>= 1;
	        h <<= 1;
	    }
	}
	void add(int l, int r, int x) {
		if(l == 1 && r == n + 1) return;
		l--, r--;
		int tl = l, tr = r;
	    for(l += n, r += n; l < r; l >>= 1, r >>= 1) {
	    	if(l & 1) tag[l++] += x;
	    	if(r & 1) tag[--r] += x;
	    }
	    pull(tl + n), pull(tr - 1 + n);
	}
	int qry(int l, int r) {
		l--, r--; 
	    int res = 0, h = 1;
	    for(l += n, r += n; l < r; l >>= 1, r >>= 1, h <<= 1) {
	        if(l & 1) res += sum(l++, h);
	        if(r & 1) res += sum(--r, h);
	    }
	    return res;
	}
}

namespace seg {
	template<class A, class B> struct DS {
		pair<A, B> a[29];
		int sz;
		DS() { sz = 0; }
		void clear() { sz = 0; }
		void EB(A& x, B& y) { a[sz++] = {x, y}; }
		void PB(pair<A, B>& p) { a[sz++] = p; }
		pair<A, B>& operator[](int i) { return a[i]; }
		void resize(int s) { sz = s; }
	};

	struct node {
		DS<int, ll> bad_pref, bad_suff;
		DS<int, int> bad_seg;
		ll sum;
	} t[N * 2];

	int id(int tl, int tr) {
		tl--, tr -= 2;
	    return (tl + tr) | (tl != tr);
	}

	void pull(int v, int tl, int tr, int lc, int rc, int posl = INF, int posr = 0) {
		for(int i = 0; i < t[lc].bad_pref.sz; i++)
			t[v].bad_pref.PB(t[lc].bad_pref[i]);
		for(int i = 0; i < t[rc].bad_suff.sz; i++)
			t[v].bad_suff.PB(t[rc].bad_suff[i]);

		for(int i = 0; i < t[rc].bad_pref.sz; i++) {
			ll sum1 = t[rc].bad_pref[i].S + t[lc].sum;
			int pos1 = t[rc].bad_pref[i].F;
			if(sum1 + a[tl - 1] < a[pos1 + 1])
				t[v].bad_pref.EB(pos1, sum1);
		}
		for(int i = 0; i < t[lc].bad_suff.sz; i++) {
			ll sum1 = t[lc].bad_suff[i].S + t[rc].sum;
			int pos1 = t[lc].bad_suff[i].F;
			if(sum1 + a[tr] < a[pos1 - 1])
				t[v].bad_suff.EB(pos1, sum1);
		}

		int szi = t[lc].bad_suff.sz;
		int szj = t[rc].bad_pref.sz;
		int i = 0, j = 0;
		while(i < szi && t[lc].bad_suff[i].F > posl)
			i++;
		while(j < szj && t[rc].bad_pref[j].F < posr)
			j++;
		while(i < szi && j < szj) {
			auto& he = t[lc].bad_suff[i], be = t[rc].bad_pref[j];
			if(he.S + be.S < min(a[he.F - 1], a[be.F + 1])) {
				t[v].bad_seg.EB(he.F, be.F);
				cover::add(he.F, be.F + 1, 1);
			}
			if(a[he.F - 1] < a[be.F + 1])
				i++;
			else
				j++;
		}
		t[v].sum = t[lc].sum + t[rc].sum;
	}
	void build(int tl = 1, int tr = n + 1) {
		int v = id(tl, tr);
		if(tr - tl == 1) {
			t[v].sum = a[tl];
			if(a[tl] + a[tl - 1] < a[tl + 1])
				t[v].bad_pref.EB(tl, a[tl]);
			if(a[tl] + a[tl + 1] < a[tl - 1])
				t[v].bad_suff.EB(tl, a[tl]);
			if(a[tl] < a[tl + 1] && a[tl] < a[tl - 1]) {
				t[v].bad_seg.EB(tl, tl);
				cover::add(tl, tl + 1, 1);
			}
		} else {
			int tm = (tl + tr + 1) / 2;
			build(tl, tm);
			build(tm, tr);
			pull(v, tl, tr, id(tl, tm), id(tm, tr));
		}
	}
	void upd(int pos, int tl = 1, int tr = n + 1) {
		int v = id(tl, tr);
		int j = 0;
		for(int i = 0; i < t[v].bad_seg.sz; i++) {
			auto [l, r] = t[v].bad_seg[i];
			if(r < pos - 1 || l > pos + 1) {
				t[v].bad_seg[j++] = t[v].bad_seg[i];
			} else {
				cover::add(l, r + 1, -1);
			}
		}
		t[v].bad_seg.resize(j);

