oj.uz

Submission #167772

# Submission time Handle Problem Language Result Execution time Memory
167772 2019-12-10T06:03:24 Z abil Chessboard (IZhO18_chessboard) C++14
0 / 100
 38 ms 3832 KB 
#include <bits/stdc++.h>

#define fr first
#define sc second
#define pb push_back
#define mk make_pair
#define all(s) s.begin(),s.end()
#define int long long

using namespace std;

const int N = (1e5 + 12);
const int mod = (1e9 + 7);
const int INF = (0x3f3f3f3f);

int ans = 1e9;
int n, k, x[2][N], y[2][N];

void calc(int div){
	int bl = n / div, cnt = 0, x1, y1;
	if(bl & 1){
		cnt += div * div * ((bl + 1) / 2) * ((bl + 1) / 2);
		cnt += div * div * (bl / 2) * (bl / 2);
		for(int i = 1;i <= k; i++){
			x1 = x[0][i];
			y1 = y[0][i];
			x1 = (x1 + bl - 1) / bl;
			y1 = (y1 + bl - 1) / bl;
			if((x1 + y1) % 2 == 1){
				cnt++;
			}
			else{
				cnt--;
			}
		}
		ans = min(ans, cnt);
		cnt = 0;
		cnt += div * div * ((bl + 1) / 2) * ((bl + 1) / 2);
		cnt += div * div * (bl / 2) * (bl / 2);
		for(int i = 1;i <= k; i++){
			x1 = x[0][i];
			y1 = y[0][i];
			x1 = (x1 + bl - 1) / bl;
			y1 = (y1 + bl - 1) / bl;
			if((x1 + y1) % 2 == 0){
				cnt++;
			}
			else{
				cnt--;
			}
		}
		ans = min(ans, cnt);
	}
	else{
		cnt += div * div * (bl / 2) * bl;
		for(int i = 1;i <= k; i++){
			x1 = x[0][i];
			y1 = y[0][i];
			x1 = (x1 + bl - 1) / bl;
			y1 = (y1 + bl - 1) / bl;
			if((x1 + y1) % 2 == 1){
				cnt++;
			}
			else{
				cnt--;
			}
		}
		ans = min(ans, cnt);
		cnt = 0;
		cnt += div * div * (bl / 2) * bl;
		for(int i = 1;i <= k; i++){
			x1 = x[0][i];
			y1 = y[0][i];
			x1 = (x1 + bl - 1) / bl;
			y1 = (y1 + bl - 1) / bl;
			if((x1 + y1) % 2 == 0){
				cnt++;
			}
			else{
				cnt--;
			}
		}
		ans = min(ans, cnt);
	}
}
main()
{
	cin >> n >> k;
	for(int i = 1;i <= k; i++){
		scanf("%lld%lld%lld%lld", &x[0][i], &y[0][i], &x[1][i], &y[1][i]);
	}
	for(int i = 1;i * i <= n; i++){
		if(n % i == 0){
			calc(i);
			calc(n / i);
		}
	}
	cout << ans;
}

Compilation message

chessboard.cpp:86:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main()
      ^
chessboard.cpp: In function 'int main()':
chessboard.cpp:90:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld%lld%lld%lld", &x[0][i], &y[0][i], &x[1][i], &y[1][i]);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Incorrect 2 ms 256 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 38 ms 3832 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 380 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 380 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 38 ms 3832 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 256 KB Output is correct
2 Incorrect 2 ms 256 KB Output isn't correct
3 Halted 0 ms 0 KB -