oj.uz

Submission #89443

# Submission time Handle Problem Language Result Execution time Memory
89443 2018-12-14T15:04:46 Z Harvey_Rollens Chessboard (IZhO18_chessboard) C++17
31 / 100
 143 ms 3632 KB 
#include<bits/stdc++.h>
#define ll long long
#define st string
#define fr first
#define se second

const long long mod=1e9+7;

using namespace std;

vector<pair<ll, ll> > v;
ll a[100100], b[100100], k, ans=1000000100;

void f(ll x)
{
    for(ll i=1; i*i<=x; i++)
    {
        if(x%i==0)
        {
            v.push_back({i, x/i});
            if(i>1) v.push_back({x/i, i});
        }
    }
}

void pro(ll p, ll o)
{
    ll kb1=0, kb2=0;
    for(ll i=1; i<=k; i++)
    {
        ll x=a[i], y=b[i];

        x=(x+p-1)/p;
        y=(y+p-1)/p;

        if((x%2!=0 && y%2!=0) || (x%2==0 && y%2==0))
        {
            kb1++;
        }
        else kb2++;
    }

    //cout<<"kb1="<<kb1<<" kb2="<<kb2<<endl;

    kb2=kb2+((o*o)/2+(o*o)%2)*p*p-(k-kb2);
    kb1=kb1+((o*o)/2)*p*p-(k-kb1);

    //cout<<"PPP= "<<kb1<<" "<<kb2<<" "<<p<<" "<<o<<'\n';

    ans=min(kb1, min(ans, kb2));
}

main()
{
    //freopen("1.txt", "r", stdin);
    //freopen("1.txt", "w", stdout);
    ios_base::sync_with_stdio(0);
    cin.tie(NULL);
    cout.tie(NULL);

    ll n;
    cin>>n>>k;

    if(!k)
    {
        cout<<(n*n)/2;
        return 0;
    }
    f(n);

    for(ll i=1; i<=k; i++)
        cin>>a[i]>>b[i]>>a[i]>>b[i];

    for(ll i=0; i<v.size(); i++)
    {
        pro(v[i].fr, v[i].se);
    }

    cout<<ans;
    return 0;
}
/*
*/

Compilation message

chessboard.cpp:53:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main()
      ^
chessboard.cpp: In function 'int main()':
chessboard.cpp:74:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(ll i=0; i<v.size(); i++)
                 ~^~~~~~~~~

Subtask #1
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Incorrect 2 ms 384 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 29 ms 2924 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2924 KB Output is correct
2 Correct 2 ms 2924 KB Output is correct
3 Correct 2 ms 2924 KB Output is correct
4 Correct 3 ms 2924 KB Output is correct
5 Correct 5 ms 2924 KB Output is correct
6 Correct 2 ms 2924 KB Output is correct
7 Correct 2 ms 2924 KB Output is correct
8 Correct 2 ms 2924 KB Output is correct
9 Correct 2 ms 2924 KB Output is correct
10 Correct 2 ms 2924 KB Output is correct
11 Correct 2 ms 2924 KB Output is correct
12 Correct 2 ms 2924 KB Output is correct
13 Correct 3 ms 2924 KB Output is correct
14 Correct 3 ms 2924 KB Output is correct
15 Correct 2 ms 2924 KB Output is correct

Subtask #4
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2924 KB Output is correct
2 Correct 2 ms 2924 KB Output is correct
3 Correct 2 ms 2924 KB Output is correct
4 Correct 3 ms 2924 KB Output is correct
5 Correct 5 ms 2924 KB Output is correct
6 Correct 2 ms 2924 KB Output is correct
7 Correct 2 ms 2924 KB Output is correct
8 Correct 2 ms 2924 KB Output is correct
9 Correct 2 ms 2924 KB Output is correct
10 Correct 2 ms 2924 KB Output is correct
11 Correct 2 ms 2924 KB Output is correct
12 Correct 2 ms 2924 KB Output is correct
13 Correct 3 ms 2924 KB Output is correct
14 Correct 3 ms 2924 KB Output is correct
15 Correct 2 ms 2924 KB Output is correct
16 Correct 15 ms 2924 KB Output is correct
17 Correct 33 ms 3376 KB Output is correct
18 Correct 47 ms 3632 KB Output is correct
19 Correct 127 ms 3632 KB Output is correct
20 Correct 143 ms 3632 KB Output is correct
21 Correct 33 ms 3632 KB Output is correct
22 Correct 3 ms 3632 KB Output is correct
23 Correct 28 ms 3632 KB Output is correct
24 Correct 44 ms 3632 KB Output is correct
25 Correct 8 ms 3632 KB Output is correct
26 Correct 27 ms 3632 KB Output is correct
27 Correct 38 ms 3632 KB Output is correct
28 Correct 42 ms 3632 KB Output is correct
29 Correct 14 ms 3632 KB Output is correct
30 Correct 3 ms 3632 KB Output is correct

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 29 ms 2924 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Incorrect 2 ms 384 KB Output isn't correct
3 Halted 0 ms 0 KB -