		t[v].bad_pref.clear(), t[v].bad_suff.clear();
		if(tr - tl == 1) {
			t[v].sum = a[tl];
			if(a[tl] + a[tl - 1] < a[tl + 1])
				t[v].bad_pref.EB(tl, a[tl]);
			if(a[tl] + a[tl + 1] < a[tl - 1])
				t[v].bad_suff.EB(tl, a[tl]);
			if(a[tl] < a[tl + 1] && a[tl] < a[tl - 1]) {
				t[v].bad_seg.EB(tl, tl);
				cover::add(tl, tl + 1, 1);
			}
		} else {
			int tm = (tl + tr + 1) / 2;
			if(pos - 1 < tm)
				upd(pos, tl, tm);
			if(pos + 1 >= tm)
				upd(pos, tm, tr);
			pull(v, tl, tr, id(tl, tm), id(tm, tr), pos + 1, pos - 1);
		}
	}
}

void upd(int pos, ll val) {
	a[pos] = val;
	seg::upd(pos);
}

#define gc getchar_unlocked
inline int readInt () {
	int c = gc();
	while(!isdigit(c)) c = gc();
	int res = c - '0';
	while(isdigit(c = gc())) res = res * 10 + c - '0';
	return res;
}

#define pc putchar_unlocked
inline void writeInt (int n) {
    int N = n, rev, count = 0;
    rev = N;
    if (N == 0) { pc('0'); return ;}
    while ((rev % 10) == 0) { count++; rev /= 10;}
    rev = 0;
    while (N != 0) { rev = (rev<<3) + (rev<<1) + N % 10; N /= 10;}
    while (rev != 0) { pc(rev % 10 + '0'); rev /= 10;}
    while (count--) pc('0');
}

signed main()
{
	IO_OP;

	n = readInt();
	a[0] = a[n + 1] = oo;
	for(int i = 1; i <= n; i++)
		a[i] = readInt();

	seg::build();

	int q = readInt();
	while(q--) {
		int op = readInt();
		if(op == 1) {
			int x = readInt(), y = readInt();
			upd(x, y);
		} else {
			int l = readInt(), r = readInt();
			ll tl = a[l - 1], tr = a[r + 1];

			if(l - 1 >= 1) upd(l - 1, 1e15);
			if(r + 1 <= n) upd(r + 1, 1e15);
			if(l != 1 || r != n)
				cover::add(l, r + 1, -1);

			writeInt(r - l + 1 - cover::qry(l, r + 1));
			pc('\n');

			if(l != 1 || r != n)
				cover::add(l, r + 1, 1);

			if(l - 1 >= 1) upd(l - 1, tl);
			if(r + 1 <= n) upd(r + 1, tr);
		}
	}

}

Compilation message

fish2.cpp: In function 'void seg::upd(int, int, int)':
fish2.cpp:142:9: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  142 |    auto [l, r] = t[v].bad_seg[i];
      |         ^

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 102 ms 233548 KB Output is correct
2 Correct 118 ms 233484 KB Output is correct
3 Correct 110 ms 233572 KB Output is correct
4 Correct 101 ms 233480 KB Output is correct
5 Correct 113 ms 233584 KB Output is correct
6 Correct 106 ms 233556 KB Output is correct
7 Correct 130 ms 233548 KB Output is correct
8 Correct 110 ms 233508 KB Output is correct
9 Correct 104 ms 233552 KB Output is correct
10 Correct 112 ms 233548 KB Output is correct
11 Correct 112 ms 233592 KB Output is correct
12 Correct 110 ms 233556 KB Output is correct
13 Correct 104 ms 233572 KB Output is correct
14 Correct 114 ms 233588 KB Output is correct
15 Correct 104 ms 233580 KB Output is correct
16 Correct 103 ms 233676 KB Output is correct
17 Correct 102 ms 233528 KB Output is correct
18 Correct 109 ms 233512 KB Output is correct
19 Correct 101 ms 233480 KB Output is correct
20 Correct 102 ms 233528 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 108 ms 233620 KB Output is correct
2 Correct 128 ms 234928 KB Output is correct
3 Correct 130 ms 234860 KB Output is correct
4 Correct 133 ms 234844 KB Output is correct
5 Correct 134 ms 234844 KB Output is correct
6 Correct 123 ms 234916 KB Output is correct
7 Correct 122 ms 234896 KB Output is correct
8 Correct 123 ms 234872 KB Output is correct
9 Correct 121 ms 234848 KB Output is correct
10 Correct 132 ms 234856 KB Output is correct
11 Correct 124 ms 234948 KB Output is correct
12 Correct 118 ms 234868 KB Output is correct
13 Correct 119 ms 234860 KB Output is correct
14 Correct 125 ms 234948 KB Output is correct
15 Correct 126 ms 234860 KB Output is correct

