#include <bits/stdc++.h>
using namespace std;
typedef pair<int,int> ii;
int n,k,odd,even;
int64_t res=1e12;
vector<ii> g1[100005],g2[100005];
int Cal(int u,int v,int block)
{
return ((u-1)/block+1+(v-1)/block+1)%2;
}
void Update(int i,int l,int r,int block,int val)
{
int ll=(l-1)/block+2;
int 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,(ll-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(int block)
{
int64_t sodd=0,seven=0,tmp=n/block,codd,ceven;
if(tmp%2==0)
codd=ceven=int64_t(n)*int64_t(n)/int64_t(2);
else
{
ceven=(int64_t(n)*int64_t(n)+int64_t(block)*int64_t(block))/int64_t(2);
codd=int64_t(n)*int64_t(n)-ceven;
}
odd=even=0;
for(int i=1;i<=n;i++)
{
for(int j=0;j<g1[i].size();j++)
Update(i,g1[i][j].first,g1[i][j].second,block,1);
sodd+=odd;
seven+=even;
for(int 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);
cin>>n>>k;
int u1,v1,u2,v2;
while(k--)
{
cin>>u1>>v1>>u2>>v2;
g1[u1].push_back(ii(v1,v2));
g2[u2].push_back(ii(v1,v2));
}
for(int i=1;i<n;i++)
if(n%i==0)
Check(i);
cout<<res;
}
Compilation message
chessboard.cpp: In function 'void Check(int)':
chessboard.cpp:58:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int j=0;j<g1[i].size();j++)
~^~~~~~~~~~~~~
chessboard.cpp:62:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int 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 |
5172 KB |
Output is correct |
| 4 |
Correct |
5 ms |
5172 KB |
Output is correct |
| 5 |
Correct |
5 ms |
5248 KB |
Output is correct |
| 6 |
Correct |
5 ms |
5248 KB |
Output is correct |
| 7 |
Correct |
5 ms |
5324 KB |
Output is correct |
| 8 |
Correct |
5 ms |
5324 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
48 ms |
7932 KB |
Output is correct |
| 2 |
Correct |
16 ms |
7932 KB |
Output is correct |
| 3 |
Correct |
36 ms |
7932 KB |
Output is correct |
| 4 |
Correct |
32 ms |
7932 KB |
Output is correct |
| 5 |
Correct |
50 ms |
7932 KB |
Output is correct |
| 6 |
Correct |
32 ms |
7932 KB |
Output is correct |
| 7 |
Correct |
10 ms |
7932 KB |
Output is correct |
| 8 |
Correct |
30 ms |
7932 KB |
Output is correct |
| 9 |
Correct |
68 ms |
8316 KB |
Output is correct |
| 10 |
Correct |
46 ms |
8316 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
5 ms |
8316 KB |
Output is correct |
| 2 |
Correct |
5 ms |
8316 KB |
Output is correct |
| 3 |
Correct |
5 ms |
8316 KB |
Output is correct |
| 4 |
Correct |
6 ms |
8316 KB |
Output is correct |
| 5 |
Correct |
6 ms |
8316 KB |
Output is correct |
| 6 |
Correct |
5 ms |
8316 KB |
Output is correct |
| 7 |
Correct |
6 ms |
8316 KB |
Output is correct |
| 8 |
Correct |
6 ms |
8316 KB |
Output is correct |
| 9 |
Correct |
6 ms |
8316 KB |
Output is correct |
| 10 |
Correct |
5 ms |
8316 KB |
Output is correct |
| 11 |
Correct |
5 ms |
8316 KB |
Output is correct |
| 12 |
Correct |
5 ms |
8316 KB |
Output is correct |
| 13 |
