#include <bits/stdc++.h>
using namespace std;
typedef pair<int64_t,int64_t> ii;
int64_t n,k,odd,even,res=1e12;
vector<ii> g1[100005],g2[100005];
void ReadInt(int64_t &number)
{
number=0;
int64_t c=getchar();
while(c<'0'||c>'9')
c=getchar();
for(;('0'<=c&&c<='9');c=getchar())
number=number*10+c-48;
}
int64_t Cal(int64_t u,int64_t v,int64_t block)
{
return ((u-1)/block+1+(v-1)/block+1)%2;
}
void Update(int64_t i,int64_t l,int64_t r,int64_t block,int64_t val)
{
int64_t ll=(l-1)/block+2;
int64_t rr=(r-1)/block;
if(ll==rr+2)
{
if(Cal(i,l,block)==1)
odd+=(r-l+1)*val;
else
even+=(r-l+1)*val;
return;
}
odd+=(rr-ll+1)/2*block*val;
even+=(rr-ll+1)/2*block*val;
if((rr-ll+1)%2==1)
{
if(Cal(i,(l-1)*block+1,block)==1)
odd+=block*val;
else
even+=block*val;
}
if(Cal(i,l,block)==1)
odd+=((ll-1)*block-l+1)*val;
else
even+=((ll-1)*block-l+1)*val;
if(Cal(i,r,block)==1)
odd+=(r-(rr*block))*val;
else
even+=(r-(rr*block))*val;
}
void Check(int64_t block)
{
int64_t tmp=n/block;
int64_t sodd=0,seven=0,codd,ceven;
if(tmp%2==0)
codd=ceven=n*n/2;
else
{
ceven=(n*n+block*block)/2;
codd=n*n-ceven;
}
odd=even=0;
for(int64_t i=1;i<=n;i++)
{
for(int64_t j=0;j<g1[i].size();j++)
Update(i,g1[i][j].first,g1[i][j].second,block,1);
sodd+=odd;
seven+=even;
for(int64_t j=0;j<g2[i].size();j++)
Update(i,g2[i][j].first,g2[i][j].second,block,-1);
}
res=min(res,min(codd-sodd+seven,ceven-seven+sodd));
}
int main()
{
ios_base::sync_with_stdio(false);
//freopen("TEST.INP","r",stdin);
//freopen("TEST.OUT","w",stdout);
ReadInt(n);
ReadInt(k);
int64_t u1,v1,u2,v2;
while(k--)
{
ReadInt(u1);
ReadInt(v1);
ReadInt(u2);
ReadInt(v2);
g1[u1].push_back(ii(v1,v2));
g2[u2].push_back(ii(v1,v2));
}
for(int64_t i=1;i<n;i++)
if(n%i==0)
Check(i);
cout<<res;
}
Compilation message
chessboard.cpp: In function 'void Check(int64_t)':
chessboard.cpp:68:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int64_t j=0;j<g1[i].size();j++)
~^~~~~~~~~~~~~
chessboard.cpp:72:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int64_t j=0;j<g2[i].size();j++)
~^~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
5 ms |
4984 KB |
Output is correct |
| 2 |
Correct |
5 ms |
5096 KB |
Output is correct |
| 3 |
Correct |
5 ms |
5148 KB |
Output is correct |
| 4 |
Correct |
5 ms |
5148 KB |
Output is correct |
| 5 |
Correct |
5 ms |
5148 KB |
Output is correct |
| 6 |
Correct |
5 ms |
5240 KB |
Output is correct |
| 7 |
Correct |
5 ms |
5264 KB |
Output is correct |
| 8 |
Correct |
5 ms |
5280 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
49 ms |
8556 KB |
Output is correct |
| 2 |
Correct |
14 ms |
8556 KB |
Output is correct |
| 3 |
Correct |
31 ms |
8556 KB |
Output is correct |
| 4 |
Correct |
25 ms |
8556 KB |
Output is correct |
| 5 |
Correct |
40 ms |
8556 KB |
Output is correct |
| 6 |
Correct |
26 ms |
8556 KB |
Output is correct |
| 7 |
Correct |
9 ms |
8556 KB |
Output is correct |
| 8 |
