Submission #1214705

#	Time	Username	Problem	Language	Result	Execution time	Memory
1214705		dosts	Catfish Farm (IOI22_fish)	C++20	0 / 100	54 ms	17772 KiB

fish

#include "fish.h"
#include <bits/stdc++.h>
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2")
#define int long long
#define pii pair<int,int>
#define vi vector<int>
#define ff first
#define ss second
#define sp << " " <<
#define all(x) x.begin(),x.end()
#define big(x) ((int)(x.size()))
using namespace std;
const int MOD = 1e9+7, LIM = 1e6+1, inf = 2e9;
const int N = 100001;
int pref[N][1];
inline int get(int col,int l,int r) {
  if (l > r) return 0ll;
  return pref[col][r]-pref[col][l-1];
};
int max_weights(int32_t N, int32_t M, vector<int32_t> X,vector<int32_t> Y, vector<int32_t> W) {
  vi pos[N+2];
  vi stuf[N+1];
  for (int i=0;i<M;i++) X[i]++,Y[i]++;
  for (int i = 0;i<M;i++) stuf[X[i]].push_back(Y[i]);
  pos[0] = {0};
  pos[N+1] = {0};
  for (int i = 1;i<=N;i++) {
    if (i>1) for (auto it : stuf[i-1]) pos[i].push_back(it);
    if (i<N) for (auto it : stuf[i+1]) pos[i].push_back(it);
    pos[i].push_back(0);
    sort(all(pos[i]));
    pos[i].erase(unique(all(pos[i])),pos[i].end());
  }
  int dp[N+2][2][2]{};
  for (int i = 0;i<M;i++) pref[X[i]][Y[i]]+=W[i];
  int ans = 0;
  for (int i = 1ll;i<=N+1;i++) {
    for (int k = 0ll;k<big(pos[i]);k++) {
      for (int j = 0ll;j<big(pos[i-1]);j++) {
        int h = pos[i][k];
        if (i >= 2) {
          for (int s = 0;s<big(pos[i-2]);s++) {
            int l = pos[i-2][s];
            if (h >= pos[i-1][j] && j && l >= pos[i-1][j]) break;
            dp[i][j][k] = max(dp[i][j][k],
                          dp[i-1][s][j]+get(i-1,pos[i-1][j]+1,max(l,h)));
          }
        }
        else{
          int l = 0;
          dp[i][j][k] = get(i-1,pos[i-1][j]+1,max(l,h));
        }
        //cout << i sp j sp k sp dp[i][j][k] << '\n';
        ans = max(ans,dp[i][j][k]);
      }
    }
  }
  return ans;
}

• 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