Subtask #3
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 102 ms 233548 KB Output is correct
2 Correct 118 ms 233484 KB Output is correct
3 Correct 110 ms 233572 KB Output is correct
4 Correct 101 ms 233480 KB Output is correct
5 Correct 113 ms 233584 KB Output is correct
6 Correct 106 ms 233556 KB Output is correct
7 Correct 130 ms 233548 KB Output is correct
8 Correct 110 ms 233508 KB Output is correct
9 Correct 104 ms 233552 KB Output is correct
10 Correct 112 ms 233548 KB Output is correct
11 Correct 112 ms 233592 KB Output is correct
12 Correct 110 ms 233556 KB Output is correct
13 Correct 104 ms 233572 KB Output is correct
14 Correct 114 ms 233588 KB Output is correct
15 Correct 104 ms 233580 KB Output is correct
16 Correct 103 ms 233676 KB Output is correct
17 Correct 102 ms 233528 KB Output is correct
18 Correct 109 ms 233512 KB Output is correct
19 Correct 101 ms 233480 KB Output is correct
20 Correct 102 ms 233528 KB Output is correct
21 Correct 108 ms 233620 KB Output is correct
22 Correct 128 ms 234928 KB Output is correct
23 Correct 130 ms 234860 KB Output is correct
24 Correct 133 ms 234844 KB Output is correct
25 Correct 134 ms 234844 KB Output is correct
26 Correct 123 ms 234916 KB Output is correct
27 Correct 122 ms 234896 KB Output is correct
28 Correct 123 ms 234872 KB Output is correct
29 Correct 121 ms 234848 KB Output is correct
30 Correct 132 ms 234856 KB Output is correct
31 Correct 124 ms 234948 KB Output is correct
32 Correct 118 ms 234868 KB Output is correct
33 Correct 119 ms 234860 KB Output is correct
34 Correct 125 ms 234948 KB Output is correct
35 Correct 126 ms 234860 KB Output is correct
36 Correct 150 ms 234956 KB Output is correct
37 Correct 166 ms 234964 KB Output is correct
38 Correct 187 ms 235032 KB Output is correct
39 Correct 140 ms 234908 KB Output is correct
40 Correct 177 ms 234876 KB Output is correct
41 Correct 137 ms 234868 KB Output is correct
42 Correct 134 ms 234844 KB Output is correct
43 Correct 138 ms 234860 KB Output is correct
44 Correct 147 ms 234868 KB Output is correct
45 Correct 159 ms 234912 KB Output is correct
46 Correct 160 ms 234836 KB Output is correct
47 Correct 151 ms 234888 KB Output is correct
48 Correct 133 ms 234952 KB Output is correct
49 Correct 140 ms 234848 KB Output is correct
50 Correct 138 ms 234952 KB Output is correct
51 Correct 139 ms 234944 KB Output is correct
52 Correct 136 ms 234888 KB Output is correct

Subtask #4
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 108 ms 233620 KB Output is correct
2 Correct 128 ms 234928 KB Output is correct
3 Correct 130 ms 234860 KB Output is correct
4 Correct 133 ms 234844 KB Output is correct
5 Correct 134 ms 234844 KB Output is correct
6 Correct 123 ms 234916 KB Output is correct
7 Correct 122 ms 234896 KB Output is correct
8 Correct 123 ms 234872 KB Output is correct
9 Correct 121 ms 234848 KB Output is correct
10 Correct 132 ms 234856 KB Output is correct
11 Correct 124 ms 234948 KB Output is correct
12 Correct 118 ms 234868 KB Output is correct
13 Correct 119 ms 234860 KB Output is correct
14 Correct 125 ms 234948 KB Output is correct
15 Correct 126 ms 234860 KB Output is correct
16 Correct 102 ms 233552 KB Output is correct
17 Execution timed out 4029 ms 235356 KB Time limit exceeded
18 Halted 0 ms 0 KB -

