oj.uz

Submission #936409

# Submission time Handle Problem Language Result Execution time Memory
936409 2024-03-01T18:53:45 Z EJIC_B_KEDAX Comparing Plants (IOI20_plants) C++17
43 / 100
 2358 ms 239792 KB 
#include <bits/stdc++.h>
#include "plants.h"

#define x first
#define y second

using ll = long long;
 
using namespace std;
 
const int LG = 19, N = 1 << LG;
int st1[2 * N], st2[2 * N], lz1[2 * N], lz2[2 * N], timer = 1, fndl[2 * N], fndl2[2 * N], used3[N], level[N], kk, nn;
pair<int, int> fnd[2 * N], binupl[LG][N], binupr[LG][N], fnd2[2 * N];
vector<pair<int, int>> mst[2 * N];



void push(int i, int st[], int lz[]) {
	if (lz[i] != -1) {
		st[2 * i + 1] = lz[i];
		st[2 * i + 2] = lz[i];
		lz[2 * i + 1] = lz[i];
		lz[2 * i + 2] = lz[i];
		lz[i] = -1;
	}
}

void set_seg(int l, int r, int x, int st[], int lz[], int l1 = 0, int r1 = N - 1, int i = 0) {
	if (l1 >= l && r1 <= r) {
		st[i] = x;
		lz[i] = x;
		return;
	}
	if (l1 > r || r1 < l) {
		return;
	}
	push(i, st, lz);
	set_seg(l, r, x, st, lz, l1, (l1 + r1) / 2, 2 * i + 1);
	set_seg(l, r, x, st, lz, (l1 + r1) / 2 + 1, r1, 2 * i + 2);
	st[i] = min(st[2 * i + 1], st[2 * i + 2]);
}

int get(int ind, int st[], int lz[], int l1 = 0, int r1 = N - 1, int i = 0) {
	if (l1 == ind && r1 == ind) {
		return st[i];
	}
	if (l1 > ind || r1 < ind) {
		return INT32_MAX;
	}
	push(i, st, lz);
	return min(get(ind, st, lz, l1, (l1 + r1) / 2, 2 * i + 1), get(ind, st, lz, (l1 + r1) / 2 + 1, r1, 2 * i + 2));
}

void push(int i) {
	fnd[2 * i + 1].x += fndl[i];
	fnd[2 * i + 2].x += fndl[i];
	fndl[2 * i + 1] += fndl[i];
	fndl[2 * i + 2] += fndl[i];
	fndl[i] = 0;
}

void push1(int i) {
	fnd2[2 * i + 1].x += fndl2[i];
	fnd2[2 * i + 2].x += fndl2[i];
	fndl2[2 * i + 1] += fndl2[i];
	fndl2[2 * i + 2] += fndl2[i];
	fndl2[i] = 0;
}

void add_seg(int l, int r, int x, int l1 = 0, int r1 = N - 1, int i = 0) {
	if (l1 >= l && r1 <= r) {
		fnd[i].x += x;
		fndl[i] += x;
		return;
	}
	if (l1 > r || r1 < l) {
		return;
	}
	push(i);
	add_seg(l, r, x, l1, (l1 + r1) / 2, 2 * i + 1);
	add_seg(l, r, x, (l1 + r1) / 2 + 1, r1, 2 * i + 2);
	fnd[i] = min(fnd[2 * i + 1], fnd[2 * i + 2]);
}

pair<int, int> get_min(int l, int r, int l1 = 0, int r1 = N - 1, int i = 0) {
	if (l1 >= l && r1 <= r) {
		return fnd[i];
	}
	if (l1 > r || r1 < l) {
		return {INT32_MAX, -1};
	}
	push(i);
	return min(get_min(l, r, l1, (l1 + r1) / 2, 2 * i + 1), get_min(l, r, (l1 + r1) / 2 + 1, r1, 2 * i + 2));
}

void add_seg1(int l, int r, int x, int l1 = 0, int r1 = N - 1, int i = 0) {
	if (l1 >= l && r1 <= r) {
		fnd2[i].x += x;
		fndl2[i] += x;
		return;
	}
	if (l1 > r || r1 < l) {
		return;
	}
	push1(i);
	add_seg1(l, r, x, l1, (l1 + r1) / 2, 2 * i + 1);
	add_seg1(l, r, x, (l1 + r1) / 2 + 1, r1, 2 * i + 2);
	fnd2[i] = min(fnd2[2 * i + 1], fnd2[2 * i + 2]);
}

