oj.uz

Submission #151520

# Submission time Handle Problem Language Result Execution time Memory
151520 2019-09-03T13:34:46 Z nvmdava Chessboard (IZhO18_chessboard) C++17
0 / 100
 35 ms 1784 KB 
#include <bits/stdc++.h>
using namespace std;
#define N 200002
#define ff first
#define ss second
#define ll long long

vector<ll> di;

ll dif[200005], res = 0x3f3f3f3f3f3f3f3f;

inline ll get(ll x, ll d){
	return x / (2 * d) * d + min(d, x % (2 * d));
}

int main(){
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);

	mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

	ll n, k, x1, x2, y1, y2, ex, ey, ox, oy;
	cin>>n>>k;
	for(int i = 1; i * i <= n; i++)
		if(n % i == 0){
			di.push_back(i);
			if(i * i != n)
				di.push_back(n / i);
		}
	
	
	for(int i = 0; i < di.size(); i++)
		dif[i] = n * n - n * n / (di[i] * di[i]) / 2 * (di[i] * di[i]);
	
	while(k--){
		cin>>x1>>y1>>x2>>y2;
		for(int i = 0; i < di.size(); i++){
			ex = get(x2, di[i]) - get(x1 - 1, di[i]);
			ox = x2 - x1 + 1 - ex;
			ey = get(y2, di[i]) - get(y1 - 1, di[i]);
			oy = y2 - y1 + 1 - ey;
			dif[i] -= ex * ey + ox * oy;
			dif[i] += ex * oy + ey * ox;
		}
	}

	for(int i = 0; i < di.size(); i++)
		res = min(res, min(dif[i], n * n - dif[i]));
	
	cout<<res;
}

Compilation message

chessboard.cpp: In function 'int main()':
chessboard.cpp:33:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0; i < di.size(); i++)
                 ~~^~~~~~~~~~~
chessboard.cpp:38:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = 0; i < di.size(); i++){
                  ~~^~~~~~~~~~~
chessboard.cpp:48:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0; i < di.size(); i++)
                 ~~^~~~~~~~~~~

Subtask #1
0 / 8.0

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

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 35 ms 1784 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

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

Subtask #4
0 / 16.0

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

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 35 ms 1784 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

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