Submission #709832

#	Time	Username	Problem	Language	Result	Execution time	Memory
709832		myrcella	Catfish Farm (IOI22_fish)	C++17	52 / 100	436 ms	300496 KiB

fish

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

using namespace std;

#define fi first
#define se second
#define pii pair<int,int>
#define pll pair<long long,long long>
#define pb push_back
#define debug(x) cerr<<#x<<"="<<x<<endl
#define pq priority_queue
#define inf 0x3f
#define rep(i,a,b) for (int i=a;i<(b);i++)
#define MP make_pair
#define SZ(x) (int(x.size()))
#define ll long long
#define mod 1000000007
#define ALL(x) x.begin(),x.end()
void inc(int &a,int b) {a=(a+b)%mod;}
void dec(int &a,int b) {a=(a-b+mod)%mod;}
int lowbit(int x) {return x&(-x);}
ll p0w(ll base,ll p) {ll ret=1;while(p>0){if (p%2ll==1ll) ret=ret*base%mod;base=base*base%mod;p/=2ll;}return ret;}

const int maxn = 3010;
ll dp[maxn][maxn][2];
int y[maxn*maxn];
int w[maxn][maxn];
int xmax,ymax;

long long max_weights(int N, int M, std::vector<int> X, std::vector<int> Y,std::vector<int> W) {
	rep(i,0,M) {
		y[i] = Y[i];
		y[i]++;
		w[X[i]][y[i]]=W[i];
		xmax = max(X[i],xmax);
		ymax = max(y[i],ymax);
	}
	ll ans = 0;
	rep(i,0,N) rep(j,1,N+1) dp[i][j][0] = dp[i][j][1] = -1e18;
	dp[0][0][0] = dp[0][N][1] = 0;
	rep(i,1,N) {
		//increasing
		dp[i][0][0] = dp[i-1][0][0];
		rep(j,1,N+1) {
			dp[i][j][0] = max(dp[i-1][j][0],dp[i][j-1][0] + w[i-1][j]);
		}
		dp[i][N][1] = dp[i-1][N][1];
		for (int j = N-1;j>=0;j--) {
			dp[i][j][1] = max(dp[i-1][j][1],dp[i][j+1][1] + w[i][j+1]);
		}
		dp[i][0][0] = max(dp[i][0][0],dp[i-1][0][1]);
		ll tmp = 0;
		rep(j,1,N+1) tmp += w[i-1][j];
		if (i-2>=0) dp[i][N][1] = max(dp[i][N][1],dp[i-2][N][1]+tmp);
		dp[i][N][0] = dp[i][N][1] = max(dp[i][N][0],dp[i][N][1]);
		rep(j,0,N+1) {
			ans = max(ans,max(dp[i][j][0],dp[i][j][1]));
//			cout<<i<<" "<<j<<" "<<dp[i][j][0]<<" "<<dp[i][j][1];debug(w[i][1]);
		}
	}
  return ans;
}

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