oj.uz

Submission #137921

# Submission time Handle Problem Language Result Execution time Memory
137921 2019-07-28T14:07:16 Z vardan__02 Chessboard (IZhO18_chessboard) C++14
16 / 100
 43 ms 2780 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;
    ans1=p1*p1/2+1;
    ans1=ans1*q1*q1;
    ans1=ans1-u+v;
    ans2=p1*p1/2;
    ans2=ans2*q1*q1;
    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;
    ans1=p2*p2/2+1;
    ans1=ans1*q2*q2;
    ans1=ans1-u+v;
    ans2=p2*p2/2;
    ans2=ans2*q2*q2;
    ans2=ans2-v+u;
    ans=min(ans,ans1);
    ans=min(ans,ans2);
    cout<<ans<<endl;
    return 0;
}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1144 KB Output is correct
2 Correct 3 ms 1144 KB Output is correct
3 Correct 3 ms 1144 KB Output is correct
4 Correct 3 ms 1144 KB Output is correct
5 Correct 3 ms 1144 KB Output is correct
6 Correct 3 ms 1144 KB Output is correct
7 Correct 4 ms 1144 KB Output is correct
8 Correct 4 ms 1144 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 31 ms 2476 KB Output is correct
2 Correct 11 ms 1656 KB Output is correct
3 Correct 20 ms 2040 KB Output is correct
4 Correct 22 ms 2184 KB Output is correct
5 Correct 27 ms 2172 KB Output is correct
6 Correct 18 ms 1912 KB Output is correct
7 Correct 8 ms 1400 KB Output is correct
8 Correct 19 ms 1912 KB Output is correct
9 Correct 43 ms 2780 KB Output is correct
10 Correct 26 ms 2112 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 2476 KB Output is correct
2 Correct 11 ms 1656 KB Output is correct
3 Correct 20 ms 2040 KB Output is correct
4 Correct 22 ms 2184 KB Output is correct
5 Correct 27 ms 2172 KB Output is correct
6 Correct 18 ms 1912 KB Output is correct
7 Correct 8 ms 1400 KB Output is correct
8 Correct 19 ms 1912 KB Output is correct
9 Correct 43 ms 2780 KB Output is correct
10 Correct 26 ms 2112 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 Correct 3 ms 1144 KB Output is correct
3 Correct 3 ms 1144 KB Output is correct
4 Correct 3 ms 1144 KB Output is correct
5 Correct 3 ms 1144 KB Output is correct
6 Correct 3 ms 1144 KB Output is correct
7 Correct 4 ms 1144 KB Output is correct
8 Correct 4 ms 1144 KB Output is correct
9 Correct 31 ms 2476 KB Output is correct
10 Correct 11 ms 1656 KB Output is correct
11 Correct 20 ms 2040 KB Output is correct
12 Correct 22 ms 2184 KB Output is correct
13 Correct 27 ms 2172 KB Output is correct
14 Correct 18 ms 1912 KB Output is correct
15 Correct 8 ms 1400 KB Output is correct
16 Correct 19 ms 1912 KB Output is correct
17 Correct 43 ms 2780 KB Output is correct
18 Correct 26 ms 2112 KB Output is correct
19 Incorrect 4 ms 1144 KB Output isn't correct
20 Halted 0 ms 0 KB -