#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];
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);
cin>>n>>k;
int64_t 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(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:58:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int64_t j=0;j<g1[i].size();j++)
~^~~~~~~~~~~~~
chessboard.cpp:62:20: 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 |
5104 KB |
Output is correct |
| 3 |
Correct |
5 ms |
5104 KB |
Output is correct |
| 4 |
Correct |
5 ms |
5104 KB |
Output is correct |
| 5 |
Correct |
5 ms |
5180 KB |
Output is correct |
| 6 |
Correct |
5 ms |
5200 KB |
Output is correct |
| 7 |
Correct |
5 ms |
5260 KB |
Output is correct |
| 8 |
Correct |
5 ms |
5312 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
73 ms |
10064 KB |
Output is correct |
| 2 |
Correct |
18 ms |
10064 KB |
Output is correct |
| 3 |
Correct |
43 ms |
10320 KB |
Output is correct |
| 4 |
Correct |
36 ms |
11312 KB |
Output is correct |
| 5 |
Correct |
49 ms |
13068 KB |
Output is correct |
| 6 |
Correct |
35 ms |
13068 KB |
Output is correct |
| 7 |
Correct |
11 ms |
13068 KB |
Output is correct |
| 8 |
Correct |
33 ms |
13944 KB |
Output is correct |
| 9 |
Correct |
80 ms |
18736 KB |
Output is correct |
| 10 |
Correct |
47 ms |
18736 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
6 ms |
18736 KB |
Output is correct |
| 2 |
Correct |
5 ms |
18736 KB |
Output is correct |
| 3 |
Correct |
5 ms |
18736 KB |
Output is correct |
| 4 |
Correct |
8 ms |
18736 KB |
Output is correct |
| 5 |
Correct |
6 ms |
18736 KB |
Output is correct |
| 6 |
Correct |
5 ms |
18736 KB |
Output is correct |
| 7 |
Correct |
6 ms |
18736 KB |
Output is correct |
| 8 |
Correct |
6 ms |
18736 KB |
Output is correct |
| 9 |
Correct |
6 ms |
18736 KB |
Output is correct |
| 10 |
Correct |
5 ms |
18736 KB |
Output is correct |
| 11 |
Correct |
6 ms |
18736 KB |
Output is correct |
| 12 |
Correct |
6 ms |
18736 KB |
Output is correct |
| 13 |
Correct |
6 ms |
18736 KB |
Output is correct |
| 14 |
Correct |
6 ms |
18736 KB |
Output is correct |
| 15 |
Correct |
6 ms |
18736 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
6 ms |
18736 KB |
Output is correct |
| 2 |
Correct |
5 ms |
18736 KB |
Output is correct |
| 3 |
Correct |
5 ms |
18736 KB |
Output is correct |
| 4 |
Correct |
8 ms |
18736 KB |
Output is correct |
| 5 |
Correct |
6 ms |
18736 KB |
Output is correct |
| 6 |
Correct |
5 ms |
18736 KB |
Output is correct |
| 7 |
Correct |
6 ms |
18736 KB |
Output is correct |
| 8 |
Correct |
6 ms |
18736 KB |
Output is correct |
| 9 |
Correct |
6 ms |
18736 KB |
Output is correct |
| 10 |
Correct |
5 ms |
18736 KB |
Output is correct |
| 11 |
Correct |
6 ms |
18736 KB |
Output is correct |
| 12 |
Correct |
6 ms |
18736 KB |
Output is correct |
| 13 |
Correct |
6 ms |
18736 KB |
Output is correct |
| 14 |
Correct |
6 ms |
18736 KB |
Output is correct |
| 15 |
Correct |
6 ms |
18736 KB |
Output is correct |
| 16 |
Correct |
28 ms |
18736 KB |
Output is correct |
| 17 |
Correct |
53 ms |
21652 KB |
Output is correct |
| 18 |
Correct |
79 ms |
23368 KB |
Output is correct |
| 19 |
Correct |
294 ms |
24420 KB |
Output is correct |
| 20 |
Correct |
346 ms |
26132 KB |
Output is correct |
| 21 |
Correct |