Correct |
25 ms |
8556 KB |
Output is correct |
| 9 |
Correct |
55 ms |
9852 KB |
Output is correct |
| 10 |
Correct |
33 ms |
9852 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
5 ms |
9852 KB |
Output is correct |
| 2 |
Correct |
5 ms |
9852 KB |
Output is correct |
| 3 |
Correct |
5 ms |
9852 KB |
Output is correct |
| 4 |
Correct |
6 ms |
9852 KB |
Output is correct |
| 5 |
Correct |
5 ms |
9852 KB |
Output is correct |
| 6 |
Correct |
5 ms |
9852 KB |
Output is correct |
| 7 |
Correct |
6 ms |
9852 KB |
Output is correct |
| 8 |
Correct |
6 ms |
9852 KB |
Output is correct |
| 9 |
Correct |
5 ms |
9852 KB |
Output is correct |
| 10 |
Correct |
5 ms |
9852 KB |
Output is correct |
| 11 |
Correct |
5 ms |
9852 KB |
Output is correct |
| 12 |
Correct |
5 ms |
9852 KB |
Output is correct |
| 13 |
Correct |
6 ms |
9852 KB |
Output is correct |
| 14 |
Correct |
6 ms |
9852 KB |
Output is correct |
| 15 |
Correct |
5 ms |
9852 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
5 ms |
9852 KB |
Output is correct |
| 2 |
Correct |
5 ms |
9852 KB |
Output is correct |
| 3 |
Correct |
5 ms |
9852 KB |
Output is correct |
| 4 |
Correct |
6 ms |
9852 KB |
Output is correct |
| 5 |
Correct |
5 ms |
9852 KB |
Output is correct |
| 6 |
Correct |
5 ms |
9852 KB |
Output is correct |
| 7 |
Correct |
6 ms |
9852 KB |
Output is correct |
| 8 |
Correct |
6 ms |
9852 KB |
Output is correct |
| 9 |
Correct |
5 ms |
9852 KB |
Output is correct |
| 10 |
Correct |
5 ms |
9852 KB |
Output is correct |
| 11 |
Correct |
5 ms |
9852 KB |
Output is correct |
| 12 |
Correct |
5 ms |
9852 KB |
Output is correct |
| 13 |
Correct |
6 ms |
9852 KB |
Output is correct |
| 14 |
Correct |
6 ms |
9852 KB |
Output is correct |
| 15 |
Correct |
5 ms |
9852 KB |
Output is correct |
| 16 |
Correct |
21 ms |
9852 KB |
Output is correct |
| 17 |
Correct |
36 ms |
9852 KB |
Output is correct |
| 18 |
Correct |
58 ms |
9852 KB |
Output is correct |
| 19 |
Correct |
271 ms |
9852 KB |
Output is correct |
| 20 |
Correct |
305 ms |
9852 KB |
Output is correct |
| 21 |
Correct |
34 ms |
9852 KB |
Output is correct |
| 22 |
Correct |
6 ms |
9852 KB |
Output is correct |
| 23 |
Correct |
47 ms |
9852 KB |
Output is correct |
| 24 |
Correct |
54 ms |
9852 KB |
Output is correct |
| 25 |
Correct |
15 ms |
9852 KB |
Output is correct |
| 26 |
Correct |
36 ms |
9852 KB |
Output is correct |
| 27 |
Correct |
59 ms |
9852 KB |
Output is correct |
| 28 |
Correct |
57 ms |
9852 KB |
Output is correct |
| 29 |
Correct |
18 ms |
9852 KB |
Output is correct |
| 30 |
Correct |
7 ms |
9852 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
49 ms |
8556 KB |
Output is correct |
| 2 |
Correct |
14 ms |
8556 KB |
Output is correct |
| 3 |
Correct |
31 ms |
8556 KB |
Output is correct |
| 4 |
Correct |
25 ms |
8556 KB |
Output is correct |
| 5 |
Correct |
40 ms |
8556 KB |
Output is correct |
