Submission #627733

#	Time	Username	Problem	Language	Result	Execution time	Memory
627733		tutis	메기 농장 (IOI22_fish)	C++17	0 / 100	1092 ms	30768 KiB

fish

#include "fish.h"

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
long long max_weights(int N, int MM, std::vector<int> X, std::vector<int> Y,
                      std::vector<int> W) {
    vector<pair<int, ll>>P[N];
    vector<int>Q_[N + 2];
    vector<int>*Q = Q_ + 1;
    for (int i = 0; i < MM; i++)
    {
        P[X[i]].push_back({Y[i], W[i]});
        Q[X[i]].push_back(Y[i]);
    }
    for (int i = -1; i <= N; i++)
    {
        Q[i].push_back(N - 1);
    }
    for (int i = 0; i < N; i++)
    {
        sort(P[i].begin(), P[i].end());
        for (int j = 1; j < (int)P[i].size(); j++)
            P[i][j].second += P[i][j - 1].second;
        sort(Q[i].begin(), Q[i].end());
    }
    ll dp_[N + 3];
    ll* dp = dp_ + 2;
    for (int i = -2; i <= N; i++)
        dp[i] = 0;
    vector<ll> u[N];
    vector<ll> d[N];
    auto get = [&](int x, int y)->ll
    {
        if (x < 0 || x >= N)
            return 0;
        auto it = lower_bound(P[x].begin(), P[x].end(), make_pair(y + 1, -1ll));
        if (it == P[x].begin())
            return 0;
        it--;
        return it->second;
    };
    map<int, ll>M;
    for (int i = -1; i <= N; i++)
        M[i] = 0;
    map<int, ll>K;
    for (int i = -1; i <= N; i++)
        K[i] = 0;
    auto get1 = [&](int y)->ll
    {
        ll ret = 0;
        for (auto i : M)
            if (i.first <= y)
                ret = max(ret, i.second);
        return ret;
    };
    auto get2 = [&](int y)->ll
    {
        ll ret = 0;
        for (auto i : K)
            if (i.first >= y)
                ret = max(ret, i.second);
        return ret;
    };
    ll vv = 0;
    for (int x = 0; x < N; x++)
    {
        dp[x] = dp[x - 1];
        dp[x] = max(dp[x], vv);
        vv = 0;
        for (int y : Q[x - 1])
        {
            u[x].push_back(0);
            ll&v = u[x].back();
            v = max(v, dp[x - 1]);
            v = max(v, dp[x - 2] + get(x - 1, y));
            for (int y1 : Q[x - 1])
            {
                if (y1 > y)
                    break;
                v = max(v, get(x - 1, y) - get(x - 1, y1 - 1) + get1(y1 - 1));
            }
            dp[x] = max(dp[x], v);
            vv = max(vv, v + get(x + 1, y));
        }
        for (int i = 0; i < Q[x - 1].size(); i++)
        {
            ll v = u[x][i];
            int y = Q[x - 1][i];
            M[y] = max(M[y], v);
        }
        for (int y : Q[x + 1])
        {
            d[x].push_back(0);
            ll&v = d[x].back();
            if (y == N - 1)
                v = max(v, u[x].back());
            v = max(v, get2(y + 1));
            dp[x] = max(dp[x], v);
            vv = max(vv, v + get(x + 1, y));
        }
        for (int i = 0; i < Q[x + 1].size(); i++)
        {
            ll v = d[x][i];
            int y = Q[x + 1][i];
            for (int y1 : Q[x - 1])
            {
                if (y1 > y)
                    break;
                ll v1 = v + get(x + 1, y) - get(x + 1, y1 - 1);
                K[y1] = max(K[y1], v1);
            }
        }
    }
    return dp[N - 1];
}

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:86:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   86 |         for (int i = 0; i < Q[x - 1].size(); i++)
      |                         ~~^~~~~~~~~~~~~~~~~
fish.cpp:102:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  102 |         for (int i = 0; i < Q[x + 1].size(); i++)
      |                         ~~^~~~~~~~~~~~~~~~~

• 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