oj.uz

Submission #137901

# Submission time Handle Problem Language Result Execution time Memory
137901 2019-07-28T13:36:32 Z vardan__02 Chessboard (IZhO18_chessboard) C++14
8 / 100
 43 ms 3320 KB 
#include <iostream>
#include <fstream>
#include <algorithm>
#include <cstring>
#include <string>
#include <vector>
#include <cstdio>
#include <queue>
#include <deque>
#include <stack>
#include <cmath>
#include <list>
#include <set>
#include <map>
using namespace std;
typedef long long ll;
#define MP make_pair
#define PB push_back
ll n,k,p,u,ans,color[100005],i,j,qanak[105],v,x[100005],y[100005],p1,p2,q1,q2,ans1,ans2;
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    for(i=2;i<=100000;i++)
    {
        if(!color[i])
        {
            for(j=2*i;j<=100000;j+=i)
                color[j]=1;
        }
    }
    cin>>n>>k;
    if(color[n]==0)
    {
        for(i=1;i<=k;i++)
        {
            cin>>x[i]>>y[i]>>x[i]>>y[i];
            if(x[i]%2==y[i]%2)
                u++;
            else
                v++;
        }
        p=n*n/2+1-u+v;
        ans=n*n/2-v+u;
        cout<<min(ans,p)<<endl;
        return 0;
    }
    for(i=n;i>=2;i--)
    {
        if(!color[i] && n%i==0)
        {
            p2=i;
            break;
        }
    }
    for(i=2;i<=n;i++)
    {
        if(!color[i] && n%i==0)
        {
            p1=i;
            break;
        }
    }
    for(i=1;i<=k;i++)
    cin>>x[i]>>y[i]>>x[i]>>y[i];
    for(i=1;i<=k;i++)
    {
        ll g,h;
        if(x[i]%p1==0)
            g=x[i]/p1;
        else
            g=x[i]/p1+1;
        if(y[i]%p1==0)
            h=y[i]/p1;
        else
            h=y[i]/p1+1;
        if(h%2==g%2)
            u++;
        else
            v++;
    }
    q1=n/p1;
    if(q1%2==1)
    ans1=q1*q1/2+1;
    else
    ans1=q1*q1/2;
    ans1=ans1*p1*p1;
    ans1=ans1-u+v;
    ans2=q1*q1/2;
    ans2=ans2*p1*p1;
    ans2=ans2-v+u;
    ans=min(ans1,ans2);
    u=0; v=0;
    for(i=1;i<=k;i++)
    {
        ll g,h;
        if(x[i]%p2==0)
            g=x[i]/p2;
        else
            g=x[i]/p2+1;
        if(y[i]%p2==0)
            h=y[i]/p2;
        else
            h=y[i]/p2+1;
        if(h%2==g%2)
            u++;
        else
            v++;
    }
    q2=n/p2;
    if(q2%2==1)
    ans1=q2*q2/2+1;
    else
    ans1=q2*q2/2;
    ans1=ans1*p2*p2;
    ans1=ans1-u+v;
    ans2=q2*q2/2;
    ans2=ans2*p2*p2;
    ans2=ans2-v+u;
    ans=min(ans,ans1);
    ans=min(ans,ans2);
    cout<<ans<<endl;
    return 0;
}

Subtask #1
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1144 KB Output is correct
2 Incorrect 3 ms 1144 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 31 ms 2680 KB Output is correct
2 Correct 11 ms 1784 KB Output is correct
3 Correct 21 ms 2736 KB Output is correct
4 Correct 23 ms 2808 KB Output is correct
5 Correct 28 ms 2936 KB Output is correct
6 Correct 20 ms 2424 KB Output is correct
7 Correct 7 ms 1400 KB Output is correct
8 Correct 19 ms 2424 KB Output is correct
9 Correct 43 ms 3320 KB Output is correct
10 Correct 26 ms 2808 KB Output is correct

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 1144 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 16.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 1144 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 31 ms 2680 KB Output is correct
2 Correct 11 ms 1784 KB Output is correct
3 Correct 21 ms 2736 KB Output is correct
4 Correct 23 ms 2808 KB Output is correct
5 Correct 28 ms 2936 KB Output is correct
6 Correct 20 ms 2424 KB Output is correct
7 Correct 7 ms 1400 KB Output is correct
8 Correct 19 ms 2424 KB Output is correct
9 Correct 43 ms 3320 KB Output is correct
10 Correct 26 ms 2808 KB Output is correct
11 Incorrect 4 ms 1144 KB Output isn't correct
12 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1144 KB Output is correct
2 Incorrect 3 ms 1144 KB Output isn't correct
3 Halted 0 ms 0 KB -