pair<int, int> get_min1(int l, int r, int l1 = 0, int r1 = N - 1, int i = 0) {
	if (l1 >= l && r1 <= r) {
		return fnd2[i];
	}
	if (l1 > r || r1 < l) {
		return {INT32_MAX, -1};
	}
	push1(i);
	return min(get_min1(l, r, l1, (l1 + r1) / 2, 2 * i + 1), get_min1(l, r, (l1 + r1) / 2 + 1, r1, 2 * i + 2));
}

pair<int, int> find_max(int i, int v) {
	int l = -1, r = mst[i].size();
	while (r - l > 1) {
		int m = (r + l) / 2;
		if (mst[i][m].x >= v) {
			r = m;
		} else {
			l = m;
		}
	}
	return l == -1 ? make_pair(-1, N) : mst[i][l];
}

pair<int, int> get_max(int l, int r, int v) {
	l += N - 1;
	r += N - 1;
	pair<int, int> res = {-1, -1};
	while (l <= r) {
		if (~l & 1) {
			res = max(res, find_max(l++, v));
		}
		if (r & 1) {
			res = max(res, find_max(r--, v));
		}
		l = (l - 1) / 2;
		r = (r - 1) / 2;
	}
	return res;
}

void mrg(int to, int a, int b) {
	mst[to].resize(mst[a].size() + mst[b].size());
	std::merge(mst[a].begin(), mst[a].end(), mst[b].begin(), mst[b].end(), mst[to].begin());
}

