Submission #724144

#	Time	Username	Problem	Language	Result	Execution time	Memory
724144		ismayil	Catfish Farm (IOI22_fish)	C++17	9 / 100	59 ms	9924 KiB

fish

#pragma GCC optimize("O3")
#include "fish.h"
#include <bits/stdc++.h>
#define ll long long
#define endl '\n'
using namespace std;
const ll INF = 3e14 + 4; 
ll max_weights(int N, int M, vector<int> X, vector<int> Y, vector<int> W) {
	int flag = 0;
	for(int i = 0; i < M; i++){
		if(Y[i] != 0){
			flag = 1;
		}
	}
	if(!flag){
		ll dp[N][2], a[N];
		memset(dp, 0, sizeof(dp)); memset(a, 0, sizeof(a));
		for(int i = 0; i < M; i++) a[X[i]] += W[i]; 
		dp[1][0] = a[1];
		dp[1][1] = a[0];
		for(int i = 2; i < N; i++){
			dp[i][0] = max(dp[i - 1][1] + a[i], dp[i - 1][0]);
			dp[i][1] = max(max(dp[i - 2][0] + a[i - 1], dp[i - 1][1]), dp[i - 2][1] + a[i - 1]);
		}
		return max(dp[N - 1][0], dp[N - 1][1]);
	}
	ll ans[N + 1][2];
	memset(ans, 0, sizeof(ans));
	for(int i = 0; i < M; i++){
		ans[Y[i] + 1][X[i]] = W[i];
	}
	for(int i = 1; i <= N; i++){
		ans[i][0] += ans[i - 1][0];
		ans[i][1] += ans[i - 1][1];
	}
	ll res = 0;
	for (int i = 1; i <= N; i++)
	{
		res = max(res, ans[i - 1][0] + (ans[N][1] - ans[i - 1][1]));
	}
	return res;
}

• Subtask 1: 0 / 3
• Subtask 2: 0 / 6
• Subtask 3: 9 / 9
• Subtask 4: 0 / 14
• Subtask 5: 0 / 21
• Subtask 6: 0 / 17
• Subtask 7: 0 / 14
• Subtask 8: 0 / 16