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Submission #1074293

# Submission time Handle Problem Language Result Execution time Memory
1074293 2024-08-25T09:27:38 Z Gromp15 Catfish Farm (IOI22_fish) C++17
12 / 100
 233 ms 56448 KB 
#include <bits/stdc++.h>
#include "fish.h"
#define ll long long
#define ar array
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
using namespace std;
 
const ll INF = 1e18;
template<typename T> bool ckmin(T &a, const T &b ) { return a > b ? a = b, 1 : 0; }
template<typename T> bool ckmax(T &a, const T &b ) { return a < b ? a = b, 1 : 0; }

long long max_weights(int n, int m, std::vector<int> x, std::vector<int> y, std::vector<int> w) {
	vector<vector<ar<ll, 2>>> each(n);
	for (int i = 0; i < m; i++) {
		each[x[i]].push_back({y[i], w[i]});
		each[x[i]].push_back({y[i]-1, 0});
	}
	for (int i = 0; i < n; i++) each[i].push_back({n-1, 0}), each[i].push_back({-1, 0});
	for (int i = 0; i < n; i++) {
		sort(all(each[i]));
		vector<ar<ll, 2>> nw;
		ll s = 0;
		for (int j = 0; j < sz(each[i]); j++) {
			int r = j;
			while (r+1 < sz(each[i]) && each[i][r+1][0] == each[i][r][0]) r++;
			for (int k = j; k <= r; k++) s += each[i][k][1];
			nw.push_back({each[i][j][0], s});
			j = r;
		}
		assert(is_sorted(all(nw)));
		swap(each[i], nw);
	}
	vector<vector<ll>> dp;
	auto query = [&](int pos, int x) {
		return prev(upper_bound(all(each[pos]), ar<ll, 2>{x, LLONG_MAX})) - each[pos].begin();
	};
	if (*max_element(all(x)) <= 1) {
		ar<ll, 2> ans{};
		for (int i = 0; i < m; i++) ans[x[i]] += w[i];
		ll ans2 = max(ans[0], ans[1]);
		for (auto [x, y] : each[1]) {
			ckmax(ans2, each[1].back()[1] - y + each[0][query(0, x)][1]);
		}
		return ans2;
	}
	vector<vector<ar<int, 3>>> val(n);
	for (int i = 0; i < n; i++) {
		val[i].resize(sz(each[i]));
		for (int k = 0; k < sz(each[i]); k++) {
			for (int j = -1; j <= 1; j++) {
				if (i + j >= 0 && i + j < n) {
					val[i][k][j+1] = query(i + j, each[i][k][0]);
				}
			}
		}
	}
	vector<vector<ll>> dp3, dp4, dp5;
	for (int i = 0; i < n; i++) {
		vector<vector<ll>> dp2;
		const int N = sz(each[i]);
		dp2.resize(i ? sz(each[i-1]) : 1, vector<ll>(N, -INF));
		if (!i) {
			for (int j = 0; j < N; j++) {
				dp2[0][j] = 0;
			}
			swap(dp, dp2);
		}
		else {
			dp3 = dp, dp4 = dp;
			for (int i = 1; i < sz(dp3); i++) for (int j = 0; j < sz(dp[i]); j++) ckmax(dp3[i][j], dp3[i-1][j]);
			if (i-2 >= 0) {
				for (int j = 0; j < sz(dp4); j++) for (int k = 0; k < sz(dp4[j]); k++) { 
					int R = val[i-2][j][2];
					dp4[j][k] = dp[j][k] + (k <= R ? each[i-1][R][1] - each[i-1][k][1] : 0);
				}
				for (int j = sz(dp4) - 2; j >= 0; j--) for (int k = 0; k < sz(dp4[j]); k++) {
					ckmax(dp4[j][k], dp4[j+1][k]);
				}
			}
			for (int k = 0; k < sz(dp[0]); k++) {
				for (int l = 0; l < N; l++) {
					int ans = 0;
					{
						int l2 = 0, r = i-2 >= 0 ? sz(each[i-2]) - 1 : -1;
						while (l2 <= r) {
							int mid = (l2+r)/2;
							if (val[i-2][mid][2] <= val[i][l][0]) ans = mid, l2 = mid+1;
							else r = mid-1;
						}
					}
					{
						int L = k, R = val[i][l][0];
						ll cost = L <= R ? each[i-1][R][1] - each[i-1][L][1] : 0;
						ckmax(dp2[k][l], dp3[ans][k] + cost);
					}
					if (ans + 1 < sz(dp)) ckmax(dp2[k][l], dp4[ans+1][k]);
				}
			}
			swap(dp, dp2);
		}
	}
	ll ans = -INF;
	for (int i = 0; i < sz(dp); i++) {
		for (int j = 0; j < sz(dp[i]); j++) {
			int L = j, R = val[n-2][i][2];
			ckmax(ans, dp[i][j] + (L <= R ? each[n-1][R][1] - each[n-1][L][1] : 0));
		}
	}
	return ans;
}