Correct |
6 ms |
8316 KB |
Output is correct |
| 14 |
Correct |
6 ms |
8316 KB |
Output is correct |
| 15 |
Correct |
6 ms |
8316 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
5 ms |
8316 KB |
Output is correct |
| 2 |
Correct |
5 ms |
8316 KB |
Output is correct |
| 3 |
Correct |
5 ms |
8316 KB |
Output is correct |
| 4 |
Correct |
6 ms |
8316 KB |
Output is correct |
| 5 |
Correct |
6 ms |
8316 KB |
Output is correct |
| 6 |
Correct |
5 ms |
8316 KB |
Output is correct |
| 7 |
Correct |
6 ms |
8316 KB |
Output is correct |
| 8 |
Correct |
6 ms |
8316 KB |
Output is correct |
| 9 |
Correct |
6 ms |
8316 KB |
Output is correct |
| 10 |
Correct |
5 ms |
8316 KB |
Output is correct |
| 11 |
Correct |
5 ms |
8316 KB |
Output is correct |
| 12 |
Correct |
5 ms |
8316 KB |
Output is correct |
| 13 |
Correct |
6 ms |
8316 KB |
Output is correct |
| 14 |
Correct |
6 ms |
8316 KB |
Output is correct |
| 15 |
Correct |
6 ms |
8316 KB |
Output is correct |
| 16 |
Correct |
23 ms |
8316 KB |
Output is correct |
| 17 |
Correct |
45 ms |
8316 KB |
Output is correct |
| 18 |
Correct |
66 ms |
8316 KB |
Output is correct |
| 19 |
Correct |
168 ms |
8316 KB |
Output is correct |
| 20 |
Correct |
178 ms |
8316 KB |
Output is correct |
| 21 |
Correct |
43 ms |
8316 KB |
Output is correct |
| 22 |
Correct |
6 ms |
8316 KB |
Output is correct |
| 23 |
Correct |
40 ms |
8316 KB |
Output is correct |
| 24 |
Correct |
59 ms |
8316 KB |
Output is correct |
| 25 |
Correct |
12 ms |
8316 KB |
Output is correct |
| 26 |
Correct |
42 ms |
8316 KB |
Output is correct |
| 27 |
Correct |
52 ms |
8316 KB |
Output is correct |
| 28 |
Correct |
60 ms |
8316 KB |
Output is correct |
| 29 |
Correct |
21 ms |
8316 KB |
Output is correct |
| 30 |
Correct |
7 ms |
8316 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
48 ms |
7932 KB |
Output is correct |
| 2 |
Correct |
16 ms |
7932 KB |
Output is correct |
| 3 |
Correct |
36 ms |
7932 KB |
Output is correct |
| 4 |
Correct |
32 ms |
7932 KB |
Output is correct |
| 5 |
Correct |
50 ms |
7932 KB |
Output is correct |
| 6 |
Correct |
32 ms |
7932 KB |
Output is correct |
| 7 |
Correct |
10 ms |
7932 KB |
Output is correct |
| 8 |
Correct |
30 ms |
7932 KB |
Output is correct |
| 9 |
Correct |
68 ms |
8316 KB |
Output is correct |
| 10 |
Correct |
46 ms |
8316 KB |
Output is correct |
| 11 |
Correct |
5 ms |
8316 KB |
Output is correct |
| 12 |
Correct |
5 ms |
8316 KB |
Output is correct |
| 13 |
Correct |
5 ms |
8316 KB |
Output is correct |
| 14 |
Correct |
6 ms |
8316 KB |
Output is correct |
| 15 |
Correct |
6 ms |
8316 KB |
Output is correct |
| 16 |
Correct |
5 ms |
8316 KB |
Output is correct |
| 17 |
Correct |
6 ms |
8316 KB |
Output is correct |
| 18 |
Correct |
6 ms |
8316 KB |
Output is correct |
| 19 |
Correct |
6 ms |
8316 KB |
Output is correct |