void init(int k, vector<int> r) {
	kk = k;
    int n = r.size();
    nn = n;
    int ok = 0;
    for (int i = 0; i < 2 * N; i++) {
    	st1[i] = -1;
    	st2[i] = -1;
    	lz1[i] = -1;
    	lz2[i] = -1;
    }
    for (int i = 0; i < N; i++) {
    	fnd[i + N - 1].y = i;
    	fnd2[i + N - 1].y = i;
    	level[i] = n;
    }
    for (int i = 0; i < n; i++) {
    	add_seg(i, i, r[i]);
    	add_seg1(i, i, r[i]);
		if (r[i] == 0) {
			used3[i] = 1;
			if (i + k > n) {
				add_seg(i + 1, n - 1, 1);
				add_seg(0, i + k - n - 1, 1);
			} else {
				add_seg(i + 1, i + k - 1, 1);
			}
		}
    }
    while (ok < n) {
    	auto [value, i] = get_min(0, n - 1);
    	// cout << i << '\n';
    	// for (int i = 0; i < n; i++) {
    	// 	cout << get_min(i, i).x << ' ';
    	// }
    	// cout << '\n';
    	if (value) {
    		// cout << value << ' ' << ok << '\n';
    		exit(1);
    	}
    	int tmp1 = get(i, st1, lz1), tmp2 = get(i, st2, lz2);
    	if (tmp1 != -1) {
    		level[i] = min(level[i], level[tmp1] - 1);
    	}
    	if (tmp2 != -1) {
    		level[i] = min(level[i], level[tmp2] - 1);
    	}
    	vector<int> z;
        if (i + k - 1 < n) {
    		set_seg(i + 1, i + k - 1, i, st2, lz2);
    		add_seg(i + 1, i + k - 1, -1);
    	} else {
    		set_seg(i + 1, n - 1, i, st2, lz2);
    		set_seg(0, i + k - 1 - n, i, st2, lz2);
    		add_seg(i + 1, n - 1, -1);
    		add_seg(0, i + k - 1 - n, -1);
    	}
    	if (i >= k - 1) {
    		add_seg(i - k + 1, i - 1, -1);
    		add_seg1(i - k + 1, i - 1, -1);
    		int left = i - k + 1;
    		while (left <= i - 1 && !get_min1(left, i - 1).x) {
    			z.push_back(get_min1(left, i - 1).y);
    			assert(left <= z.back());
    			left = z.back() + 1;
    		}
    		set_seg(i - k + 1, i - 1, i, st1, lz1);
    	} else {
    		add_seg(0, i - 1, -1);
    		add_seg1(0, i - 1, -1);
    		set_seg(0, i - 1, i, st1, lz1);
    		add_seg(n + 1 - k + i, n - 1, -1);
    		add_seg1(n + 1 - k + i, n - 1, -1);
    		set_seg(n + 1 - k + i, n - 1, i, st1, lz1);
    		int left = 0;
    		while (left <= i - 1 && !get_min1(left, i - 1).x) {
    			z.push_back(get_min1(left, i - 1).y);
    			assert(left <= z.back());
    			left = z.back() + 1;
    		}
    		left = n + 1 - k + i;
    		while (left <= n - 1 && !get_min1(left, n - 1).x) {
    			z.push_back(get_min1(left, n - 1).y);
    			assert(left <= z.back());
    			left = z.back() + 1;
    		}
    	}
    	for (int j : z) {
    		if (!used3[j]) {
				if (j + k > n) {
					add_seg(j + 1, n - 1, 1);
					add_seg(0, j + k - n - 1, 1);
				} else {
					add_seg(j + 1, j + k - 1, 1);
				}
				used3[j] = 1;
			}
		}
        add_seg(i, i, INT32_MAX / 2);
        add_seg1(i, i, INT32_MAX / 2);
    	ok++;
    }
    // for (int i = 0; i < n; i++) {
    // 	cout << level[i] << ' ';
    // }
    // cout << '\n';
    // for (int i = 0; i < n; i++) {
    // 	mst[N - 1 + i].emplace_back(level[i], i);
    // }
    // for (int i = N - 2; i >= 0; i--) {
    // 	mrg(i, 2 * i + 1, 2 * i + 2);
    // }
    set<pair<int, int>> st1;
    set<pair<int, int>> st2;
    for (int i = n - k + 1; i < n; i++) {
    	st1.emplace(-level[i], i);
    }
    for (int i = 1; i < k; i++) {
    	st2.emplace(-level[i], i);
    }
    for (int i = 0; i < n; i++) {
    	auto lb1 = st1.lower_bound({-level[i], N});
    	if (lb1 == st1.end()) {
    		binupl[0][i].x = i;
    	} else {
    		binupl[0][i].x = (*lb1).y;
    	}
    	st1.erase({-level[(i - k + 1 + n) % n], (i - k + 1 + n) % n});
    	st1.emplace(-level[i], i);
    	// if (i >= k - 1) {
    	// 	binupl[0][i].x = get_max(i - k + 1, i - 1, level[i]).y;
    	// } else {
    	// 	binupl[0][i].x = max(get_max(0, i - 1, level[i]), get_max(n + i - k + 1, n - 1, level[i])).y;
    	// }
    	// if (binupl[0][i].x == N) {
    	// 	binupl[0][i].x = i;
    	// }
    	binupl[0][i].y = i - binupl[0][i].x;
    	if (binupl[0][i].y < 0) {
    		binupl[0][i].y += n;
    	}
    	auto lb2 = st2.lower_bound({-level[i], N});
    	if (lb2 == st2.end()) {
    		binupr[0][i].x = i;
    	} else {
    		binupr[0][i].x = (*lb2).y;
    	}
    	st2.erase({-level[i + 1], i + 1});
    	st2.emplace(-level[(i + k) % n], (i + k) % n);
    	// if (i + k - 1 < n) {
    	// 	binupr[0][i].x = get_max(i + 1, i + k - 1, level[i]).y;
    	// } else {
    	// 	binupr[0][i].x = max(get_max(i + 1, n - 1, level[i]), get_max(0, i + k - 1 - n, level[i])).y;
    	// }
    	// if (binupr[0][i].x == N) {
    	// 	binupr[0][i].x = i;
    	// }
    	binupr[0][i].y = binupr[0][i].x - i;
    	if (binupr[0][i].y < 0) {
    		binupr[0][i].y += n;
    	}
    }
    for (int l = 1; l < LG; l++) {
    	for (int i = 0; i < n; i++) {
    		binupl[l][i].x = binupl[l - 1][binupl[l - 1][i].x].x;
    		binupr[l][i].x = binupr[l - 1][binupr[l - 1][i].x].x;
    		binupl[l][i].y = binupl[l - 1][binupl[l - 1][i].x].y + binupl[l - 1][i].y;
    		binupr[l][i].y = binupr[l - 1][binupr[l - 1][i].x].y + binupr[l - 1][i].y;
    	}
    }
}

