#include<bits/stdc++.h>
using namespace std;
void local() {
#define taskname ""
if (fopen(taskname".inp", "r")) {
freopen(taskname".inp", "r", stdin);
freopen(taskname".out", "w", stdout);
}
}
#define ll long long
#define fastio ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
template<class X, class Y> bool mini(X &a, const Y &b) {return (a > b) ? a = b, true : false;}
template<class X, class Y> bool maxi(X &a, const Y &b) {return (a < b) ? a = b, true : false;}
const int N = 3e3 + 5;
int n;
ll a[N][N];
namespace sub1 {
bool check() {
return n <= 16;
}
ll solve(int st, int en, int l, int r) {
int mid = (l + r) >> 1;
if((st <= mid && en <= mid) || (st > mid && en > mid)) return 1e18;
if(r - l == 1) {
return a[st][en];
}
ll res = 1e18;
for(int i = l; i <= mid; i++) {
for(int j = mid + 1; j <= r; j++) {
if(st <= mid) {
mini(res, a[i][j] + solve(st, i, l, mid) + solve(j, en, mid + 1, r));
}
else {
mini(res, a[i][j] + solve(st, j, mid + 1, r) + solve(i, en, l, mid));
}
}
}
return res;
}
void solve() {
ll res = 1e18;
for(int i = 1; i <= n / 2; i++) {
for(int j = n / 2 + 1; j <= n; j++) {
mini(res, solve(i, j, 1, n));
mini(res, solve(j, i, 1, n));
}
}
cout << res;
}
}
namespace sub4 {
ll dp[N][N], cur[N][N];
void solve(int l, int r) {
if(r - l == 1) {
dp[l][r] = dp[r][l] = a[l][r];
return;
}
int mid = (l + r) >> 1, mid1 = (l + mid) >> 1, mid2 = (mid + 1 + r) >> 1;
solve(l, mid); solve(mid + 1, r);
for(int i1 = l; i1 <= mid1; i1++) {
for(int i2 = mid1 + 1; i2 <= mid; i2++) {
for(int j = mid + 1; j <= r; j++) {
mini(cur[i1][j], dp[i1][i2] + a[i2][j]);
mini(cur[i2][j], dp[i1][i2] + a[i1][j]);
}
}
}
for(int i = l; i <= mid; i++) {
for(int j1 = mid + 1; j1 <= mid2; j1++) {
for(int j2 = mid2 + 1; j2 <= r; j2++) {
mini(dp[i][j1], cur[i][j2] + dp[j1][j2]);
mini(dp[i][j2], cur[i][j1] + dp[j1][j2]);
}
}
}
}
void solve() {
ll res = 1e18;
for(int i = 1; i <= n; i++) {
for(int j = 1; j <= n; j++) {
dp[i][j] = 1e18;
cur[i][j] = 1e18;
}
}
for(int i = 1; i <= n; i++) a[i][i] = 1e18;
solve(1, n);
for(int i = 1; i <= n / 2; i++) {
for(int j = n / 2 + 1; j <= n; j++) {
mini(res, dp[i][j]);
}
}
cout << res;
}
}
int main() {
fastio; local();
cin >> n;
for(int i = 1; i <= n; i++) {
for(int j = 1; j <= n; j++) {
cin >> a[i][j];
}
}
sub4::solve();
}
Compilation message
Main.cpp: In function 'void local()':
Main.cpp:7:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
7 | freopen(taskname".inp", "r", stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:8:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
8 | freopen(taskname".out", "w", stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
600 KB |
Output is correct |
2 |
Correct |
0 ms |
604 KB |
Output is correct |
3 |
Correct |
1 ms |
468 KB |
Output is correct |
4 |
Correct |
0 ms |
604 KB |
Output is correct |
5 |
Correct |
0 ms |
600 KB |
Output is correct |
6 |
Correct |
0 ms |
604 KB |
Output is correct |
7 |
Correct |
0 ms |
604 KB |
Output is correct |
8 |
Correct |
0 ms |
604 KB |
Output is correct |
9 |
Correct |
0 ms |
604 KB |
Output is correct |
10 |
Correct |
1 ms |
604 KB |
Output is correct |
11 |
Correct |
1 ms |
472 KB |
Output is correct |
12 |
Correct |
0 ms |
604 KB |
Output is correct |
13 |
Correct |
1 ms |
656 KB |
Output is correct |
14 |
Correct |