| 20 |
Correct |
5 ms |
8316 KB |
Output is correct |
| 21 |
Correct |
5 ms |
8316 KB |
Output is correct |
| 22 |
Correct |
5 ms |
8316 KB |
Output is correct |
| 23 |
Correct |
6 ms |
8316 KB |
Output is correct |
| 24 |
Correct |
6 ms |
8316 KB |
Output is correct |
| 25 |
Correct |
6 ms |
8316 KB |
Output is correct |
| 26 |
Correct |
23 ms |
8316 KB |
Output is correct |
| 27 |
Correct |
45 ms |
8316 KB |
Output is correct |
| 28 |
Correct |
66 ms |
8316 KB |
Output is correct |
| 29 |
Correct |
168 ms |
8316 KB |
Output is correct |
| 30 |
Correct |
178 ms |
8316 KB |
Output is correct |
| 31 |
Correct |
43 ms |
8316 KB |
Output is correct |
| 32 |
Correct |
6 ms |
8316 KB |
Output is correct |
| 33 |
Correct |
40 ms |
8316 KB |
Output is correct |
| 34 |
Correct |
59 ms |
8316 KB |
Output is correct |
| 35 |
Correct |
12 ms |
8316 KB |
Output is correct |
| 36 |
Correct |
42 ms |
8316 KB |
Output is correct |
| 37 |
Correct |
52 ms |
8316 KB |
Output is correct |
| 38 |
Correct |
60 ms |
8316 KB |
Output is correct |
| 39 |
Correct |
21 ms |
8316 KB |
Output is correct |
| 40 |
Correct |
7 ms |
8316 KB |
Output is correct |
| 41 |
Correct |
222 ms |
9040 KB |
Output is correct |
| 42 |
Correct |
125 ms |
9468 KB |
Output is correct |
| 43 |
Correct |
164 ms |
9468 KB |
Output is correct |
| 44 |
Correct |
125 ms |
9468 KB |
Output is correct |
| 45 |
Correct |
93 ms |
9496 KB |
Output is correct |
| 46 |
Correct |
246 ms |
9496 KB |
Output is correct |
| 47 |
Correct |
75 ms |
9496 KB |
Output is correct |
| 48 |
Correct |
129 ms |
9496 KB |
Output is correct |
| 49 |
Correct |
88 ms |
9496 KB |
Output is correct |
| 50 |
Correct |
852 ms |
9496 KB |
Output is correct |
| 51 |
Correct |
917 ms |
9496 KB |
Output is correct |
| 52 |
Correct |
856 ms |
9496 KB |
Output is correct |
| 53 |
Correct |
872 ms |
9496 KB |
Output is correct |
| 54 |
Correct |
817 ms |
9496 KB |
Output is correct |
| 55 |
Correct |
1188 ms |
9496 KB |
Output is correct |
| 56 |
Correct |
981 ms |
9496 KB |
Output is correct |
| # |
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 |
5172 KB |
Output is correct |
| 4 |
Correct |
5 ms |
5172 KB |
Output is correct |
| 5 |
Correct |
5 ms |
5248 KB |
Output is correct |
| 6 |
Correct |
5 ms |
5248 KB |
Output is correct |
| 7 |
Correct |
5 ms |
5324 KB |
Output is correct |
| 8 |
Correct |
5 ms |
5324 KB |
Output is correct |
| 9 |
Correct |
48 ms |
7932 KB |
Output is correct |
| 10 |
Correct |
16 ms |
7932 KB |
Output is correct |
| 11 |
Correct |
36 ms |
7932 KB |
Output is correct |
| 12 |
Correct |
32 ms |
7932 KB |
Output is correct |
| 13 |
Correct |
50 ms |
7932 KB |
Output is correct |
| 14 |
Correct |
32 ms |
7932 KB |
Output is correct |
| 15 |
Correct |
10 ms |
7932 KB |
Output is correct |
| 16 |
Correct |
30 ms |
7932 KB |
Output is correct |
