Submission #871703

#	Time	Username	Problem	Language	Result	Execution time	Memory
871703		Ludissey	Catfish Farm (IOI22_fish)	C++17	0 / 100	54 ms	28144 KiB

fish

#include "fish.h"
#include <bits/stdc++.h>
#define int long long
using namespace std;
vector<int> a;
vector<vector<vector<int>>> memo;
int N,M;
int dp(int x, int last, int lastlast){
  if(memo[x][last][lastlast]!=-1) return memo[x][last][lastlast];
  if(x==N){
    if(last&&!lastlast) return memo[x][last][lastlast]=a[x-2];
    if(!last&&lastlast) return memo[x][last][lastlast]=a[x-1];
    return memo[x][last][lastlast]=0;
  }
  int take=dp(x+1, 1, last);
  if(last==0&&x>0) take+=a[x-1];
  int notake=dp(x+1, 0, last);
  if(lastlast==1&&last==0) notake+=a[x-1]; 
  return memo[x][last][lastlast] = max(take, notake);
}

long long max_weights(signed n, signed m, std::vector<signed> X, std::vector<signed> Y, std::vector<signed> W) {
  N=n; M=m; 
  a.resize(N, 0);
  memo.resize(N+1, vector<vector<int>>(2, vector<int>(2,-1)));
  for (int i = 0; i < M; i++) a[X[i]] = W[i];
  int p=dp(0,0,0);
  return p;
}

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