| 6 |
Correct |
26 ms |
8556 KB |
Output is correct |
| 7 |
Correct |
9 ms |
8556 KB |
Output is correct |
| 8 |
Correct |
25 ms |
8556 KB |
Output is correct |
| 9 |
Correct |
55 ms |
9852 KB |
Output is correct |
| 10 |
Correct |
33 ms |
9852 KB |
Output is correct |
| 11 |
Correct |
5 ms |
9852 KB |
Output is correct |
| 12 |
Correct |
5 ms |
9852 KB |
Output is correct |
| 13 |
Correct |
5 ms |
9852 KB |
Output is correct |
| 14 |
Correct |
6 ms |
9852 KB |
Output is correct |
| 15 |
Correct |
5 ms |
9852 KB |
Output is correct |
| 16 |
Correct |
5 ms |
9852 KB |
Output is correct |
| 17 |
Correct |
6 ms |
9852 KB |
Output is correct |
| 18 |
Correct |
6 ms |
9852 KB |
Output is correct |
| 19 |
Correct |
5 ms |
9852 KB |
Output is correct |
| 20 |
Correct |
5 ms |
9852 KB |
Output is correct |
| 21 |
Correct |
5 ms |
9852 KB |
Output is correct |
| 22 |
Correct |
5 ms |
9852 KB |
Output is correct |
| 23 |
Correct |
6 ms |
9852 KB |
Output is correct |
| 24 |
Correct |
6 ms |
9852 KB |
Output is correct |
| 25 |
Correct |
5 ms |
9852 KB |
Output is correct |
| 26 |
Correct |
21 ms |
9852 KB |
Output is correct |
| 27 |
Correct |
36 ms |
9852 KB |
Output is correct |
| 28 |
Correct |
58 ms |
9852 KB |
Output is correct |
| 29 |
Correct |
271 ms |
9852 KB |
Output is correct |
| 30 |
Correct |
305 ms |
9852 KB |
Output is correct |
| 31 |
Correct |
34 ms |
9852 KB |
Output is correct |
| 32 |
Correct |
6 ms |
9852 KB |
Output is correct |
| 33 |
Correct |
47 ms |
9852 KB |
Output is correct |
| 34 |
Correct |
54 ms |
9852 KB |
Output is correct |
| 35 |
Correct |
15 ms |
9852 KB |
Output is correct |
| 36 |
Correct |
36 ms |
9852 KB |
Output is correct |
| 37 |
Correct |
59 ms |
9852 KB |
Output is correct |
| 38 |
Correct |
57 ms |
9852 KB |
Output is correct |
| 39 |
Correct |
18 ms |
9852 KB |
Output is correct |
| 40 |
Correct |
7 ms |
9852 KB |
Output is correct |
| 41 |
Correct |
460 ms |
9852 KB |
Output is correct |
| 42 |
Correct |
125 ms |
10364 KB |
Output is correct |
| 43 |
Correct |
272 ms |
10364 KB |
Output is correct |
| 44 |
Correct |
108 ms |
10364 KB |
Output is correct |
| 45 |
Correct |
83 ms |
10496 KB |
Output is correct |
| 46 |
Correct |
428 ms |
10496 KB |
Output is correct |
| 47 |
Correct |
72 ms |
10496 KB |
Output is correct |
| 48 |
Correct |
201 ms |
10496 KB |
Output is correct |
| 49 |
Correct |
104 ms |
10496 KB |
Output is correct |
| 50 |
Execution timed out |
2074 ms |
10496 KB |
Time limit exceeded |
| 51 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
5 ms |
4984 KB |
Output is correct |
| 2 |
Correct |
5 ms |
5096 KB |
Output is correct |
| 3 |
Correct |
5 ms |
5148 KB |
Output is correct |
| 4 |
Correct |
5 ms |
5148 KB |
Output is correct |
| 5 |
Correct |
5 ms |
5148 KB |
Output is correct |
| 6 |
Correct |
5 ms |
5240 KB |
Output is correct |
| 7 |
Correct |
5 ms |