bool try_compare(int x, int y) {
	int dist = x - y, nw = x;
	if (dist < 0) {
		dist += nn;
	}
	dist -= kk - 1;
	if (level[nw] > level[y] && dist <= 0) {
		// cout << "! " << nw << '\n';
		return true;
	}
	for (int i = LG - 1; i >= 0; i--) {
		if (binupl[i][nw].y < dist) {
			dist -= binupl[i][nw].y;
			nw = binupl[i][nw].x;
		}
	}
	dist -= binupl[0][nw].y;
	nw = binupl[0][nw].x;
	if (level[nw] > level[y] && dist <= 0) {
		// cout << "!! " << nw << '\n';
		return true;
	}
	dist = y - x, nw = x;
	if (dist < 0) {
		dist += nn;
	}
	dist -= kk - 1;
	if (level[nw] > level[y] && dist <= 0) {
		// cout << "!!! " << nw << '\n';
		return true;
	}
	for (int i = LG - 1; i >= 0; i--) {
		if (binupr[i][nw].y < dist) {
			dist -= binupr[i][nw].y;
			nw = binupr[i][nw].x;
		}
	}
	dist -= binupr[0][nw].y;
	nw = binupr[0][nw].x;
	if (level[nw] > level[y] && dist <= 0) {
		// cout << "!!!! " << nw << '\n';
		return true;
	}
	return false;
}
 
int compare_plants(int x, int y) {
	if (try_compare(x, y) && level[x] > level[y]) {
		return 1;
	}
	if (try_compare(y, x) && level[y] > level[x]) {
		return -1;
	}
	return 0;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 36 ms 125624 KB Output is correct
2 Correct 20 ms 125532 KB Output is correct
3 Correct 19 ms 125532 KB Output is correct
4 Correct 22 ms 127772 KB Output is correct
5 Correct 19 ms 123484 KB Output is correct
6 Correct 155 ms 129108 KB Output is correct
7 Correct 303 ms 131200 KB Output is correct
8 Correct 1481 ms 170288 KB Output is correct
9 Correct 1510 ms 193836 KB Output is correct
10 Correct 1442 ms 191528 KB Output is correct
11 Correct 1415 ms 222172 KB Output is correct
12 Correct 1381 ms 222304 KB Output is correct
13 Correct 1375 ms 226768 KB Output is correct
14 Correct 1364 ms 226640 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 143960 KB Output is correct
2 Correct 20 ms 143964 KB Output is correct
3 Correct 20 ms 144128 KB Output is correct
4 Correct 20 ms 143960 KB Output is correct
5 Correct 20 ms 144100 KB Output is correct
6 Correct 33 ms 144144 KB Output is correct
7 Correct 190 ms 147152 KB Output is correct
8 Correct 24 ms 143964 KB Output is correct
9 Correct 30 ms 144220 KB Output is correct
10 Correct 196 ms 147156 KB Output is correct
11 Correct 108 ms 147028 KB Output is correct
12 Correct 196 ms 147264 KB Output is correct
13 Correct 172 ms 147400 KB Output is correct

Subtask #3
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 143960 KB Output is correct
2 Correct 20 ms 143964 KB Output is correct
3 Correct 20 ms 144128 KB Output is correct
4 Correct 20 ms 143960 KB Output is correct
5 Correct 20 ms 144100 KB Output is correct
6 Correct 33 ms 144144 KB Output is correct
7 Correct 190 ms 147152 KB Output is correct
8 Correct 24 ms 143964 KB Output is correct
9 Correct 30 ms 144220 KB Output is correct
10 Correct 196 ms 147156 KB Output is correct
11 Correct 108 ms 147028 KB Output is correct
12 Correct 196 ms 147264 KB Output is correct
13 Correct 172 ms 147400 KB Output is correct
14 Correct 362 ms 147860 KB Output is correct
15 Correct 2358 ms 235648 KB Output is correct
16 Correct 323 ms 148028 KB Output is correct
17 Correct 2303 ms 236056 KB Output is correct
18 Correct 1267 ms 231600 KB Output is correct
19 Correct 1723 ms 233520 KB Output is correct
20 Correct 2207 ms 239792 KB Output is correct