Subtask #5
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 108 ms 233620 KB Output is correct
2 Correct 128 ms 234928 KB Output is correct
3 Correct 130 ms 234860 KB Output is correct
4 Correct 133 ms 234844 KB Output is correct
5 Correct 134 ms 234844 KB Output is correct
6 Correct 123 ms 234916 KB Output is correct
7 Correct 122 ms 234896 KB Output is correct
8 Correct 123 ms 234872 KB Output is correct
9 Correct 121 ms 234848 KB Output is correct
10 Correct 132 ms 234856 KB Output is correct
11 Correct 124 ms 234948 KB Output is correct
12 Correct 118 ms 234868 KB Output is correct
13 Correct 119 ms 234860 KB Output is correct
14 Correct 125 ms 234948 KB Output is correct
15 Correct 126 ms 234860 KB Output is correct
16 Correct 101 ms 233492 KB Output is correct
17 Correct 593 ms 235000 KB Output is correct
18 Correct 562 ms 234928 KB Output is correct
19 Correct 490 ms 235144 KB Output is correct
20 Correct 438 ms 235124 KB Output is correct
21 Correct 597 ms 234964 KB Output is correct
22 Correct 538 ms 235228 KB Output is correct
23 Correct 561 ms 235012 KB Output is correct
24 Correct 546 ms 234984 KB Output is correct
25 Correct 522 ms 235124 KB Output is correct
26 Correct 252 ms 235168 KB Output is correct
27 Correct 325 ms 235180 KB Output is correct
28 Correct 360 ms 235084 KB Output is correct
29 Correct 282 ms 235112 KB Output is correct
30 Correct 306 ms 234940 KB Output is correct
31 Correct 416 ms 234984 KB Output is correct
32 Correct 496 ms 234988 KB Output is correct
33 Correct 327 ms 235024 KB Output is correct
34 Correct 495 ms 235052 KB Output is correct
35 Correct 310 ms 235088 KB Output is correct
36 Correct 468 ms 235068 KB Output is correct
37 Correct 404 ms 235260 KB Output is correct
38 Correct 301 ms 235188 KB Output is correct
39 Correct 303 ms 235160 KB Output is correct
40 Correct 213 ms 235316 KB Output is correct

Subtask #6
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 102 ms 233548 KB Output is correct
2 Correct 118 ms 233484 KB Output is correct
3 Correct 110 ms 233572 KB Output is correct
4 Correct 101 ms 233480 KB Output is correct
5 Correct 113 ms 233584 KB Output is correct
6 Correct 106 ms 233556 KB Output is correct
7 Correct 130 ms 233548 KB Output is correct
8 Correct 110 ms 233508 KB Output is correct
9 Correct 104 ms 233552 KB Output is correct
10 Correct 112 ms 233548 KB Output is correct
11 Correct 112 ms 233592 KB Output is correct
12 Correct 110 ms 233556 KB Output is correct
13 Correct 104 ms 233572 KB Output is correct
14 Correct 114 ms 233588 KB Output is correct
15 Correct 104 ms 233580 KB Output is correct
16 Correct 103 ms 233676 KB Output is correct
17 Correct 102 ms 233528 KB Output is correct
18 Correct 109 ms 233512 KB Output is correct
19 Correct 101 ms 233480 KB Output is correct
20 Correct 102 ms 233528 KB Output is correct
21 Correct 108 ms 233620 KB Output is correct
22 Correct 128 ms 234928 KB Output is correct
23 Correct 130 ms 234860 KB Output is correct
24 Correct 133 ms 234844 KB Output is correct
25 Correct 134 ms 234844 KB Output is correct
26 Correct 123 ms 234916 KB Output is correct
27 Correct 122 ms 234896 KB Output is correct
28 Correct 123 ms 234872 KB Output is correct
29 Correct 121 ms 234848 KB Output is correct
30 Correct 132 ms 234856 KB Output is correct
31 Correct 124 ms 234948 KB Output is correct
32 Correct 118 ms 234868 KB Output is correct
33 Correct 119 ms 234860 KB Output is correct
34 Correct 125 ms 234948 KB Output is correct
35 Correct 126 ms 234860 KB Output is correct
36 Correct 150 ms 234956 KB Output is correct
37 Correct 166 ms 234964 KB Output is correct
38 Correct 187 ms 235032 KB Output is correct
39 Correct 140 ms 234908 KB Output is correct
40 Correct 177 ms 234876 KB Output is correct
41 Correct 137 ms 234868 KB Output is correct
42 Correct 134 ms 234844 KB Output is correct
43 Correct 138 ms 234860 KB Output is correct
44 Correct 147 ms 234868 KB Output is correct
45 Correct 159 ms 234912 KB Output is correct
46 Correct 160 ms 234836 KB Output is correct
47 Correct 151 ms 234888 KB Output is correct
48 Correct 133 ms 234952 KB Output is correct
49 Correct 140 ms 234848 KB Output is correct
50 Correct 138 ms 234952 KB Output is correct
51 Correct 139 ms 234944 KB Output is correct
52 Correct 136 ms 234888 KB Output is correct
53 Correct 102 ms 233552 KB Output is correct
54 Execution timed out 4029 ms 235356 KB Time limit exceeded
55 Halted 0 ms 0 KB -