Submission #732551

#	Time	Username	Problem	Language	Result	Execution time	Memory
732551		math_rabbit_1028	Catfish Farm (IOI22_fish)	C++17	18 / 100	456 ms	84044 KiB

fish

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

long long zero[101010], full[101010];
vector< pair<int, long long> > ylist[101010];
vector< long long > sum[101010], dp[2][101010];

long long max_weights(int N, int M, std::vector<int> X, std::vector<int> Y, std::vector<int> W) {
    for (int i = 0; i < M; i++) {
        X[i] += 1;
        Y[i] += 1;
        ylist[X[i]].push_back({Y[i], 0});
        ylist[X[i] - 1].push_back({Y[i], 0});
        ylist[X[i] + 1].push_back({Y[i], 0});
    }

    for (int i = 0; i <= N + 1; i++) {
        ylist[i].push_back({0, 0});
        ylist[i].push_back({N, 0});
        sort(ylist[i].begin(), ylist[i].end());
        ylist[i].erase(unique(ylist[i].begin(), ylist[i].end()), ylist[i].end());
    }

    for (int i = 0; i < M; i++) {
        int idx = lower_bound(ylist[X[i]].begin(), ylist[X[i]].end(), make_pair(Y[i], 0LL)) - ylist[X[i]].begin();
        ylist[X[i]][idx].second = W[i];
    }

    for (int i = 0; i <= N + 1; i++) {
        sum[i].push_back(0);
        for (int j = 1; j < ylist[i].size(); j++) {
            sum[i].push_back(sum[i].back() + ylist[i][j].second);
        }
    }

    for (int i = 0; i <= N + 1; i++) {
        for (int j = 0; j < ylist[i].size(); j++) dp[0][i].push_back(0);
        for (int j = 0; j < ylist[i].size(); j++) dp[1][i].push_back(0);
    }
    for (int j = 1; j < ylist[0].size() - 1; j++) dp[0][0][j] = -1e18;
    for (int j = 1; j < ylist[0].size() - 1; j++) dp[1][0][j] = -1e18;
    full[0] = -1e18;
    for (int i = 2; i <= N + 1; i++) {
        long long val0 = 0, val1 = 0;
        for (int k = 1; k < ylist[i - 1].size() - 1; k++) {
            int j = lower_bound(ylist[i].begin(), ylist[i].end(), make_pair(ylist[i - 1][k].first, 0LL))
                  - ylist[i].begin();
            val0 = max(val0, dp[0][i - 1][k] - sum[i - 1][k]);
            val1 = max(val1, dp[1][i - 1][k] + sum[i][j]);
        }
        for (int j = 1; j < ylist[i].size() - 1; j++) {
            int k = lower_bound(ylist[i - 1].begin(), ylist[i - 1].end(), make_pair(ylist[i][j].first, 0LL))
                  - ylist[i - 1].begin();
            val0 = max(val0, dp[0][i - 1][k] - sum[i - 1][k]);
            val1 = max(val1, dp[1][i - 1][k] + sum[i][j]);
        }
        zero[i] = max(val1, max(zero[i - 1], full[i - 1] + sum[i][ylist[i].size() - 1]));
        for (int j = 1; j < ylist[i].size() - 1; j++) {
            dp[1][i][j] = max(dp[1][i][j], val1 - sum[i][j]);
            dp[1][i][j] = max(dp[1][i][j], full[i - 1] + sum[i][ylist[i].size() - 1] - sum[i][j]);
        }