52 ms |
27600 KB |
Output is correct |
| 22 |
Correct |
6 ms |
27600 KB |
Output is correct |
| 23 |
Correct |
56 ms |
27600 KB |
Output is correct |
| 24 |
Correct |
74 ms |
29736 KB |
Output is correct |
| 25 |
Correct |
16 ms |
29736 KB |
Output is correct |
| 26 |
Correct |
49 ms |
29736 KB |
Output is correct |
| 27 |
Correct |
72 ms |
31356 KB |
Output is correct |
| 28 |
Correct |
78 ms |
33200 KB |
Output is correct |
| 29 |
Correct |
25 ms |
33200 KB |
Output is correct |
| 30 |
Correct |
8 ms |
33200 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
73 ms |
10064 KB |
Output is correct |
| 2 |
Correct |
18 ms |
10064 KB |
Output is correct |
| 3 |
Correct |
43 ms |
10320 KB |
Output is correct |
| 4 |
Correct |
36 ms |
11312 KB |
Output is correct |
| 5 |
Correct |
49 ms |
13068 KB |
Output is correct |
| 6 |
Correct |
35 ms |
13068 KB |
Output is correct |
| 7 |
Correct |
11 ms |
13068 KB |
Output is correct |
| 8 |
Correct |
33 ms |
13944 KB |
Output is correct |
| 9 |
Correct |
80 ms |
18736 KB |
Output is correct |
| 10 |
Correct |
47 ms |
18736 KB |
Output is correct |
| 11 |
Correct |
6 ms |
18736 KB |
Output is correct |
| 12 |
Correct |
5 ms |
18736 KB |
Output is correct |
| 13 |
Correct |
5 ms |
18736 KB |
Output is correct |
| 14 |
Correct |
8 ms |
18736 KB |
Output is correct |
| 15 |
Correct |
6 ms |
18736 KB |
Output is correct |
| 16 |
Correct |
5 ms |
18736 KB |
Output is correct |
| 17 |
Correct |
6 ms |
18736 KB |
Output is correct |
| 18 |
Correct |
6 ms |
18736 KB |
Output is correct |
| 19 |
Correct |
6 ms |
18736 KB |
Output is correct |
| 20 |
Correct |
5 ms |
18736 KB |
Output is correct |
| 21 |
Correct |
6 ms |
18736 KB |
Output is correct |
| 22 |
Correct |
6 ms |
18736 KB |
Output is correct |
| 23 |
Correct |
6 ms |
18736 KB |
Output is correct |
| 24 |
Correct |
6 ms |
18736 KB |
Output is correct |
| 25 |
Correct |
6 ms |
18736 KB |
Output is correct |
| 26 |
Correct |
28 ms |
18736 KB |
Output is correct |
| 27 |
Correct |
53 ms |
21652 KB |
Output is correct |
| 28 |
Correct |
79 ms |
23368 KB |
Output is correct |
| 29 |
Correct |
294 ms |
24420 KB |
Output is correct |
| 30 |
Correct |
346 ms |
26132 KB |
Output is correct |
| 31 |
Correct |
52 ms |
27600 KB |
Output is correct |
| 32 |
Correct |
6 ms |
27600 KB |
Output is correct |
| 33 |
Correct |
56 ms |
27600 KB |
Output is correct |
| 34 |
Correct |
74 ms |
29736 KB |
Output is correct |
| 35 |
Correct |
16 ms |
29736 KB |
Output is correct |
| 36 |
Correct |
49 ms |
29736 KB |
Output is correct |
| 37 |
Correct |
72 ms |
31356 KB |
Output is correct |
| 38 |
Correct |
78 ms |
33200 KB |
Output is correct |
| 39 |
Correct |
25 ms |
33200 KB |
Output is correct |
| 40 |
Correct |
8 ms |
33200 KB |
Output is correct |
| 41 |
Correct |
505 ms |
36176 KB |
Output is correct |
| 42 |
Correct |
149 ms |
38616 KB |
Output is correct |
| 43 |
Correct |
211 ms |
38616 KB |
Output is correct |
| 44 |
Correct |
111 ms |
38616 KB |
Output is correct |
| 45 |
Correct |
94 ms |
38804 KB |
Output is correct |
| 46 |
Correct |
487 ms |
38804 KB |
Output is correct |
| 47 |
Correct |
87 ms |
38804 KB |
Output is correct |
| 48 |
Correct |
177 ms |
38804 KB |
Output is correct |
| 49 |
Correct |
151 ms |
38804 KB |
Output is correct |
