oj.uz

Submission #881174

# Submission time Handle Problem Language Result Execution time Memory
881174 2023-11-30T18:36:01 Z eitanelb Cultivation (JOI17_cultivation) C++14
50 / 100
 79 ms 12584 KB 
#include<iostream>
#include<vector>
#include<string>
#include<fstream>
using namespace std;
#include<vector>
#include<iostream>
#include<set>
#include<algorithm>
using namespace std;
#define pi pair<int,int>
#define x first
#define y second
/*
for down - just real distances from down (optional also for left) -> O(n)
for up - just real distances, or such that together it's distance between two -> O(n)+O(n^2)
after I have up and down - O(n^2) //optional - O(nlogu), with segmentree sparse/coordination, then O(n^4 logU)
 
then O(n^5), or if r<=40 -> O(40*40*40*n)
which is 60 points
 
for 100 points, let's see that whenever you get the up bigger, it affects only one place
that can being it to O(n^3), which is 100 points
*/
 
 
int deb = 0;
pair<int, pi>* merge(pair<int, pi>* v1, pair<int, pi>* v2, int n1, int n2) {
	pair<int, pi>* v3 = new pair<int,pi>[n1+n2];
	int p1 = 0, p2 = 0, p3=0;
	while (p1 < n1 || p2 < n2) {
		if (p1 != n1 && (p2 == n2 || v1[p1].x <= v2[p2].x)) v3[p3++] = v1[p1++];
		else v3[p3++] = v2[p2++];
	}
	return v3;
}
int Time_To_Fool_The_Lab(int r, int c, int n, vector<int> X, vector<int> Y) {
	int* vdown = new int[n];
	pair<int, pi>* vup = new pair<int, pi>[n];
	int sz = n * (n - 1) / 2;
	pair<int, pi>* vsum = new pair<int, pi>[sz];
	int t = 0;
	for (int i = 0; i < n; i++) {
		vdown[i] = X[i] - 1;
	}
	for (int i = 0; i < n; i++) {
		vup[i] = {r - X[i], {i, -1}};
		for (int j = 0; j < n; j++) if (X[i] > X[j]) vsum[t++]={X[i] - X[j] - 1, {i, j}};
	}
	sort(vup, vup+n);
	sort(vsum, vsum + sz);
 
	int res = 2e9;
	for (int d = 0; d < n; d++) {
		int down = vdown[d];
		pair<int, pi>* vnup = new pair<int, pi>[sz];
		for (int i = 0; i < sz;i++) vnup[i] = {vsum[i].x - down,vsum[i].y};
		vnup = merge(vnup, vup,sz,n);
 
		bool* on = new bool[n];
		int *dr=new int[n], * dl = new int[n], * maxi = new int[n], * disl = new int[n], * disr = new int[n];
		for (int i = 0; i < n; i++) {
			on[i] = 0;
			if (X[i] == r) {
				dr[i] = dl[i] = 0;
				continue;
			}
			dr[i] = c - Y[i];
			dl[i] = Y[i] - 1;
			disl[i] = disr[i] = c;
			for (int j = 0; j < n; j++) {
				if (j == i) continue;
				if (X[j] > X[i] && X[j] - down <= X[i] + 1) {
					if (Y[j] > Y[i]) dr[i] = min(dr[i], Y[j] - Y[i] - 1);
					else if (Y[j] < Y[i]) dl[i] = min(dl[i], Y[i] - Y[j] - 1);
					else on[i] = 1;
 
					disr[i] = min(disr[i], c - Y[j]);
					disl[i] = min(disl[i], Y[j]-1);
				}
			}
		}
		multiset<int> maxs, sdl, sdr;
		for (int i = 0; i < n; i++) {
			if (on[i]) maxi[i] = max(dr[i], dl[i]);
			else maxi[i] = dr[i] + dl[i] + 1;
			maxs.insert(maxi[i]);
			sdl.insert(disl[i]);
			sdr.insert(disr[i]);
		}
		if (deb) {for (int i = 0; i < n; i++) {cout << dl[i] << ' ' << dr[i] << ' ' << maxi[i] << ' ' << on[i] << endl;}}
 
		// row 1 ************
		int mx1 = 0;
		set<int> st;
		for (int i = 0; i < n; i++)
			if (X[i] - down <= 1)
				st.insert(Y[i]);
		sdl.insert(*st.begin() - 1);
		sdr.insert(c - *prev(st.end()));
		int fr = 0;
		for (int i : st) {
			mx1 = max(mx1, i - fr - 1);
			fr = i;
		}
		maxs.insert(mx1);
 
		int up = 0;
 
		for (int q = 0; q < (n + sz);q++) {
			pair<int, pi> pr = vnup[q];
			up = pr.x;
			if (up < 0) continue;
			if (pr.y.y == -1) {
				int u = pr.y.x;
				maxs.erase(maxs.find(maxi[u]));
				sdl.erase(sdl.find(disl[u]));
				sdr.erase(sdr.find(disr[u]));
				maxi[u] = dr[u] = dl[u] = disr[u] = disl[u] = 0;
				maxs.insert(0); sdl.insert(0); sdr.insert(0);
			}
			else {
				int i = pr.y.x, j = pr.y.y;
				if (Y[i]== Y[j]) on[j] = 1;
				else if (Y[i] > Y[j]) {
					if (dr[j] > Y[i] - Y[j] - 1) {
						dr[j] = Y[i] - Y[j] - 1;
					}
				}
				else {
					if (dl[j] > Y[j] - Y[i] - 1) {
						dl[j] = Y[j] - Y[i] - 1;
					}
				}
 