        for (int j = 1; j < ylist[i].size() - 1; j++) {
            int k = lower_bound(ylist[i - 1].begin(), ylist[i - 1].end(), make_pair(ylist[i][j].first, 0LL))
                  - ylist[i - 1].begin();
            dp[0][i][j] = max(dp[0][i][j], val0 + sum[i - 1][k]);
            dp[0][i][j] = max(dp[0][i][j], zero[i - 2] + sum[i - 1][k]);
            dp[0][i][j] = max(dp[0][i][j], full[i - 2] + sum[i - 1][ylist[i - 1].size() - 1]);
        }
        long long val2 = 0;
        int l = 1;
        for (int j = 1; j < ylist[i].size() - 1; j++) {
            int k = lower_bound(ylist[i - 1].begin(), ylist[i - 1].end(), make_pair(ylist[i][j].first, 0LL))
                  - ylist[i - 1].begin();
            while (l <= ylist[i - 2].size() - 2 && ylist[i - 2][l].first <= j) {
                val2 = max(val2, dp[1][i - 2][l]);
                l++;
            }
            dp[0][i][j] = max(dp[0][i][j], val2 + sum[i - 1][k]);
        }
        long long val3 = 0;
        l = ylist[i - 2].size() - 2;
        for (int j = ylist[i].size() - 1; j >= 1; j--) {
            int k = lower_bound(ylist[i - 1].begin(), ylist[i - 1].end(), make_pair(ylist[i][j].first, 0LL))
                  - ylist[i - 1].begin();
            while (l >= 1 && ylist[i - 2][l].first >= j) {
                val3 = max(val3, dp[1][i - 2][l] + sum[i - 1][k]);
                l--;
            }
            dp[0][i][j] = max(dp[0][i][j], val3);
        }

        full[i] = max(val0 + sum[i - 1][ylist[i - 1].size() - 1], full[i - 1]);
        full[i] = max(full[i], zero[i - 2] + sum[i - 1][ylist[i - 1].size() - 1]);
        full[i] = max(full[i], full[i - 2] + sum[i - 1][ylist[i - 1].size() - 1]);
        full[i] = max(full[i], val2 + sum[i - 1][ylist[i - 1].size() - 1]);


    }
    long long res = 0;
    res = zero[N + 1];
    return res;
}

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:33:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |         for (int j = 1; j < ylist[i].size(); j++) {
      |                         ~~^~~~~~~~~~~~~~~~~
fish.cpp:39:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |         for (int j = 0; j < ylist[i].size(); j++) dp[0][i].push_back(0);
      |                         ~~^~~~~~~~~~~~~~~~~
fish.cpp:40:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |         for (int j = 0; j < ylist[i].size(); j++) dp[1][i].push_back(0);
      |                         ~~^~~~~~~~~~~~~~~~~
fish.cpp:42:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |     for (int j = 1; j < ylist[0].size() - 1; j++) dp[0][0][j] = -1e18;
      |                     ~~^~~~~~~~~~~~~~~~~~~~~
fish.cpp:43:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |     for (int j = 1; j < ylist[0].size() - 1; j++) dp[1][0][j] = -1e18;
      |                     ~~^~~~~~~~~~~~~~~~~~~~~
fish.cpp:47:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   47 |         for (int k = 1; k < ylist[i - 1].size() - 1; k++) {
      |                         ~~^~~~~~~~~~~~~~~~~~~~~~~~~
fish.cpp:53:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 |         for (int j = 1; j < ylist[i].size() - 1; j++) {
      |                         ~~^~~~~~~~~~~~~~~~~~~~~
fish.cpp:60:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   60 |         for (int j = 1; j < ylist[i].size() - 1; j++) {
      |                         ~~^~~~~~~~~~~~~~~~~~~~~
fish.cpp:65:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   65 |         for (int j = 1; j < ylist[i].size() - 1; j++) {
      |                         ~~^~~~~~~~~~~~~~~~~~~~~
fish.cpp:74:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   74 |         for (int j = 1; j < ylist[i].size() - 1; j++) {
      |                         ~~^~~~~~~~~~~~~~~~~~~~~
fish.cpp:77:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   77 |             while (l <= ylist[i - 2].size() - 2 && ylist[i - 2][l].first <= j) {
      |                    ~~^~~~~~~~~~~~~~~~~~~~~~~~~~

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