Submission #1069324

#	Time	Username	Problem	Language	Result	Execution time	Memory
1069324		beaconmc	Catfish Farm (IOI22_fish)	C++17	0 / 100	169 ms	102656 KiB

fish

#include "fish.h"

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
#define FOR(i,x,y) for(ll i=x; i<y; i++)
#define FORNEG(i,x,y) for(ll i=x; i>y; i--)

const ll maxn = 100005;


unordered_set<ll> fish[maxn];

map<vector<ll>, ll> weights;

ll dp[8][8][maxn];

unordered_set<ll> temppos[maxn];
vector<ll> possibles[maxn];

long long max_weights(int N, int M, std::vector<int> X, std::vector<int> Y,
                      std::vector<int> W) {
    FOR(i,0,8){
        FOR(j,0,8){
            FOR(k,0,maxn){
                dp[i][j][k] = 0;
            }
        }
    }
    FOR(i,0,maxn) temppos[i].insert(0);


    FOR(i,0,M){
        Y[i]++;
        fish[X[i]].insert(Y[i]);
        weights[{X[i], Y[i]}] = W[i];
        if (X[i] > 0) temppos[X[i]-1].insert(Y[i]);
        temppos[X[i]+1].insert(Y[i]);
        temppos[X[i]].insert(Y[i]);
    }
    FOR(i,0,maxn){
        for (auto&k : temppos[i]) possibles[i].push_back(k);
    }

    FOR(k,0,N){
        FOR(X,0,8){
            FOR(Y,0,8){
                ll i=0,j=0;
 
                if (k>=2 && possibles[k-2].size() <= X) continue;
                else if (k>=2) i = possibles[k-2][X];
                if (k>=1 && possibles[k-1].size() <= Y) continue;
                else if (k>=1) j  = possibles[k-1][Y];
                


                ll temp = 0;
                FOR(Z, 0, 8){
                    if (possibles[k].size() <= Z) continue;
                    ll height = possibles[k][Z];

                    if (fish[k+1].count(height)) temp += weights[{k+1, height}];

                    if (fish[k].count(height) && j>=height) temp -= weights[{k, height}];

                    if (k>0 && fish[k-1].count(height) && i < height && j<height) temp += weights[{k-1, height}];

                    dp[Y][Z][k+1] = max(dp[Y][Z][k+1], dp[X][Y][k] + temp);
                }
            }
        }
    }




    ll ans = 0;
    FOR(i,0,8){
        FOR(j,0,8){
            FOR(k,0,N+1){
                ans = max(ans, dp[i][j][k]);
                //if (dp[i][j][k]==11) cout << i << " " << j << " " << k << endl;

            }
        }
    }
    return ans;





}

Compilation message (stderr)

fish.cpp: In function 'long long int max_weights(int, int, std::vector<int>, std::vector<int>, std::vector<int>)':
fish.cpp:51:51: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'll' {aka 'long long int'} [-Wsign-compare]
   51 |                 if (k>=2 && possibles[k-2].size() <= X) continue;
      |                             ~~~~~~~~~~~~~~~~~~~~~~^~~~
fish.cpp:53:51: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'll' {aka 'long long int'} [-Wsign-compare]
   53 |                 if (k>=1 && possibles[k-1].size() <= Y) continue;
      |                             ~~~~~~~~~~~~~~~~~~~~~~^~~~
fish.cpp:60:45: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'll' {aka 'long long int'} [-Wsign-compare]
   60 |                     if (possibles[k].size() <= Z) continue;
      |                         ~~~~~~~~~~~~~~~~~~~~^~~~

• 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