-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathB.cpp
More file actions
69 lines (68 loc) · 1.77 KB
/
B.cpp
File metadata and controls
69 lines (68 loc) · 1.77 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
/*
© 2020-10-04 11:05:01 Franco1010 All Rights Reserved
*/
#pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math")
#pragma GCC target("avx,avx2,fma")
#include <bits/stdc++.h>
#define f first
#define s second
#define fore(i,a,b) for(int i = (a), ThxMK = (b); i < ThxMK; ++i)
#define pb push_back
#define all(s) begin(s), end(s)
#define _ ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define sz(s) int(s.size())
#define ENDL '\n'
using namespace std;
typedef long double ld;
typedef long long lli;
typedef pair<lli,lli> ii;
typedef vector<lli> vi;
#define deb(x) cout << #x": " << (x) << endl;
const lli N = 105;
lli mat[N][N];
vector<lli> mm[N][N];
lli f(vector<lli> &v, lli x){
lli res = 0;
for(auto i : v) res += abs(i - x);
return res;
}
lli test(vector<lli> &v){
lli l = 0, r = 1e9;
while(r - l > 2){
lli m1 = l + (r - l) / 3;
lli m2 = r - (r - l) / 3;
if(f(v, m1) < f(v, m2)) r = m2;
else l = m1;
}
lli res = 1e18;
for(lli i = l; i <= r; i++) res = min(res, f(v, i));
return res;
}
int main(){ _
lli t; cin >> t;
while(t--){
lli n, m; cin >> n >> m;
fore(i, 0, n){
fore(j, 0, m){
cin >> mat[i][j];
mm[i][j].clear();
}
}
for(lli i = n - 1; i >= 0; i--){
for(lli j = m - 1; j >= 0; j--){
if(i >= (n + 1ll) / 2ll or j >= (m + 1ll) / 2ll){
if(i >= (n + 1ll) / 2ll and j >= (m + 1ll) / 2ll) mm[n - i - 1][m - j - 1].pb(mat[i][j]);
else if(i >= (n + 1ll) / 2ll) mm[n - i - 1][j].pb(mat[i][j]);
else if(j >= (m + 1ll) / 2ll) mm[i][m - j - 1].pb(mat[i][j]);
mat[i][j] = 0;
}else mm[i][j].pb(mat[i][j]);
}
}
lli res = 0;
fore(i, 0, n){
fore(j, 0, m) res += test(mm[i][j]);
}
cout << res << ENDL;
}
return 0;
}