Subtask #4
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 143964 KB Output is correct
2 Correct 21 ms 144032 KB Output is correct
3 Correct 141 ms 146896 KB Output is correct
4 Correct 1430 ms 224180 KB Output is correct
5 Correct 1772 ms 224052 KB Output is correct
6 Correct 1747 ms 226132 KB Output is correct
7 Correct 2036 ms 227120 KB Output is correct
8 Incorrect 2137 ms 235052 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #5
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 143960 KB Output is correct
2 Correct 21 ms 144216 KB Output is correct
3 Correct 21 ms 143960 KB Output is correct
4 Correct 21 ms 143960 KB Output is correct
5 Correct 20 ms 143964 KB Output is correct
6 Correct 31 ms 144196 KB Output is correct
7 Correct 73 ms 144724 KB Output is correct
8 Correct 59 ms 144564 KB Output is correct
9 Correct 70 ms 144652 KB Output is correct
10 Correct 55 ms 144664 KB Output is correct
11 Correct 63 ms 144720 KB Output is correct
12 Correct 50 ms 144720 KB Output is correct
13 Correct 51 ms 144680 KB Output is correct

Subtask #6
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 143964 KB Output is correct
2 Correct 21 ms 143952 KB Output is correct
3 Correct 22 ms 143908 KB Output is correct
4 Correct 22 ms 143960 KB Output is correct
5 Correct 26 ms 143964 KB Output is correct
6 Correct 1252 ms 227528 KB Output is correct
7 Correct 1550 ms 227472 KB Output is correct
8 Correct 1756 ms 228148 KB Output is correct
9 Incorrect 2182 ms 235052 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #7
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 36 ms 125624 KB Output is correct
2 Correct 20 ms 125532 KB Output is correct
3 Correct 19 ms 125532 KB Output is correct
4 Correct 22 ms 127772 KB Output is correct
5 Correct 19 ms 123484 KB Output is correct
6 Correct 155 ms 129108 KB Output is correct
7 Correct 303 ms 131200 KB Output is correct
8 Correct 1481 ms 170288 KB Output is correct
9 Correct 1510 ms 193836 KB Output is correct
10 Correct 1442 ms 191528 KB Output is correct
11 Correct 1415 ms 222172 KB Output is correct
12 Correct 1381 ms 222304 KB Output is correct
13 Correct 1375 ms 226768 KB Output is correct
14 Correct 1364 ms 226640 KB Output is correct
15 Correct 23 ms 143960 KB Output is correct
16 Correct 20 ms 143964 KB Output is correct
17 Correct 20 ms 144128 KB Output is correct
18 Correct 20 ms 143960 KB Output is correct
19 Correct 20 ms 144100 KB Output is correct
20 Correct 33 ms 144144 KB Output is correct
21 Correct 190 ms 147152 KB Output is correct
22 Correct 24 ms 143964 KB Output is correct
23 Correct 30 ms 144220 KB Output is correct
24 Correct 196 ms 147156 KB Output is correct
25 Correct 108 ms 147028 KB Output is correct
26 Correct 196 ms 147264 KB Output is correct
27 Correct 172 ms 147400 KB Output is correct
28 Correct 362 ms 147860 KB Output is correct
29 Correct 2358 ms 235648 KB Output is correct
30 Correct 323 ms 148028 KB Output is correct
31 Correct 2303 ms 236056 KB Output is correct
32 Correct 1267 ms 231600 KB Output is correct
33 Correct 1723 ms 233520 KB Output is correct
34 Correct 2207 ms 239792 KB Output is correct
35 Correct 23 ms 143964 KB Output is correct
36 Correct 21 ms 144032 KB Output is correct
37 Correct 141 ms 146896 KB Output is correct
38 Correct 1430 ms 224180 KB Output is correct
39 Correct 1772 ms 224052 KB Output is correct
40 Correct 1747 ms 226132 KB Output is correct
41 Correct 2036 ms 227120 KB Output is correct
42 Incorrect 2137 ms 235052 KB Output isn't correct
43 Halted 0 ms 0 KB -