				sdl.erase(sdl.find(disl[j]));
				sdr.erase(sdr.find(disr[j]));
				disr[j] = min(disr[j], c - Y[i]);
				disl[j] = min(disl[j], Y[i] - 1);
				sdl.insert(disl[j]);
				sdr.insert(disr[j]);
 
				maxs.erase(maxs.find(maxi[j]));
				if (on[j]) maxi[j] = max(dr[j], dl[j]);
				else maxi[j] = dr[j] + dl[j] + 1;
				maxs.insert(maxi[j]);
			}
			int mxla=*prev(sdl.end()), mxfa = *prev(sdr.end());
			int mx = *prev(maxs.end());
			if (mxla >= c || mxfa >= c) continue;
			mx = max(mx, mxla + mxfa);
			if (mx > 2e9 - up - down) continue;
			res = min(res, mx + down + up);
		}
	}
	return res;
}
 
 
 
 
 
 
 
int run = 1;
 
int main() {
	ios::sync_with_stdio(0); cin.tie(0);
	if (run == 1) {
		int R, C, N;
		cin >> R >> C >> N;
		vector<int> X(N), Y(N);
		for (int i = 0; i < N; i++) {
			cin >> X[i] >> Y[i];
		}
 
		int res = Time_To_Fool_The_Lab(R, C, N, X, Y);
 
		cout << res << endl;
	}
	if (run == 2) {
		vector<int> sizes = {0, 16, 16, 12, 20, 16, 3 };
		string name = "01-01";
		for(int j=1;j<2;j++){
			cout << "****" << j << "****\n";
			name[1] = '0' + j;
			for (int i = 13; i <= sizes[j]; i++) {
				cout << "**" << j << ' ' << i << "**\n";
				name[3] = '0' + i / 10; name[4] = '0' + i % 10;
				ifstream fin(name + ".in"), fout(name + ".out");
				int R, C, N;
				fin >> R >> C >> N;
				vector<int> X(N), Y(N);
				for (int i = 0; i < N; i++) {
					fin >> X[i] >> Y[i];
				}
 
				int nres, res = Time_To_Fool_The_Lab(R, C, N, X, Y);
 
				fout >> nres;
				if (nres != res) {
					cout << "subtask " << j << "test" << i << endl;
					cout << R << ' ' << C << endl << N << endl;
					for (int i = 0; i < N; i++) {
						cout << X[i] << ' ' << Y[i] << endl;
					}
					cout << res << ' ' << nres << endl;
					break;
				}
			}
		}
	}
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 424 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Incorrect 0 ms 348 KB Output isn't correct
14 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 424 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Incorrect 0 ms 348 KB Output isn't correct
14 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 424 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Incorrect 0 ms 348 KB Output isn't correct
14 Halted 0 ms 0 KB -

Subtask #4
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 2 ms 600 KB Output is correct
3 Correct 2 ms 604 KB Output is correct
4 Correct 1 ms 604 KB Output is correct
5 Correct 2 ms 604 KB Output is correct
6 Correct 2 ms 604 KB Output is correct
7 Correct 1 ms 604 KB Output is correct
8 Correct 1 ms 604 KB Output is correct
9 Correct 2 ms 604 KB Output is correct
10 Correct 2 ms 604 KB Output is correct
11 Correct 2 ms 604 KB Output is correct
12 Correct 2 ms 600 KB Output is correct
13 Correct 1 ms 604 KB Output is correct
14 Correct 2 ms 604 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 2 ms 604 KB Output is correct
17 Correct 2 ms 580 KB Output is correct
18 Correct 1 ms 604 KB Output is correct
19 Correct 1 ms 604 KB Output is correct
20 Correct 2 ms 604 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 2 ms 600 KB Output is correct
3 Correct 2 ms 604 KB Output is correct
4 Correct 1 ms 604 KB Output is correct
5 Correct 2 ms 604 KB Output is correct
6 Correct 2 ms 604 KB Output is correct
7 Correct 1 ms 604 KB Output is correct
8 Correct 1 ms 604 KB Output is correct
9 Correct 2 ms 604 KB Output is correct
10 Correct 2 ms 604 KB Output is correct
11 Correct 2 ms 604 KB Output is correct
12 Correct 2 ms 600 KB Output is correct
13 Correct 1 ms 604 KB Output is correct
14 Correct 2 ms 604 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 2 ms 604 KB Output is correct
17 Correct 2 ms 580 KB Output is correct
18 Correct 1 ms 604 KB Output is correct
19 Correct 1 ms 604 KB Output is correct
20 Correct 2 ms 604 KB Output is correct
21 Correct 65 ms 12304 KB Output is correct
22 Correct 71 ms 12228 KB Output is correct
23 Correct 16 ms 12376 KB Output is correct
24 Correct 24 ms 12584 KB Output is correct
25 Correct 64 ms 12368 KB Output is correct
26 Correct 71 ms 12372 KB Output is correct
27 Correct 65 ms 12440 KB Output is correct
28 Correct 63 ms 12324 KB Output is correct
29 Correct 73 ms 12372 KB Output is correct
30 Correct 65 ms 12372 KB Output is correct
31 Correct 79 ms 12372 KB Output is correct
32 Correct 61 ms 12376 KB Output is correct
33 Correct 15 ms 12380 KB Output is correct
34 Correct 53 ms 12372 KB Output is correct
35 Correct 66 ms 12292 KB Output is correct
36 Correct 31 ms 12376 KB Output is correct

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 424 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Incorrect 0 ms 348 KB Output isn't correct
14 Halted 0 ms 0 KB -