Submission #843883

#	Time	Username	Problem	Language	Result	Execution time	Memory
843883		ogkostya	Overtaking (IOI23_overtaking)	C++17	65 / 100	3509 ms	18256 KiB

overtaking

#include "overtaking.h"
#include <algorithm>
#include <utility>

std::vector<std::vector<std::pair<long long, long long>>> SS(1001, std::vector<std::pair<long long, long long>>());


struct sort1
{
    inline bool operator() (const std::pair<long long, int>& a, const std::pair<long long, int>& b)
    {
        return (a.first < b.first);
    }
};

struct sort2
{
    inline bool operator() (const std::pair<long long, long long>& a, const std::pair<long long, long long>& b)
    {
        return a.first < b.first;
    }
};

void sortVecPair(std::vector<long long>& vecA, std::vector<int>& vecB)
{
    std::vector<std::pair<long long, int>> vecC;
    vecC.reserve(vecA.size());
    for (int i = 0; i < vecA.size(); i++)
    {
        vecC.push_back(std::make_pair(vecA[i], vecB[i]));
    }

    std::sort(vecC.begin(), vecC.end(), sort1());

    vecA.clear();
    vecB.clear();
    vecA.reserve(vecC.size());
    vecB.reserve(vecC.size());
    for (int i = 0; i < vecC.size(); i++)
    {
        vecA.push_back(vecC[i].first);
        vecB.push_back(vecC[i].second);
    }
}

int _M;
std::vector<int> _S;
int _X;

void init(int L, int N, std::vector<long long> T, std::vector<int> W, int X, int M, std::vector<int> S)
{
    _X = X;
    _M = M;
    _S = S;

    sortVecPair(T, W);

	for (int i = 0; i < N; i++)
	{
        if (W[i] < X)
            continue;

        long long a = T[i];
        for (int j = 1; j < M; j++)
        {
            long long b = a + 1LL * (_S[j] - _S[j - 1]) * W[i];

            for (int k = 0; k < SS[j].size(); k++)
            {
                if (SS[j][k].first < a && SS[j][k].second > b)
                    b = SS[j][k].second;
            }
            SS[j].push_back(std::make_pair(a, b));

            a = b;
        }
	}

    for (int j = 1; j < M; j++)
    {
        std::sort(SS[j].begin(), SS[j].end(), sort2());

        std::vector<std::pair<long long, long long>> sorted;

        long long b = 0;
        for (int i = 0; i < SS[j].size(); i++)
        {
            if (b < SS[j][i].second)
            {
                b = SS[j][i].second;
                sorted.push_back(std::make_pair(SS[j][i].first, b));
            }
        }

        SS[j] = sorted;
    }


    return;
}

long long arrival_time(long long Y)
{
    long long a = Y;
    for (int j = 1; j < _M; j++)
    {
        long long b = a + 1LL * (_S[j]-_S[j-1]) * _X;

        if (SS[j].size() > 0 && SS[j][0].first < a)
        {
            int l = 0, r = SS[j].size();
            while (l < r)
            {
                int m = (l + r + 1) / 2;
                if (m == SS[j].size())
                {
                    break;
                }
                else if (SS[j][m].first < a)
                {
                    l = m;
                }
                else
                {
                    r = m - 1;
                }
            }

            if (l < SS[j].size() && b < SS[j][l].second)
                b = SS[j][l].second;
        }
        a = b;
    }
    return a;
}

Compilation message (stderr)

overtaking.cpp: In function 'void sortVecPair(std::vector<long long int>&, std::vector<int>&)':
overtaking.cpp:28:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |     for (int i = 0; i < vecA.size(); i++)
      |                     ~~^~~~~~~~~~~~~
overtaking.cpp:39:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |     for (int i = 0; i < vecC.size(); i++)
      |                     ~~^~~~~~~~~~~~~
overtaking.cpp: In function 'void init(int, int, std::vector<long long int>, std::vector<int>, int, int, std::vector<int>)':
overtaking.cpp:68:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   68 |             for (int k = 0; k < SS[j].size(); k++)
      |                             ~~^~~~~~~~~~~~~~
overtaking.cpp:86:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   86 |         for (int i = 0; i < SS[j].size(); i++)
      |                         ~~^~~~~~~~~~~~~~
overtaking.cpp: In function 'long long int arrival_time(long long int)':
overtaking.cpp:115:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  115 |                 if (m == SS[j].size())
      |                     ~~^~~~~~~~~~~~~~~
overtaking.cpp:129:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  129 |             if (l < SS[j].size() && b < SS[j][l].second)
      |                 ~~^~~~~~~~~~~~~~

• Subtask 0: 0 / 0
• Subtask 1: 9 / 9
• Subtask 2: 10 / 10
• Subtask 3: 20 / 20
• Subtask 4: 26 / 26
• Subtask 5: 0 / 35