Submission #819318

#	Time	Username	Problem	Language	Result	Execution time	Memory
819318		tset	Olympic Bus (JOI20_ho_t4)	C++14	0 / 100	1 ms	436 KiB

ho_t4

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


signed main()
{
    int N, M;
    scanf("%lld%lld", &N, &M);
    vector<int> Ai(N), Bi(N);
    for(int ai = 0; ai < N; ai++)
    {
        scanf("%lld", &Ai[ai]);
    }
    for(int bi = 0; bi< N; bi++)
    {
        scanf("%lld", &Bi[bi]);
    }
    vector<int> famille1;
    vector<pair<int, int>> famille2;

    for(int iN = 0; iN < N; iN++)
    {
        if(Bi[iN] >= Ai[iN])
        {
            famille1.push_back(Bi[iN]);
        }
        else
        {
            famille2.push_back({Ai[iN], Bi[iN]});
        }
    }
    int pas = 1LL<<50LL;
    int pos = 0;
    while(pas > 0)
    {
        int moyenneMin = pos + pas;
        int nbCoursesReq = 0;
        for(int iC : famille1)
        {
            nbCoursesReq += moyenneMin/iC;
            if(moyenneMin%iC != 0)
            {
                nbCoursesReq++;
            }
        }
        for(pair<int, int> iC : famille2 )
        {
            int moyenneA = iC.first * M;
            if(moyenneA >= moyenneMin)
            {
                nbCoursesReq += moyenneMin/iC.first;
                if(moyenneMin%iC.first != 0)
                {
                    nbCoursesReq++;
                }
            }
            else
            {
                nbCoursesReq += M;
                int nouvMoyenne =  moyenneMin - moyenneA;
                nbCoursesReq += nouvMoyenne/iC.second;
                if(nouvMoyenne%iC.second != 0)
                {
                    nbCoursesReq++;
                }
            }
        }
        if(nbCoursesReq <= M * N)
        {
            pos += pas;
        }
        pas/= 2;
    }
    printf("%lld\n", pos);
}

Compilation message (stderr)

ho_t4.cpp: In function 'int main()':
ho_t4.cpp:9:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    9 |     scanf("%lld%lld", &N, &M);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~
ho_t4.cpp:13:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |         scanf("%lld", &Ai[ai]);
      |         ~~~~~^~~~~~~~~~~~~~~~~
ho_t4.cpp:17:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |         scanf("%lld", &Bi[bi]);
      |         ~~~~~^~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 11
• Subtask 3: 0 / 21
• Subtask 4: 0 / 63