oj.uz

Submission #635137

# Submission time Handle Problem Language Result Execution time Memory
635137 2022-08-25T13:38:10 Z l_reho Catfish Farm (IOI22_fish) C++17
18 / 100
 94 ms 8152 KB 
#include "fish.h"

#include <cassert>
#include <cstdio>

#include <vector>

#include "fish.h"
 
#include <cassert>
#include <cstdio>
 
// BEGIN SECRET
#include <string>
// END SECRET
#include <vector>
 
#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){
		long long dp[M][3];
		
		for(int i = 0; i < M; i++)
			for(int j = 0; j < 3; j++) dp[i][j] = 0;
		
		
		vector<pair<int, int>> V;
		
		for(int i = 0; i < M; i++) V.push_back({X[i], W[i]});
			
		sort(V.begin(), V.end());
		
		
		dp[0][0] = V[0].second;
		
		if(V[0].first != 0) {
					
			dp[0][1] = V[0].second;
		}
		
		dp[0][2] = max(dp[0][1], dp[0][0]);
		
		for(int i = 1; i < M; i++){
		
			if(abs(V[i].first-V[i-1].first) == 1){
				
				if(V[i].first < N-1)
					dp[i][0] = dp[i-1][1]+V[i].second;
			
				if(i >= 2){
					dp[i][1] = dp[i-2][2] + V[i].second;
				}else dp[i][1] = V[i].second;
			
				dp[i][2] = max(dp[i-1][2], max(dp[i][0], dp[i][1]));
			}else{
				
				dp[i][1] = dp[i][2] = dp[i-1][2] + V[i].second;
				if(V[i].first < N-1)
					dp[i][0] = dp[i][1];
				
			}
		}
		
		
		return dp[M-1][2];		
	}
	
	if(subtask4){
		long long mat[N][N];
		long long pref[N][N][2];
		long long suff[N][N][2];
		long long memo[N];
		for(int i = 0; i < N; i++){
			for(int j = 0; j < N; j++){
				pref[i][j][0] = 0;
				pref[i][j][1] = 0;
				suff[i][j][0] = 0;
				suff[i][j][1] = 0;
			
				mat[i][j] = 0;
			}	
			memo[i] = 0;
		}
		
		for(int i = 0; i <  M; i++) mat[N-Y[i]-1][X[i]] = W[i];
		
		long long sum = 0;
		for(int i = N-1; i >= 0; i--){
			sum += mat[i][0];
			pref[i][0][0] = sum;
			memo[0] = max({memo[0], pref[i][0][0]});
		}
		
		sum = 0;
		for(int i = 0; i < N; i++){
			sum += mat[i][0];
			suff[i][0][0] = sum;
			memo[0] = max({memo[0], suff[i][0][0]});
		}
		
		
		for(int j = 1; j < N; j++){
			sum = 0;
			
			// popoliamo pref
			for(int i = N-1; i >= 0; i--){
				// il prefisso lo posso combinare con il prefisso della colonna precedente
				// o con il suffisso della colonna precedente, ma entrambi applicando la colonna a sinistra
				sum += mat[i][j];
				
				for(int k = 0; k < N; k++){
					
					if(j < N-1){
						pref[i][j][0] = max(pref[i][j][0], pref[k][j-1][1] + sum);
						pref[i][j][0] = max(pref[i][j][0], suff[k][j-1][1] + sum);
					}
					if(k < i)
						pref[i][j][1] = max(pref[i][j][1], suff[k][j-1][1] + sum);
					
				}
						
				pref[i][j][1] = max(pref[i][j][1], sum);
				if(j < N-1)
					pref[i][j][0] = max(pref[i][j][0], sum);
				
				if(j >= 2){
					
					if(j < N-1)
						pref[i][j][0] = max(pref[i][j][0], memo[j-2] + sum);					
					pref[i][j][1] = max(pref[i][j][1], memo[j-2] + sum);
				}
				
				memo[j] = max({memo[j], memo[j-1], max(pref[i][j][0], pref[i][j][1])});
				
