oj.uz

Submission #500490

# Submission time Handle Problem Language Result Execution time Memory
500490 2021-12-31T07:41:45 Z dostigator Chessboard (IZhO18_chessboard) C++17
16 / 100
 28 ms 1080 KB 
// author lox:(
#pragma GCC optimize("O3")
#pragma GCC target("popcnt")
#include <bits/stdc++.h>
using namespace std;
#define IZhO_SILVER ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define popcnt __builtin_popcount
#define all(a) a.begin(),a.end()
#define low_b lower_bound
#define up_b upper_bound
#define vii vector<pair<ll,ll>>
#define vll vector<pair<ll,ll>>
#define pii pair<ll,ll>
#define mii map<ll,ll>
#define pll pair<ll,ll>
#define mll map<ll,ll>
#define vi vector<ll>
#define vl vector<ll>
#define pb push_back
#define endl '\n'
#define Y second
#define X first
typedef long double ld;
typedef long long ll;
const long long dx[4]={1,-1,0,0},dy[4]={0,0,1,-1},col=107,N=1e6+777;
const ll mod=1e9+7,inf=1e18;
void fre_open(){freopen("file.in","r",stdin);freopen("file.out","w",stdout);}
ll binpow(ll n,ll k){if(k<0)return 0ll;if(k==0)return 1ll;if(k%2)return (binpow(n,k-1)*n)%mod;ll kk=binpow(n,k/2)%mod;return (kk*kk)%mod;}
ll n,k;
pll gg[N];
void solve(){
    cin>>n>>k;
    if(k==0){
        ll x=n*n/2;
        for(ll i=n/2; i>=1; --i)if(n%i==0)x=min(x,i*i*((n/i)*(n/i)/2));
        cout<<x;
        return;
    }
    ll x=n*n/2;
	ll x2=x+1;
	for(ll c=0, i1,i2,j1,j2;c<k; ++c){
		cin>>i1>>j1>>i2>>j2;
		for(ll i=i1; i<=i2; ++i)
			for(ll j=j1; j<=j2; ++j)
			{
				if(i%2==j%2) x++,x2--;
				if(i%2!=j%2) x2++,x--;
			}
	}
	cout<<min(x,x2);
	return;
    /*if(n<=1e5){
        for(ll i=1; i<=k; ++i){
            ll x,y,tox,toy;
            cin>>x>>y>>tox>>toy;
            gg[i]={x,y};
        }
        ll ans=mod-10;
        for(ll d=1; d*d<=n; ++d){
            if(n%d!=0) continue;
            ll m=n/d;
            ll res=(d*d)*((m*m)/2),res2;
            res2=res+((m%2)*(d*d));
            for(ll i=1; i<=k; ++i){
                ll x,y;
                tie(x,y)=gg[i];
                x=(x+(d-1))/d;
                y=(y+(d-1))/d;
                if((x+y)%2==0){
                    res2--;
                    res++;
                }
                if((x+y)%2==1){
                    res--;
                    res2++;
                }
            }
            ans=min({ans,res,res2});
            m=n/(n/d);
            res=((n/d)*(n/d))*((m*m)/2);
            res2=res+(((m%2)*((n/d)*(n/d))));
            for(ll i=1; i<=k; ++i){
                ll x,y;
                tie(x,y)=gg[i];
                x=(x+((n/d)-1))/(n/d);
                y=(y+((n/d)-1))/(n/d);
                if((x+y)%2==0){
                    res2--;
                    res++;
                }
                if((x+y)%2==1){
                    res--;
                    res2++;
                }
            }
            if(d==1){
                ans=min(ans,max(res,res2));
                continue;
            }
            ans=min({ans,res,res2});
        }
        cout<<ans<<endl;
        return;
    }
    ll x=n*n/2;
	ll x2=x+1;
	for(ll c=0, i1,i2,j1,j2;c<k; ++c){
		cin>>i1>>j1>>i2>>j2;
		for(ll i=i1; i<=i2; ++i)
			for(ll j=j1; j<=j2; ++j)
			{
				if(i%2==j%2) x++,x2--;
				if(i%2!=j%2) x2++,x--;
			}
	}
	cout<<min(x,x2);
	return;*/
}
/*
6 8
3 3 3 3
1 2 1 2
3 4 3 4
5 5 5 5
4 3 4 3
4 4 4 4
2 1 2 1
3 6 3 6*/
int main() {
    //fre_open();
    IZhO_SILVER;
    ll tt=1;
    //cin>>tt;
    while(tt--) solve();
}

Compilation message

chessboard.cpp: In function 'void fre_open()':
chessboard.cpp:27:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   27 | void fre_open(){freopen("file.in","r",stdin);freopen("file.out","w",stdout);}
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
chessboard.cpp:27:53: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   27 | void fre_open(){freopen("file.in","r",stdin);freopen("file.out","w",stdout);}
      |                                              ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 204 KB Output is correct
2 Correct 7 ms 676 KB Output is correct
3 Correct 15 ms 588 KB Output is correct
4 Correct 13 ms 580 KB Output is correct
5 Correct 16 ms 584 KB Output is correct
6 Correct 11 ms 580 KB Output is correct
7 Correct 3 ms 408 KB Output is correct
8 Correct 13 ms 588 KB Output is correct
9 Correct 28 ms 592 KB Output is correct
10 Correct 15 ms 1080 KB Output is correct

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 204 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 16.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 204 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 204 KB Output is correct
2 Correct 7 ms 676 KB Output is correct
3 Correct 15 ms 588 KB Output is correct
4 Correct 13 ms 580 KB Output is correct
5 Correct 16 ms 584 KB Output is correct
6 Correct 11 ms 580 KB Output is correct
7 Correct 3 ms 408 KB Output is correct
8 Correct 13 ms 588 KB Output is correct
9 Correct 28 ms 592 KB Output is correct
10 Correct 15 ms 1080 KB Output is correct
11 Incorrect 0 ms 204 KB Output isn't correct
12 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 21 ms 204 KB Output is correct
10 Correct 7 ms 676 KB Output is correct
11 Correct 15 ms 588 KB Output is correct
12 Correct 13 ms 580 KB Output is correct
13 Correct 16 ms 584 KB Output is correct
14 Correct 11 ms 580 KB Output is correct
15 Correct 3 ms 408 KB Output is correct
16 Correct 13 ms 588 KB Output is correct
17 Correct 28 ms 592 KB Output is correct
18 Correct 15 ms 1080 KB Output is correct
19 Incorrect 0 ms 204 KB Output isn't correct
20 Halted 0 ms 0 KB -