| 50 |
Execution timed out |
2051 ms |
38804 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 |
5104 KB |
Output is correct |
| 3 |
Correct |
5 ms |
5104 KB |
Output is correct |
| 4 |
Correct |
5 ms |
5104 KB |
Output is correct |
| 5 |
Correct |
5 ms |
5180 KB |
Output is correct |
| 6 |
Correct |
5 ms |
5200 KB |
Output is correct |
| 7 |
Correct |
5 ms |
5260 KB |
Output is correct |
| 8 |
Correct |
5 ms |
5312 KB |
Output is correct |
| 9 |
Correct |
73 ms |
10064 KB |
Output is correct |
| 10 |
Correct |
18 ms |
10064 KB |
Output is correct |
| 11 |
Correct |
43 ms |
10320 KB |
Output is correct |
| 12 |
Correct |
36 ms |
11312 KB |
Output is correct |
| 13 |
Correct |
49 ms |
13068 KB |
Output is correct |
| 14 |
Correct |
35 ms |
13068 KB |
Output is correct |
| 15 |
Correct |
11 ms |
13068 KB |
Output is correct |
| 16 |
Correct |
33 ms |
13944 KB |
Output is correct |
| 17 |
Correct |
80 ms |
18736 KB |
Output is correct |
| 18 |
Correct |
47 ms |
18736 KB |
Output is correct |
| 19 |
Correct |
6 ms |
18736 KB |
Output is correct |
| 20 |
Correct |
5 ms |
18736 KB |
Output is correct |
| 21 |
Correct |
5 ms |
18736 KB |
Output is correct |
| 22 |
Correct |
8 ms |
18736 KB |
Output is correct |
| 23 |
Correct |
6 ms |
18736 KB |
Output is correct |
| 24 |
Correct |
5 ms |
18736 KB |
Output is correct |
| 25 |
Correct |
6 ms |
18736 KB |
Output is correct |
| 26 |
Correct |
6 ms |
18736 KB |
Output is correct |
| 27 |
Correct |
6 ms |
18736 KB |
Output is correct |
| 28 |
Correct |
5 ms |
18736 KB |
Output is correct |
| 29 |
Correct |
6 ms |
18736 KB |
Output is correct |
| 30 |
Correct |
6 ms |
18736 KB |
Output is correct |
| 31 |
Correct |
6 ms |
18736 KB |
Output is correct |
| 32 |
Correct |
6 ms |
18736 KB |
Output is correct |
| 33 |
Correct |
6 ms |
18736 KB |
Output is correct |
| 34 |
Correct |
28 ms |
18736 KB |
Output is correct |
| 35 |
Correct |
53 ms |
21652 KB |
Output is correct |
| 36 |
Correct |
79 ms |
23368 KB |
Output is correct |
| 37 |
Correct |
294 ms |
24420 KB |
Output is correct |
| 38 |
Correct |
346 ms |
26132 KB |
Output is correct |
| 39 |
Correct |
52 ms |
27600 KB |
Output is correct |
| 40 |
Correct |
6 ms |
27600 KB |
Output is correct |
| 41 |
Correct |
56 ms |
27600 KB |
Output is correct |
| 42 |
Correct |
74 ms |
29736 KB |
Output is correct |
| 43 |
Correct |
16 ms |
29736 KB |
Output is correct |
| 44 |
Correct |
49 ms |
29736 KB |
Output is correct |
| 45 |
Correct |
72 ms |
31356 KB |
Output is correct |
| 46 |
Correct |
78 ms |
33200 KB |
Output is correct |
| 47 |
Correct |
25 ms |
33200 KB |
Output is correct |
| 48 |
Correct |
8 ms |
33200 KB |
Output is correct |
| 49 |
Correct |
505 ms |
36176 KB |
Output is correct |
| 50 |
Correct |
149 ms |
38616 KB |
Output is correct |
| 51 |
Correct |
211 ms |
38616 KB |
Output is correct |
| 52 |
Correct |
111 ms |
38616 KB |
Output is correct |
| 53 |
Correct |
94 ms |
38804 KB |
Output is correct |
| 54 |
Correct |
487 ms |
38804 KB |
Output is correct |
| 55 |
Correct |
87 ms |
38804 KB |
Output is correct |
| 56 |
Correct |
177 ms |
38804 KB |
Output is correct |
| 57 |
Correct |
151 ms |
38804 KB |
Output is correct |
| 58 |
Execution timed out |
2051 ms |
38804 KB |
Time limit exceeded |
| 59 |
Halted |
0 ms |
0 KB |
- |
