oj.uz

Submission #493343

# Submission time Handle Problem Language Result Execution time Memory
493343 2021-12-11T06:41:40 Z irmuun Chessboard (IZhO18_chessboard) C++17
16 / 100
 98 ms 3324 KB 
#include<bits/stdc++.h>
using namespace std;
#define pb push_back
#define ll long long
#define ff first
#define ss second
#define PI 3.14159265359
ll n,m,t,p,h,a,b,c,d,e,f,i,j,k,r,l,mod=1000000007,mod1=998244353,MAX=1e18,ans;
ll X1[100001],X2[100001],Y1[100001],Y2[100001];
string s,u;
ll df[101];
vector<pair<ll,ll> >v;
vector<ll>dv[101];
void dfs(ll x){
    df[x]=1;
    for(ll i=0;i<dv[x].size();i++){
        if(df[dv[x][i]]==0){
            dfs(dv[x][i]);
        }
    }
}
ll fastPow(ll a,ll b){
    ll d=1;
    while(b>0){
        if(b%2==1){
            d=d*a%mod;
        }
        b/=2;
        a=a*a%mod;
    }
    return d;
}
ll check(){
	ll c=n/i;
	ll b,w;
	if(c%2==0){
		b=n*n/2;
		w=b;
	}
	else{
		b=(n-c)*(n+c)/2;
		w=b+(c*c);
	}
	ll num[2]={0};
	for(ll i=1;i<=k;i++){
		num[((X1[i]-1)/c)+((Y1[i]-1)/c)]++;
	}
	return min((w-num[0])+num[1],(b-num[1])+num[0]);
}
int main(){
	cin>>n>>k;
	for(i=1;i<=k;i++){
		cin>>X1[i]>>Y1[i]>>X2[i]>>Y2[i];
	}
	if(k==0){
		ans=n*n/2;
		for(i=1;i<n;i++){
			if(n%i==0&&n/i%2==1){
				d=n*n-(i*i);
				ans=min(ans,d/2);
			}
		}
		cout<<ans;
		return 0;
	}
	p=0;
	for(i=2;i<=sqrt(n);i++){
		if(n%i==0){
			p=1;
			break;
		}
	}
	if(p==0){
		d=n*n/2;
		if(n==2){
			e=d;
		}
		else{
			e=d+1;
		}
		r=0;
		l=0;
		for(i=1;i<=k;i++){
			if((X1[i]+Y1[i])%2==0){
				r++;
			}
			else{
				l++;
			}
		}
		cout<<min((e-r)+l,(d-l)+r);
		return 0;
	}
	ans=n*n;
	for(i=1;i<n;i++){
		if(n%i==0){
			ans=min(ans,check());
		}
	}
	cout<<ans;
}

Compilation message

chessboard.cpp: In function 'void dfs(long long int)':
chessboard.cpp:16:17: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |     for(ll i=0;i<dv[x].size();i++){
      |                ~^~~~~~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 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 1 ms 300 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 1 ms 300 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 64 ms 2336 KB Output is correct
2 Correct 17 ms 864 KB Output is correct
3 Correct 43 ms 1596 KB Output is correct
4 Correct 41 ms 1812 KB Output is correct
5 Correct 59 ms 2116 KB Output is correct
6 Correct 35 ms 1456 KB Output is correct
7 Correct 8 ms 588 KB Output is correct
8 Correct 42 ms 1484 KB Output is correct
9 Correct 98 ms 3324 KB Output is correct
10 Correct 54 ms 2000 KB Output is correct

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 460 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -

Subtask #4
0 / 16.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 460 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 64 ms 2336 KB Output is correct
2 Correct 17 ms 864 KB Output is correct
3 Correct 43 ms 1596 KB Output is correct
4 Correct 41 ms 1812 KB Output is correct
5 Correct 59 ms 2116 KB Output is correct
6 Correct 35 ms 1456 KB Output is correct
7 Correct 8 ms 588 KB Output is correct
8 Correct 42 ms 1484 KB Output is correct
9 Correct 98 ms 3324 KB Output is correct
10 Correct 54 ms 2000 KB Output is correct
11 Runtime error 1 ms 460 KB Execution killed with signal 6
12 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 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 1 ms 300 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 1 ms 300 KB Output is correct
9 Correct 64 ms 2336 KB Output is correct
10 Correct 17 ms 864 KB Output is correct
11 Correct 43 ms 1596 KB Output is correct
12 Correct 41 ms 1812 KB Output is correct
13 Correct 59 ms 2116 KB Output is correct
14 Correct 35 ms 1456 KB Output is correct
15 Correct 8 ms 588 KB Output is correct
16 Correct 42 ms 1484 KB Output is correct
17 Correct 98 ms 3324 KB Output is correct
18 Correct 54 ms 2000 KB Output is correct
19 Runtime error 1 ms 460 KB Execution killed with signal 6
20 Halted 0 ms 0 KB -