Submission #1000385

#	Time	Username	Problem	Language	Result	Execution time	Memory
1000385		vjudge1	Exam (eJOI20_exam)	C++17	12 / 100	58 ms	3272 KiB

exam

#include <bits/stdc++.h>

using namespace std;

int main()
{
    int n;
    cin>>n;
    vector<int> vec1,vec2;
    for(int n1=n;n1>0;n1--)
    {
        int x;
        cin>>x;
        vec1.push_back(x);
    }
    for(int n1=n;n1>0;n1--)
    {
        int x;
        cin>>x;
        vec2.push_back(x);
    }
    if(n<=10)
    {
        int br=0;
        int ress=0;
        for(;br<1<<n;br++)
        {
            bool b[vec1.size()]={false};
            for(int i=0,br2=br;i<vec1.size();i++,br2=br2>>1)
            {
                if(br2&1==1)
                {
                    b[i]=true;
                }
            }
            int res=0;

            for(int i=0;i<vec1.size();i++)
            {

                if(b[i]==true)
                {
                    int maxx=vec1[i];
                    int j=i+1;
                    for(;j<vec1.size() && b[j]==true;j++)
                    {
                        maxx=max(maxx,vec1[j]);
                    }

                    j--;

                    for(int k=i;k<=j;k++)
                    {
                        if(vec2[k]==maxx)
                            res++;
                    }
                    i=j;


                }
                else
                {
                    if(vec1[i]==vec2[i])
                        res++;
                }
            }
            ress=max(ress,res);

        }
        cout<<ress;
    }
    else
    {
        int maxx=0,lastt=0,res=0;
        for(int i=0;i<vec1.size();i++)
        {
            maxx=max(maxx,vec1[i]);
            if(maxx>vec2[i])
            {
                maxx=0;
                lastt=i+1;
                continue;

            }
            if(maxx==vec2[i])
            {
                res=res+i-lastt+1;
                lastt=i+1;
            }
        }
        cout<<res;
    }

    return 0;
}

Compilation message (stderr)

exam.cpp: In function 'int main()':
exam.cpp:29:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |             for(int i=0,br2=br;i<vec1.size();i++,br2=br2>>1)
      |                                ~^~~~~~~~~~~~
exam.cpp:31:25: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]
   31 |                 if(br2&1==1)
      |                        ~^~~
exam.cpp:38:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   38 |             for(int i=0;i<vec1.size();i++)
      |                         ~^~~~~~~~~~~~
exam.cpp:45:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |                     for(;j<vec1.size() && b[j]==true;j++)
      |                          ~^~~~~~~~~~~~
exam.cpp:75:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   75 |         for(int i=0;i<vec1.size();i++)
      |                     ~^~~~~~~~~~~~

• Subtask 1: 0 / 14
• Subtask 2: 12 / 12
• Subtask 3: 0 / 13
• Subtask 4: 0 / 23
• Subtask 5: 0 / 16
• Subtask 6: 0 / 22