Submission #340278

#	Time	Username	Problem	Language	Result	Execution time	Memory
340278		scales	Chessboard (IZhO18_chessboard)	C++17	39 / 100	80 ms	1900 KiB

chessboard

#include <bits/stdc++.h>
/*#ifndef LOCAL_RUN
    #pragma GCC optimize("Ofast")
    #pragma GCC optimize("unroll-loops")
    #pragma GCC optimize("fast-math")
    #pragma GCC target("avx2,tune=native")
#endif*/
using namespace std;
int main()
{
      ios::sync_with_stdio(false);
      cin.tie(0);
     // freopen("input.txt","r",stdin);
     // freopen("output.txt","w",stdout);
     long long t,i,j,dno,x,y,z,w,m,k,n,x1,tip,g,p,l,r,sum,maxi,kol,v,f,s;
     cin>>n;
     cin>>k;
     z=0;
     maxi=1000000000;
     vector<long long> a(k),b(k);
     for(i=0;i<k;i++)
     {
         cin>>a[i];
         cin>>b[i];
         cin>>x;
         cin>>y;
         a[i]--;
         b[i]--;
     }
     vector<long long> viv;
     for(i=2;i<n;i++)
     {
         if(n%i==0)
         {
             viv.push_back(i);
         }
     }
     viv.push_back(1);
     x=viv.size();
        for(i=0;i<x;i++)
        {
             kol=0;
             w=viv[i];
             //cout<<"w="<<w<<endl;
             for(j=0;j<k;j++)
             {
                 //cout<<"a="<<a[j]<<" b="<<b[j]<<" "<<a[j]%(2*w)<<" "<<b[j]%(2*w)<<endl;
                 if( ((a[j]%(2*w)<w) && (b[j]%(2*w)>=w)) ||((a[j]%(2*w)>=w) && (b[j]%(2*w)<w)))
                 {
                     kol++;
                 }
             }
             v=(n*n)/(w*w);
             if(v%2==0)
             {
                 f=n*n/2;
                 s=n*n/2;
             }
             else
             {
                 s=(n*n-w*w)/2;
                 f=n*n-s;
             }
             kol=k-kol;
             //cout<<"kol="<<kol<<" f="<<f<<" s="<<s<<" maxi=";
             maxi=min({maxi,(f-kol+k-kol),(kol+s-k+kol)});
             //cout<<maxi<<endl;
        }
        cout<<maxi<<endl;


    return 0;
}

Compilation message (stderr)

chessboard.cpp: In function 'int main()':
chessboard.cpp:15:16: warning: unused variable 't' [-Wunused-variable]
   15 |      long long t,i,j,dno,x,y,z,w,m,k,n,x1,tip,g,p,l,r,sum,maxi,kol,v,f,s;
      |                ^
chessboard.cpp:15:22: warning: unused variable 'dno' [-Wunused-variable]
   15 |      long long t,i,j,dno,x,y,z,w,m,k,n,x1,tip,g,p,l,r,sum,maxi,kol,v,f,s;
      |                      ^~~
chessboard.cpp:15:30: warning: variable 'z' set but not used [-Wunused-but-set-variable]
   15 |      long long t,i,j,dno,x,y,z,w,m,k,n,x1,tip,g,p,l,r,sum,maxi,kol,v,f,s;
      |                              ^
chessboard.cpp:15:34: warning: unused variable 'm' [-Wunused-variable]
   15 |      long long t,i,j,dno,x,y,z,w,m,k,n,x1,tip,g,p,l,r,sum,maxi,kol,v,f,s;
      |                                  ^
chessboard.cpp:15:40: warning: unused variable 'x1' [-Wunused-variable]
   15 |      long long t,i,j,dno,x,y,z,w,m,k,n,x1,tip,g,p,l,r,sum,maxi,kol,v,f,s;
      |                                        ^~
chessboard.cpp:15:43: warning: unused variable 'tip' [-Wunused-variable]
   15 |      long long t,i,j,dno,x,y,z,w,m,k,n,x1,tip,g,p,l,r,sum,maxi,kol,v,f,s;
      |                                           ^~~
chessboard.cpp:15:47: warning: unused variable 'g' [-Wunused-variable]
   15 |      long long t,i,j,dno,x,y,z,w,m,k,n,x1,tip,g,p,l,r,sum,maxi,kol,v,f,s;
      |                                               ^
chessboard.cpp:15:49: warning: unused variable 'p' [-Wunused-variable]
   15 |      long long t,i,j,dno,x,y,z,w,m,k,n,x1,tip,g,p,l,r,sum,maxi,kol,v,f,s;
      |                                                 ^
chessboard.cpp:15:51: warning: unused variable 'l' [-Wunused-variable]
   15 |      long long t,i,j,dno,x,y,z,w,m,k,n,x1,tip,g,p,l,r,sum,maxi,kol,v,f,s;
      |                                                   ^
chessboard.cpp:15:53: warning: unused variable 'r' [-Wunused-variable]
   15 |      long long t,i,j,dno,x,y,z,w,m,k,n,x1,tip,g,p,l,r,sum,maxi,kol,v,f,s;
      |                                                     ^
chessboard.cpp:15:55: warning: unused variable 'sum' [-Wunused-variable]
   15 |      long long t,i,j,dno,x,y,z,w,m,k,n,x1,tip,g,p,l,r,sum,maxi,kol,v,f,s;
      |                                                       ^~~

• Subtask 1: 8 / 8
• Subtask 2: 0 / 8
• Subtask 3: 15 / 15
• Subtask 4: 16 / 16
• Subtask 5: 0 / 23
• Subtask 6: 0 / 30