1 ms |
604 KB |
Output is correct |
15 |
Correct |
0 ms |
604 KB |
Output is correct |
16 |
Correct |
0 ms |
604 KB |
Output is correct |
17 |
Correct |
0 ms |
604 KB |
Output is correct |
18 |
Correct |
0 ms |
604 KB |
Output is correct |
19 |
Correct |
0 ms |
604 KB |
Output is correct |
20 |
Correct |
0 ms |
604 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
600 KB |
Output is correct |
2 |
Correct |
0 ms |
604 KB |
Output is correct |
3 |
Correct |
1 ms |
468 KB |
Output is correct |
4 |
Correct |
0 ms |
604 KB |
Output is correct |
5 |
Correct |
0 ms |
600 KB |
Output is correct |
6 |
Correct |
0 ms |
604 KB |
Output is correct |
7 |
Correct |
0 ms |
604 KB |
Output is correct |
8 |
Correct |
0 ms |
604 KB |
Output is correct |
9 |
Correct |
0 ms |
604 KB |
Output is correct |
10 |
Correct |
1 ms |
604 KB |
Output is correct |
11 |
Correct |
1 ms |
472 KB |
Output is correct |
12 |
Correct |
0 ms |
604 KB |
Output is correct |
13 |
Correct |
1 ms |
656 KB |
Output is correct |
14 |
Correct |
1 ms |
604 KB |
Output is correct |
15 |
Correct |
0 ms |
604 KB |
Output is correct |
16 |
Correct |
0 ms |
604 KB |
Output is correct |
17 |
Correct |
0 ms |
604 KB |
Output is correct |
18 |
Correct |
0 ms |
604 KB |
Output is correct |
19 |
Correct |
0 ms |
604 KB |
Output is correct |
20 |
Correct |
0 ms |
604 KB |
Output is correct |
21 |
Correct |
2 ms |
2396 KB |
Output is correct |
22 |
Correct |
2 ms |
2396 KB |
Output is correct |
23 |
Correct |
2 ms |
2396 KB |
Output is correct |
24 |
Correct |
1 ms |
1372 KB |
Output is correct |
25 |
Correct |
1 ms |
1372 KB |
Output is correct |
26 |
Correct |
2 ms |
2396 KB |
Output is correct |
27 |
Correct |
2 ms |
2396 KB |
Output is correct |
28 |
Correct |
2 ms |
2392 KB |
Output is correct |
29 |
Correct |
2 ms |
2396 KB |
Output is correct |
30 |
Correct |
4 ms |
2372 KB |
Output is correct |
31 |
Correct |
2 ms |
2396 KB |
Output is correct |
32 |
Correct |
2 ms |
2396 KB |
Output is correct |
33 |
Correct |
2 ms |
2396 KB |
Output is correct |
34 |
Correct |
3 ms |
2396 KB |
Output is correct |
35 |
Correct |
2 ms |
2476 KB |
Output is correct |
36 |
Correct |
2 ms |
2396 KB |
Output is correct |
37 |
Correct |
2 ms |
2396 KB |
Output is correct |
38 |
Correct |
2 ms |
2396 KB |
Output is correct |
39 |
Correct |
2 ms |
2396 KB |
Output is correct |
40 |
Correct |
2 ms |
2396 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
600 KB |
Output is correct |
2 |
Correct |
0 ms |
604 KB |
Output is correct |
3 |
Correct |
1 ms |
468 KB |
Output is correct |
4 |
Correct |
0 ms |
604 KB |
Output is correct |
5 |
Correct |
0 ms |
600 KB |
Output is correct |
6 |
Correct |
0 ms |
604 KB |
Output is correct |
7 |
Correct |
0 ms |
604 KB |
Output is correct |
8 |
Correct |
0 ms |
604 KB |
Output is correct |
9 |
Correct |
0 ms |
604 KB |
Output is correct |
10 |
Correct |
1 ms |
604 KB |
Output is correct |
11 |
Correct |
1 ms |
472 KB |
Output is correct |
12 |
Correct |
0 ms |
604 KB |
Output is correct |
13 |
Correct |
1 ms |
656 KB |
Output is correct |
14 |
Correct |
1 ms |
604 KB |
Output is correct |
15 |
Correct |
0 ms |
604 KB |
Output is correct |
16 |
Correct |
0 ms |
604 KB |
Output is correct |
17 |
Correct |
0 ms |
604 KB |
Output is correct |
18 |
