제출 #632529

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
632529		Red_Inside	메기 농장 (IOI22_fish)	C++17	52 / 100	1095 ms	577524 KiB

fish

#include "fish.h"
//
#include <bits/stdc++.h>

#define ll long long
#define f first
#define s second
#define pb push_back
#define mp make_pair
#define o cout<<"BUG"<<endl;
#define FOR(i, j, n) for(int j = i; j < n; ++j)
#define forn(i, j, n) for(int j = i; j <= n; ++j)
#define nfor(i, j, n) for(int j = n; j >= i; --j)
#define all(v) v.begin(), v.end()
#define ld long double
#define ull unsigned long long

using namespace std;
const int maxn=5000+100,LOG=20,mod=998244353;
int block = 106, timer = 0;
const ld EPS = 1e-18;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
#define IOS ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);

#define bt(i) (1 << (i))
//#define int ll
const ll inf=2e18;
#define y1 yy
#define prev pre
#define pii pair <int, int>

ll n, a[maxn][maxn], dp[maxn][maxn][2], dp1[maxn], dp2[maxn];
ll pref[maxn][maxn], prefdp[maxn][maxn], prefdp2[maxn][maxn], suffdp[maxn][maxn];

ll max_weights(int N, int m, vector <int> x, vector <int> y, vector <int> c)
{
	n = N;
	forn(0, i, m-1)
	{
		a[x[i]+1][y[i]+1] = c[i];
	}
	forn(1, i, n)
	{
		forn(1, j, n)
		{
			pref[i][j] = pref[i][j-1] + a[i][j];
		}
	}
	forn(1, j, n)
	{
		dp[1][j][0] = 0;
		dp[1][j][1] = -inf;
	}
	dp1[1] = 0;
	dp2[1] = 0;
	forn(1, j, n)
	{
		dp[0][j][0] = -inf;
		dp[0][j][1] = -inf;
	}
	suffdp[1][n + 1] = -inf;
	nfor(1, j, n)
	{
		suffdp[1][j] = max(max(dp[1][j][1], dp[1][j][0]) + pref[1+1][j], 
		suffdp[1][j + 1]);
	}
	prefdp[1][0] = -inf;
	prefdp2[1][0] = -inf;
	forn(1, j, n)
	{
		prefdp2[1][j] = max(prefdp2[1][j - 1], dp[1][j][0] - pref[1][j]);
		prefdp[1][j] = max(prefdp[1][j-1], max(dp[1][j][0], dp[1][j][1]));
	}
	prefdp[0][0] = -inf;
	forn(2, i, n)
	{
		dp1[i] = 0;
		forn(1, j, n)
		{
			dp[i][j][0] = dp2[i-1]+pref[i-1][j];
			dp[i][j][0] = max(dp[i][j][0], prefdp2[i-1][j-1] + pref[i-1][j]);
			dp[i][j][0] = max(dp[i][j][0], prefdp[i-2][j]+pref[i-1][j]);
			dp[i][j][0] = max(dp[i][j][0], suffdp[i-2][j+1]);
			dp[i][j][1] = -inf;
			dp[i][j][1] = max(dp[i][j][1], suffdp[i - 1][j + 1] - pref[i][j]);
			dp1[i] = max(dp1[i], max(dp[i-1][j][1], dp[i-1][j][0]) + pref[i][j]);
//			cout << i << " " << j << " " << dp[i][j][0] << " " << dp[i][j][1] << endl;
		}
		dp2[i] = max(dp2[i - 1], dp1[i - 1]);
		suffdp[i][n + 1] = -inf;
		nfor(1, j, n)
		{
			suffdp[i][j] = max(max(dp[i][j][1], dp[i][j][0]) + pref[i+1][j], 
			suffdp[i][j + 1]);
		}
		prefdp[i][0] = -inf;
		prefdp2[i][0] = -inf;
		forn(1, j, n)
		{
			prefdp2[i][j] = max(prefdp2[i][j - 1], dp[i][j][0] - pref[i][j]);
			prefdp[i][j] = max(prefdp[i][j-1], max(dp[i][j][0], dp[i][j][1]));
		}
		
	}
	ll ans = 0;
	forn(1, j, n)
	{
		ans = max(ans, dp[n][j][0]);
		ans = max(ans, dp[n][j][1]);
	}
	ans = max(ans, dp1[n]);
	ans = max(ans, dp2[n]);
	return ans;
}

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• Subtask 2: 0 / 6
• Subtask 3: 0 / 9
• Subtask 4: 14 / 14
• Subtask 5: 21 / 21
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