5264 KB |
Output is correct |
| 8 |
Correct |
5 ms |
5280 KB |
Output is correct |
| 9 |
Correct |
49 ms |
8556 KB |
Output is correct |
| 10 |
Correct |
14 ms |
8556 KB |
Output is correct |
| 11 |
Correct |
31 ms |
8556 KB |
Output is correct |
| 12 |
Correct |
25 ms |
8556 KB |
Output is correct |
| 13 |
Correct |
40 ms |
8556 KB |
Output is correct |
| 14 |
Correct |
26 ms |
8556 KB |
Output is correct |
| 15 |
Correct |
9 ms |
8556 KB |
Output is correct |
| 16 |
Correct |
25 ms |
8556 KB |
Output is correct |
| 17 |
Correct |
55 ms |
9852 KB |
Output is correct |
| 18 |
Correct |
33 ms |
9852 KB |
Output is correct |
| 19 |
Correct |
5 ms |
9852 KB |
Output is correct |
| 20 |
Correct |
5 ms |
9852 KB |
Output is correct |
| 21 |
Correct |
5 ms |
9852 KB |
Output is correct |
| 22 |
Correct |
6 ms |
9852 KB |
Output is correct |
| 23 |
Correct |
5 ms |
9852 KB |
Output is correct |
| 24 |
Correct |
5 ms |
9852 KB |
Output is correct |
| 25 |
Correct |
6 ms |
9852 KB |
Output is correct |
| 26 |
Correct |
6 ms |
9852 KB |
Output is correct |
| 27 |
Correct |
5 ms |
9852 KB |
Output is correct |
| 28 |
Correct |
5 ms |
9852 KB |
Output is correct |
| 29 |
Correct |
5 ms |
9852 KB |
Output is correct |
| 30 |
Correct |
5 ms |
9852 KB |
Output is correct |
| 31 |
Correct |
6 ms |
9852 KB |
Output is correct |
| 32 |
Correct |
6 ms |
9852 KB |
Output is correct |
| 33 |
Correct |
5 ms |
9852 KB |
Output is correct |
| 34 |
Correct |
21 ms |
9852 KB |
Output is correct |
| 35 |
Correct |
36 ms |
9852 KB |
Output is correct |
| 36 |
Correct |
58 ms |
9852 KB |
Output is correct |
| 37 |
Correct |
271 ms |
9852 KB |
Output is correct |
| 38 |
Correct |
305 ms |
9852 KB |
Output is correct |
| 39 |
Correct |
34 ms |
9852 KB |
Output is correct |
| 40 |
Correct |
6 ms |
9852 KB |
Output is correct |
| 41 |
Correct |
47 ms |
9852 KB |
Output is correct |
| 42 |
Correct |
54 ms |
9852 KB |
Output is correct |
| 43 |
Correct |
15 ms |
9852 KB |
Output is correct |
| 44 |
Correct |
36 ms |
9852 KB |
Output is correct |
| 45 |
Correct |
59 ms |
9852 KB |
Output is correct |
| 46 |
Correct |
57 ms |
9852 KB |
Output is correct |
| 47 |
Correct |
18 ms |
9852 KB |
Output is correct |
| 48 |
Correct |
7 ms |
9852 KB |
Output is correct |
| 49 |
Correct |
460 ms |
9852 KB |
Output is correct |
| 50 |
Correct |
125 ms |
10364 KB |
Output is correct |
| 51 |
Correct |
272 ms |
10364 KB |
Output is correct |
| 52 |
Correct |
108 ms |
10364 KB |
Output is correct |
| 53 |
Correct |
83 ms |
10496 KB |
Output is correct |
| 54 |
Correct |
428 ms |
10496 KB |
Output is correct |
| 55 |
Correct |
72 ms |
10496 KB |
Output is correct |
| 56 |
Correct |
201 ms |
10496 KB |
Output is correct |
| 57 |
Correct |
104 ms |
10496 KB |
Output is correct |
| 58 |
Execution timed out |
2074 ms |
10496 KB |
Time limit exceeded |
| 59 |
Halted |
0 ms |
0 KB |
- |