Correct |
0 ms |
604 KB |
Output is correct |
19 |
Correct |
0 ms |
604 KB |
Output is correct |
20 |
Correct |
0 ms |
604 KB |
Output is correct |
21 |
Correct |
2 ms |
2396 KB |
Output is correct |
22 |
Correct |
2 ms |
2396 KB |
Output is correct |
23 |
Correct |
2 ms |
2396 KB |
Output is correct |
24 |
Correct |
1 ms |
1372 KB |
Output is correct |
25 |
Correct |
1 ms |
1372 KB |
Output is correct |
26 |
Correct |
2 ms |
2396 KB |
Output is correct |
27 |
Correct |
2 ms |
2396 KB |
Output is correct |
28 |
Correct |
2 ms |
2392 KB |
Output is correct |
29 |
Correct |
2 ms |
2396 KB |
Output is correct |
30 |
Correct |
4 ms |
2372 KB |
Output is correct |
31 |
Correct |
2 ms |
2396 KB |
Output is correct |
32 |
Correct |
2 ms |
2396 KB |
Output is correct |
33 |
Correct |
2 ms |
2396 KB |
Output is correct |
34 |
Correct |
3 ms |
2396 KB |
Output is correct |
35 |
Correct |
2 ms |
2476 KB |
Output is correct |
36 |
Correct |
2 ms |
2396 KB |
Output is correct |
37 |
Correct |
2 ms |
2396 KB |
Output is correct |
38 |
Correct |
2 ms |
2396 KB |
Output is correct |
39 |
Correct |
2 ms |
2396 KB |
Output is correct |
40 |
Correct |
2 ms |
2396 KB |
Output is correct |
41 |
Correct |
40 ms |
15196 KB |
Output is correct |
42 |
Correct |
39 ms |
15184 KB |
Output is correct |
43 |
Correct |
38 ms |
15184 KB |
Output is correct |
44 |
Correct |
39 ms |
15184 KB |
Output is correct |
45 |
Correct |
48 ms |
15072 KB |
Output is correct |
46 |
Correct |
38 ms |
15184 KB |
Output is correct |
47 |
Correct |
38 ms |
15324 KB |
Output is correct |
48 |
Correct |
43 ms |
15188 KB |
Output is correct |
49 |
Correct |
44 ms |
15184 KB |
Output is correct |
50 |
Correct |
38 ms |
15196 KB |
Output is correct |
51 |
Correct |
35 ms |
15276 KB |
Output is correct |
52 |
Correct |
41 ms |
15304 KB |
Output is correct |
53 |
Correct |
36 ms |
15192 KB |
Output is correct |
54 |
Correct |
38 ms |
15196 KB |
Output is correct |
55 |
Correct |
37 ms |
15196 KB |
Output is correct |
56 |
Correct |
42 ms |
15452 KB |
Output is correct |
57 |
Correct |
40 ms |
15352 KB |
Output is correct |
58 |
Correct |
38 ms |
15192 KB |
Output is correct |
59 |
Correct |
37 ms |
15188 KB |
Output is correct |
60 |
Correct |
47 ms |
15184 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
600 KB |
Output is correct |
2 |
Correct |
0 ms |
604 KB |
Output is correct |
3 |
Correct |
1 ms |
468 KB |
Output is correct |
4 |
Correct |
0 ms |
604 KB |
Output is correct |
5 |
Correct |
0 ms |
600 KB |
Output is correct |
6 |
Correct |
0 ms |
604 KB |
Output is correct |
7 |
Correct |
0 ms |
604 KB |
Output is correct |
8 |
Correct |
0 ms |
604 KB |
Output is correct |
9 |
Correct |
0 ms |
604 KB |
Output is correct |
10 |
Correct |
1 ms |
604 KB |
Output is correct |
11 |
Correct |
1 ms |
472 KB |
Output is correct |
12 |
Correct |
0 ms |
604 KB |
Output is correct |
13 |
Correct |
1 ms |
656 KB |
Output is correct |
14 |
Correct |
1 ms |
604 KB |
Output is correct |
15 |
Correct |
0 ms |
604 KB |
Output is correct |
16 |
Correct |
0 ms |
604 KB |
Output is correct |
17 |
Correct |
0 ms |
604 KB |
Output is correct |
18 |
Correct |
0 ms |
604 KB |
Output is correct |
19 |
Correct |
0 ms |
604 KB |
Output is correct |
20 |
Correct |
0 ms |
604 KB |