| 17 |
Correct |
68 ms |
8316 KB |
Output is correct |
| 18 |
Correct |
46 ms |
8316 KB |
Output is correct |
| 19 |
Correct |
5 ms |
8316 KB |
Output is correct |
| 20 |
Correct |
5 ms |
8316 KB |
Output is correct |
| 21 |
Correct |
5 ms |
8316 KB |
Output is correct |
| 22 |
Correct |
6 ms |
8316 KB |
Output is correct |
| 23 |
Correct |
6 ms |
8316 KB |
Output is correct |
| 24 |
Correct |
5 ms |
8316 KB |
Output is correct |
| 25 |
Correct |
6 ms |
8316 KB |
Output is correct |
| 26 |
Correct |
6 ms |
8316 KB |
Output is correct |
| 27 |
Correct |
6 ms |
8316 KB |
Output is correct |
| 28 |
Correct |
5 ms |
8316 KB |
Output is correct |
| 29 |
Correct |
5 ms |
8316 KB |
Output is correct |
| 30 |
Correct |
5 ms |
8316 KB |
Output is correct |
| 31 |
Correct |
6 ms |
8316 KB |
Output is correct |
| 32 |
Correct |
6 ms |
8316 KB |
Output is correct |
| 33 |
Correct |
6 ms |
8316 KB |
Output is correct |
| 34 |
Correct |
23 ms |
8316 KB |
Output is correct |
| 35 |
Correct |
45 ms |
8316 KB |
Output is correct |
| 36 |
Correct |
66 ms |
8316 KB |
Output is correct |
| 37 |
Correct |
168 ms |
8316 KB |
Output is correct |
| 38 |
Correct |
178 ms |
8316 KB |
Output is correct |
| 39 |
Correct |
43 ms |
8316 KB |
Output is correct |
| 40 |
Correct |
6 ms |
8316 KB |
Output is correct |
| 41 |
Correct |
40 ms |
8316 KB |
Output is correct |
| 42 |
Correct |
59 ms |
8316 KB |
Output is correct |
| 43 |
Correct |
12 ms |
8316 KB |
Output is correct |
| 44 |
Correct |
42 ms |
8316 KB |
Output is correct |
| 45 |
Correct |
52 ms |
8316 KB |
Output is correct |
| 46 |
Correct |
60 ms |
8316 KB |
Output is correct |
| 47 |
Correct |
21 ms |
8316 KB |
Output is correct |
| 48 |
Correct |
7 ms |
8316 KB |
Output is correct |
| 49 |
Correct |
222 ms |
9040 KB |
Output is correct |
| 50 |
Correct |
125 ms |
9468 KB |
Output is correct |
| 51 |
Correct |
164 ms |
9468 KB |
Output is correct |
| 52 |
Correct |
125 ms |
9468 KB |
Output is correct |
| 53 |
Correct |
93 ms |
9496 KB |
Output is correct |
| 54 |
Correct |
246 ms |
9496 KB |
Output is correct |
| 55 |
Correct |
75 ms |
9496 KB |
Output is correct |
| 56 |
Correct |
129 ms |
9496 KB |
Output is correct |
| 57 |
Correct |
88 ms |
9496 KB |
Output is correct |
| 58 |
Correct |
852 ms |
9496 KB |
Output is correct |
| 59 |
Correct |
917 ms |
9496 KB |
Output is correct |
| 60 |
Correct |
856 ms |
9496 KB |
Output is correct |
| 61 |
Correct |
872 ms |
9496 KB |
Output is correct |
| 62 |
Correct |
817 ms |
9496 KB |
Output is correct |
| 63 |
Correct |
1188 ms |
9496 KB |
Output is correct |
| 64 |
Correct |
981 ms |
9496 KB |
Output is correct |
| 65 |
Correct |
6 ms |
9496 KB |
Output is correct |
| 66 |
Correct |
5 ms |
9496 KB |
Output is correct |
| 67 |
Incorrect |
1053 ms |
9496 KB |
Output isn't correct |
| 68 |
Halted |
0 ms |
0 KB |
- |