			}
			
			// adesso dobbiamo popolare suff qui i cazzi sono peggiori
			
			sum = 0;
			
			for(int i = 0; i < N; i++){
				sum += mat[i][j];
				
				for(int k = 0; k < N; k++){
					
					if(j < N-1){
						suff[i][j][0] = max(suff[i][j][0], pref[k][j-1][1] + sum);
						suff[i][j][0] = max(suff[i][j][0], suff[k][j-1][1] + sum);
					}
					
					if(k > i && j < N-1){
						suff[i][j][0] = max(suff[i][j][0], pref[k][j-1][0] + sum);
					}
					
				}
				
				suff[i][j][1] = max(suff[i][j][1], sum);
				
				if(j < N-1)
					suff[i][j][0] = max(suff[i][j][0], sum);
				
				if(j >= 2){
					if(j < N-1)
						suff[i][j][0] = max(suff[i][j][0], memo[j-2] + sum);					
					suff[i][j][1] = max(suff[i][j][1], memo[j-2] + sum);
				}
				
				memo[j] = max({memo[j], memo[j-1], max(suff[i][j][0], suff[i][j][1])});
				
			}
			
		}
		return memo[N-1];
	}
 
	
	return ans;
}

Subtask #1
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 2132 KB Output is correct
2 Correct 26 ms 2628 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 79 ms 7264 KB Output is correct
6 Correct 84 ms 7264 KB Output is correct

Subtask #2
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 76 ms 7304 KB Output is correct
3 Correct 94 ms 8152 KB Output is correct
4 Correct 23 ms 2148 KB Output is correct
5 Correct 28 ms 2644 KB Output is correct
6 Correct 0 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 0 ms 212 KB Output is correct
12 Correct 35 ms 3820 KB Output is correct
13 Correct 45 ms 4296 KB Output is correct
14 Correct 35 ms 3788 KB Output is correct
15 Correct 40 ms 4048 KB Output is correct
16 Correct 34 ms 3804 KB Output is correct
17 Correct 39 ms 4036 KB Output is correct

Subtask #3
9.0 / 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 27 ms 3408 KB Output is correct
4 Correct 17 ms 2656 KB Output is correct
5 Correct 34 ms 6084 KB Output is correct
6 Correct 37 ms 6100 KB Output is correct
7 Correct 34 ms 6072 KB Output is correct
8 Correct 36 ms 6080 KB Output is correct

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: '2'
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: '2'
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: '2'
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 27 ms 3408 KB Output is correct
4 Correct 17 ms 2656 KB Output is correct
5 Correct 34 ms 6084 KB Output is correct
6 Correct 37 ms 6100 KB Output is correct
7 Correct 34 ms 6072 KB Output is correct
8 Correct 36 ms 6080 KB Output is correct
9 Incorrect 23 ms 2644 KB 1st lines differ - on the 1st token, expected: '99999', found: '0'
10 Halted 0 ms 0 KB -

Subtask #8
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 2132 KB Output is correct
2 Correct 26 ms 2628 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 79 ms 7264 KB Output is correct
6 Correct 84 ms 7264 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 76 ms 7304 KB Output is correct
9 Correct 94 ms 8152 KB Output is correct
10 Correct 23 ms 2148 KB Output is correct
11 Correct 28 ms 2644 KB Output is correct
12 Correct 0 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 0 ms 212 KB Output is correct
18 Correct 35 ms 3820 KB Output is correct
19 Correct 45 ms 4296 KB Output is correct
20 Correct 35 ms 3788 KB Output is correct
21 Correct 40 ms 4048 KB Output is correct
22 Correct 34 ms 3804 KB Output is correct
23 Correct 39 ms 4036 KB Output is correct
24 Correct 0 ms 212 KB Output is correct
25 Correct 0 ms 212 KB Output is correct
26 Correct 27 ms 3408 KB Output is correct
27 Correct 17 ms 2656 KB Output is correct
28 Correct 34 ms 6084 KB Output is correct
29 Correct 37 ms 6100 KB Output is correct
30 Correct 34 ms 6072 KB Output is correct
31 Correct 36 ms 6080 KB Output is correct
32 Incorrect 0 ms 212 KB 1st lines differ - on the 1st token, expected: '3', found: '2'
33 Halted 0 ms 0 KB -