Output is correct |
21 |
Correct |
2 ms |
2396 KB |
Output is correct |
22 |
Correct |
2 ms |
2396 KB |
Output is correct |
23 |
Correct |
2 ms |
2396 KB |
Output is correct |
24 |
Correct |
1 ms |
1372 KB |
Output is correct |
25 |
Correct |
1 ms |
1372 KB |
Output is correct |
26 |
Correct |
2 ms |
2396 KB |
Output is correct |
27 |
Correct |
2 ms |
2396 KB |
Output is correct |
28 |
Correct |
2 ms |
2392 KB |
Output is correct |
29 |
Correct |
2 ms |
2396 KB |
Output is correct |
30 |
Correct |
4 ms |
2372 KB |
Output is correct |
31 |
Correct |
2 ms |
2396 KB |
Output is correct |
32 |
Correct |
2 ms |
2396 KB |
Output is correct |
33 |
Correct |
2 ms |
2396 KB |
Output is correct |
34 |
Correct |
3 ms |
2396 KB |
Output is correct |
35 |
Correct |
2 ms |
2476 KB |
Output is correct |
36 |
Correct |
2 ms |
2396 KB |
Output is correct |
37 |
Correct |
2 ms |
2396 KB |
Output is correct |
38 |
Correct |
2 ms |
2396 KB |
Output is correct |
39 |
Correct |
2 ms |
2396 KB |
Output is correct |
40 |
Correct |
2 ms |
2396 KB |
Output is correct |
41 |
Correct |
40 ms |
15196 KB |
Output is correct |
42 |
Correct |
39 ms |
15184 KB |
Output is correct |
43 |
Correct |
38 ms |
15184 KB |
Output is correct |
44 |
Correct |
39 ms |
15184 KB |
Output is correct |
45 |
Correct |
48 ms |
15072 KB |
Output is correct |
46 |
Correct |
38 ms |
15184 KB |
Output is correct |
47 |
Correct |
38 ms |
15324 KB |
Output is correct |
48 |
Correct |
43 ms |
15188 KB |
Output is correct |
49 |
Correct |
44 ms |
15184 KB |
Output is correct |
50 |
Correct |
38 ms |
15196 KB |
Output is correct |
51 |
Correct |
35 ms |
15276 KB |
Output is correct |
52 |
Correct |
41 ms |
15304 KB |
Output is correct |
53 |
Correct |
36 ms |
15192 KB |
Output is correct |
54 |
Correct |
38 ms |
15196 KB |
Output is correct |
55 |
Correct |
37 ms |
15196 KB |
Output is correct |
56 |
Correct |
42 ms |
15452 KB |
Output is correct |
57 |
Correct |
40 ms |
15352 KB |
Output is correct |
58 |
Correct |
38 ms |
15192 KB |
Output is correct |
59 |
Correct |
37 ms |
15188 KB |
Output is correct |
60 |
Correct |
47 ms |
15184 KB |
Output is correct |
61 |
Correct |
1105 ms |
164000 KB |
Output is correct |
62 |
Correct |
1188 ms |
163868 KB |
Output is correct |
63 |
Correct |
1174 ms |
163816 KB |
Output is correct |
64 |
Correct |
1176 ms |
163668 KB |
Output is correct |
65 |
Correct |
1177 ms |
164180 KB |
Output is correct |
66 |
Correct |
1149 ms |
163664 KB |
Output is correct |
67 |
Correct |
1078 ms |
163672 KB |
Output is correct |
68 |
Correct |
1101 ms |
163928 KB |
Output is correct |
69 |
Correct |
1113 ms |
164160 KB |
Output is correct |
70 |
Correct |
1117 ms |
163920 KB |
Output is correct |
71 |
Correct |
1014 ms |
164368 KB |
Output is correct |
72 |
Correct |
1020 ms |
164608 KB |
Output is correct |
73 |
Correct |
991 ms |
164348 KB |
Output is correct |
74 |
Correct |
1081 ms |
164384 KB |
Output is correct |
75 |
Correct |
1047 ms |
164560 KB |
Output is correct |
76 |
Correct |
1139 ms |
164556 KB |
Output is correct |
77 |
Correct |
1197 ms |
164436 KB |
Output is correct |
78 |
Correct |
1099 ms |
164436 KB |
Output is correct |
79 |
Correct |
1056 ms |
164372 KB |
Output is correct |
80 |
Correct |
1110 ms |
164436 KB |
Output is correct |