Submission #659144

#	Time	Username	Problem	Language	Result	Execution time	Memory
659144		activedeltorre	Strange Device (APIO19_strange_device)	C++14	25 / 100	2062 ms	156880 KiB

strange_device

#include <iostream>
#include <algorithm>
#include <vector>
#include <map>

using namespace std;
map<long long,long long>norm;
vector<pair<long long,long long> >vec[2000005];
vector<pair<long long,long long > >complete;
bool cmp(pair<long long,long long> a,pair<long long,long long>b)
{
    if(a.first!=b.first)
    {
        return a.first<b.first;
    }
        return a.second>b.second;
}
bool cmp2(pair<long long,long long> a,pair<long long,long long>b)
{
    if(a.first!=b.first)
    {
        return a.first<b.first;
    }
    if(a.second==-1)
    {
        return a.second>b.second;
    }
        return a.second<b.second;
}
int main()
{
    long long n,i,j,m,k,l,a,b,val1,val2,rest1,rest2,valoare,cnt=0,x,y,val3,val4,rest3,rest4,z;
    cin>>n>>a>>b;
    a=a/__gcd(a,b+1);
    for(i=1; i<=n; i++)
    {
        cin>>x>>y;
        val1=x/b;
        val2=y/b;
        rest1=x%b;
        rest2=y%b;
        if(val2-val1>=2)
        {
            val3=val1/a;
            val4=val2/a;
            if(val3==val4)
            {
                complete.push_back({(val1+1)%a,(val2-1)%a});
            }
            else if(val4==val3+1)
            {
                complete.push_back({(val1+1)%a,a-1});
                complete.push_back({0,(val2-1)%a});
            }
            else
            {
                complete.push_back({0,a-1});

            }
        }
        if(val1==val2)
        {
            valoare=(val1)%a;
            if(norm[valoare]==0)
            {
                cnt++;
                norm[valoare]=cnt;
            }
            vec[norm[valoare]].push_back({rest1,rest2});
            complete.push_back({valoare,-1});
        }
        else
        {
            ///adaug preim segmnt
            valoare=(val1)%a;
            if(norm[valoare]==0)
            {
                cnt++;
                norm[valoare]=cnt;
            }
            vec[norm[valoare]].push_back({rest1,b-1});
            complete.push_back({valoare,-1});
            ///adaug al doilea segmnt
            valoare=(val2)%a;
            if(norm[valoare]==0)
            {
                cnt++;
                norm[valoare]=cnt;
            }
            vec[norm[valoare]].push_back({0,rest2});
            complete.push_back({valoare,-1});
        }
    }
    sort(complete.begin(),complete.end(),cmp2);
    long long suma=0,nr,dr,index,maxim=-1,index2,lft,rgh;
    for(z=0; z<complete.size(); z++)
    {
        lft=complete[z].first;
        rgh=complete[z].second;
        if(rgh==-1 && (z==0 ||complete[z-1].first!=lft))
        {
            i=norm[lft];
            sort(vec[i].begin(),vec[i].end(),cmp);
            nr=vec[i].size();
            for(j=0; j<nr; j++)
            {
                index=j;
                dr=vec[i][j].second;
                while(index+1<nr && dr>=vec[i][index+1].first)
                {
                    dr=max(dr,vec[i][index+1].second);
                    index++;
                }
                suma=suma+dr-vec[i][j].first+1;
                j=index;
            }
        }
        else if(rgh!=-1)
        {
            index2=z;
            maxim=rgh;
            while(index2+1<complete.size() && maxim>=complete[index2+1].first)
            {
                maxim=max(maxim,complete[index2+1].second);
                index2++;
            }
            suma=suma+(maxim-lft+1)*(b);
            z=index2;
        }
    }
    cout<<suma;
    return 0;
}

Compilation message (stderr)

strange_device.cpp: In function 'int main()':
strange_device.cpp:96:15: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   96 |     for(z=0; z<complete.size(); z++)
      |              ~^~~~~~~~~~~~~~~~
strange_device.cpp:122:27: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  122 |             while(index2+1<complete.size() && maxim>=complete[index2+1].first)
      |                   ~~~~~~~~^~~~~~~~~~~~~~~~
strange_device.cpp:32:21: warning: unused variable 'm' [-Wunused-variable]
   32 |     long long n,i,j,m,k,l,a,b,val1,val2,rest1,rest2,valoare,cnt=0,x,y,val3,val4,rest3,rest4,z;
      |                     ^
strange_device.cpp:32:23: warning: unused variable 'k' [-Wunused-variable]
   32 |     long long n,i,j,m,k,l,a,b,val1,val2,rest1,rest2,valoare,cnt=0,x,y,val3,val4,rest3,rest4,z;
      |                       ^
strange_device.cpp:32:25: warning: unused variable 'l' [-Wunused-variable]
   32 |     long long n,i,j,m,k,l,a,b,val1,val2,rest1,rest2,valoare,cnt=0,x,y,val3,val4,rest3,rest4,z;
      |                         ^
strange_device.cpp:32:81: warning: unused variable 'rest3' [-Wunused-variable]
   32 |     long long n,i,j,m,k,l,a,b,val1,val2,rest1,rest2,valoare,cnt=0,x,y,val3,val4,rest3,rest4,z;
      |                                                                                 ^~~~~
strange_device.cpp:32:87: warning: unused variable 'rest4' [-Wunused-variable]
   32 |     long long n,i,j,m,k,l,a,b,val1,val2,rest1,rest2,valoare,cnt=0,x,y,val3,val4,rest3,rest4,z;
      |                                                                                       ^~~~~

• Subtask 1: 0 / 10
• Subtask 2: 5 / 5
• Subtask 3: 0 / 5
• Subtask 4: 0 / 5
• Subtask 5: 0 / 5
• Subtask 6: 0 / 20
• Subtask 7: 20 / 20
• Subtask 8: 0 / 30