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Submission #634376

# Submission time Handle Problem Language Result Execution time Memory
634376 2022-08-24T10:15:13 Z l_reho Catfish Farm (IOI22_fish) C++17
9 / 100
 106 ms 12132 KB 
#include <bits/stdc++.h>
using namespace std;


vector<vector<int>> V;

struct info{
	int y;
	int w;
	int flag;
	
};


struct CustomCompare
{
	bool operator()(info const& p, info const& p1)
    {
        return (p.y > p1.y) || (p.y == p1.y && p.flag > p1.flag);
    }
};


long long max_weights(int N, int M, std::vector<int> X, std::vector<int> Y, std::vector<int> W){
	
	// se X[i] è pari, allora posso ergere ponti per prendere tutti
	
	bool subtask1 = true;
	bool subtask2 = true;
	bool subtask3 = true;
	bool subtask4 = true;
	
	long long ans = 0;
	
	// for(int i = 0; i < (int)X.size(); i++)
		// V[X[i]][Y[i]] = W[i];

	for(int i = 0; i < (int)X.size(); i++){
		subtask1 &= X[i] % 2 == 0;
		subtask2 &= X[i] <= 1;
		subtask3 &= Y[i] == 0;
		subtask4 &= N <= 300;
	}
	
	if(subtask1){
		ans = accumulate(W.begin(), W.end(), 0L);
		return ans;
	}
	
	if(subtask2){
		if(N == 1) return 0;
		
		if(N == 2){
			long long x0 = 0, x1 = 0;
			for(int i = 0; i < (int)X.size(); i++){
				if(X[i] == 1) x1 += W[i];
				else x0 += W[i];
			}	
			return max(x1, x0);
		}
		
		
		
		priority_queue<info, vector<info>, CustomCompare> pq;
		
		long long x1 = 0;
		for(int i = 0; i < (int)X.size(); i++){
			pq.push({Y[i], W[i], X[i] == 0});
			if(X[i] == 1) x1 += W[i];
		}
		
		long long curr = x1;
		
		ans = curr;
		while(!pq.empty()){
			info p = pq.top();
			pq.pop();
			
			
			if(p.flag) curr += p.w, ans = max(ans, curr);
			else curr -= p.w;
			
		}
		
		return ans;
		
	}
	
	if(subtask3){
		// dp particolare
		vector<array<int, 3>> A;
		
		long long dp[M][2];
		long long memo[M];
		
		for(int i = 0; i < M; i++) A.push_back({X[i], Y[i], W[i]});
		sort(A.begin(), A.end());
		
		if(M == 1)
			return W[0];
		
		// CONTINUO DOPO
		for(int i = 0; i < M; i++){
				
			if(i){
				if(abs(A[i-1][0] - A[i][0]) <= 1){		
					if(i >= 2){
						dp[i][1] = memo[i-2] + A[i][2];
						dp[i][0] = dp[i][1];
					}
					dp[i][1] = max(dp[i-1][0] + A[i][2], dp[i][1]);
					
				}else{
					dp[i][0] = memo[i-1] + A[i][2];
					dp[i][1] = dp[i][0];
				}				
			}else
				dp[i][1] = A[i][2];
			
			memo[i] = max(memo[i-1], max(dp[i][0], dp[i][1]));
		}
		
		if(A[M-1][0] == N-1){
			ans = max(memo[M-2], dp[M-1][0]);
		}else ans = memo[M-1];
		
		return ans;
	}
	

	
	return ans;
}

Subtask #1
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 27 ms 2132 KB Output is correct
2 Correct 28 ms 4100 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 106 ms 12132 KB Output is correct
6 Correct 90 ms 12108 KB Output is correct

Subtask #2
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 71 ms 7308 KB Output is correct
3 Correct 89 ms 11384 KB Output is correct
4 Correct 29 ms 3340 KB Output is correct
5 Correct 34 ms 4068 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 44 ms 4928 KB Output is correct
13 Correct 45 ms 5676 KB Output is correct
14 Correct 36 ms 4972 KB Output is correct
15 Correct 43 ms 5332 KB Output is correct
16 Correct 38 ms 4980 KB Output is correct
17 Correct 41 ms 5384 KB Output is correct

Subtask #3
0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 20 ms 3644 KB Output is correct
4 Correct 14 ms 2912 KB Output is correct
5 Incorrect 36 ms 6588 KB 1st lines differ - on the 1st token, expected: '1673106170551', found: '1673110383290'
6 Halted 0 ms 0 KB -

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB 1st lines differ - on the 1st token, expected: '3', found: '0'
2 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB 1st lines differ - on the 1st token, expected: '3', found: '0'
2 Halted 0 ms 0 KB -

Subtask #6
0 / 17.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB 1st lines differ - on the 1st token, expected: '3', found: '0'
2 Halted 0 ms 0 KB -

Subtask #7
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 20 ms 3644 KB Output is correct
4 Correct 14 ms 2912 KB Output is correct
5 Incorrect 36 ms 6588 KB 1st lines differ - on the 1st token, expected: '1673106170551', found: '1673110383290'
6 Halted 0 ms 0 KB -

Subtask #8
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 27 ms 2132 KB Output is correct
2 Correct 28 ms 4100 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 106 ms 12132 KB Output is correct
6 Correct 90 ms 12108 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 71 ms 7308 KB Output is correct
9 Correct 89 ms 11384 KB Output is correct
10 Correct 29 ms 3340 KB Output is correct
11 Correct 34 ms 4068 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 44 ms 4928 KB Output is correct
19 Correct 45 ms 5676 KB Output is correct
20 Correct 36 ms 4972 KB Output is correct
21 Correct 43 ms 5332 KB Output is correct
22 Correct 38 ms 4980 KB Output is correct
23 Correct 41 ms 5384 KB Output is correct
24 Correct 0 ms 212 KB Output is correct
25 Correct 0 ms 212 KB Output is correct
26 Correct 20 ms 3644 KB Output is correct
27 Correct 14 ms 2912 KB Output is correct
28 Incorrect 36 ms 6588 KB 1st lines differ - on the 1st token, expected: '1673106170551', found: '1673110383290'
29 Halted 0 ms 0 KB -