Subtask #1
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 51 ms 15924 KB Output is correct
2 Correct 66 ms 18112 KB Output is correct
3 Correct 17 ms 7260 KB Output is correct
4 Correct 17 ms 7260 KB Output is correct
5 Correct 233 ms 56448 KB Output is correct
6 Correct 226 ms 45908 KB Output is correct

Subtask #2
0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 114 ms 21752 KB Output is correct
3 Correct 105 ms 25504 KB Output is correct
4 Correct 79 ms 15804 KB Output is correct
5 Correct 59 ms 18316 KB Output is correct
6 Incorrect 0 ms 348 KB 1st lines differ - on the 1st token, expected: '4044', found: '6066'
7 Halted 0 ms 0 KB -

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 22 ms 7484 KB Output is correct
2 Correct 34 ms 12892 KB Output is correct
3 Correct 96 ms 16464 KB Output is correct
4 Correct 52 ms 15956 KB Output is correct
5 Correct 81 ms 21736 KB Output is correct
6 Correct 86 ms 21072 KB Output is correct
7 Correct 97 ms 21812 KB Output is correct
8 Correct 96 ms 21952 KB Output is correct

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Incorrect 0 ms 432 KB 1st lines differ - on the 1st token, expected: '4044', found: '6066'
4 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Incorrect 0 ms 432 KB 1st lines differ - on the 1st token, expected: '4044', found: '6066'
4 Halted 0 ms 0 KB -

Subtask #6
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Incorrect 0 ms 432 KB 1st lines differ - on the 1st token, expected: '4044', found: '6066'
4 Halted 0 ms 0 KB -

Subtask #7
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 22 ms 7484 KB Output is correct
2 Correct 34 ms 12892 KB Output is correct
3 Correct 96 ms 16464 KB Output is correct
4 Correct 52 ms 15956 KB Output is correct
5 Correct 81 ms 21736 KB Output is correct
6 Correct 86 ms 21072 KB Output is correct
7 Correct 97 ms 21812 KB Output is correct
8 Correct 96 ms 21952 KB Output is correct
9 Correct 105 ms 23104 KB Output is correct
10 Correct 106 ms 14088 KB Output is correct
11 Correct 139 ms 27108 KB Output is correct
12 Incorrect 1 ms 348 KB 1st lines differ - on the 1st token, expected: '4044', found: '6066'
13 Halted 0 ms 0 KB -

Subtask #8
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 51 ms 15924 KB Output is correct
2 Correct 66 ms 18112 KB Output is correct
3 Correct 17 ms 7260 KB Output is correct
4 Correct 17 ms 7260 KB Output is correct
5 Correct 233 ms 56448 KB Output is correct
6 Correct 226 ms 45908 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 114 ms 21752 KB Output is correct
9 Correct 105 ms 25504 KB Output is correct
10 Correct 79 ms 15804 KB Output is correct
11 Correct 59 ms 18316 KB Output is correct
12 Incorrect 0 ms 348 KB 1st lines differ - on the 1st token, expected: '4044', found: '6066'
13 Halted 0 ms 0 KB -