/**
* LES GREATEABLES BRO TEAM
**/
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define sz(x) (int)x.size()
const bool FLAG = false;
void setIO(const string &f = "");
string to_string(const string s) {
return '"' + s + '"';
}
string to_string(const char c) {
return char(39) + string(1, c) + char(39);
}
string to_string(const char* s) {
return to_string(string(s));
}
string to_string(bool f) {
return (f ? "true" : "false");
}
template<class A, class B>
string to_string(const pair<A, B> x) {
return "(" + to_string(x.first) + ", " + to_string(x.second) + ")";
}
template<class A, class B, class C>
string to_string(const tuple<A, B, C> x) {
return "(" + to_string(get<0>(x)) + ", " + to_string(get<1>(x)) + ", " + to_string(get<2>(x)) + ")";
}
template<class A, class B, class C, class D>
string to_string(const tuple<A, B, C, D> x) {
return "(" + to_string(get<0>(x)) + ", " + to_string(get<1>(x)) + ", " + to_string(get<2>(x)) + ", " + to_string(get<3>(x)) + ")";
}
template<class T>
string to_string(const T v) {
string res = "{"; bool f = true;
for (auto x: v)
res += (f ? to_string(x) : ", " + to_string(x)), f = false;
return res + "}";
}
void debug_args() { cerr << "]\n"; }
template<class H, class... T>
void debug_args(H x, T... y) {
cerr << to_string(x);
if (sizeof... (y))
cerr << ", ";
debug_args(y...);
}
#ifdef LOCAL
#define debug(...) cerr << "[" << #__VA_ARGS__ << "]: [", debug_args(__VA_ARGS__);
#else
#define debug(...) 47
#endif
ll dp[2505][55][55], mx[2505][55][55], mn[2505][55][55], a[55][55];
void solve() {
int n, m;
cin >> n >> m;
for (int i = 1; i <= n; i++)
for (int j = 1; j <= m; j++)
cin >> a[i][j];
memset(dp, -1, sizeof(dp));
auto relax = [](ll &x, ll y) {
if (x < y) {
x = y;
return true;
}
return false;
};
for (int k = 1; k <= n * m; k++) {
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= m; j++) {
if (k == 1) {
mx[k][i][j] = a[i][j];
mn[k][i][j] = a[i][j];
dp[k][i][j] = mx[k][i][j] - mn[k][i][j] - k;
} else {
mx[k][i][j] = -1;
mn[k][i][j] = -1;
if (i - 1 >= 1 && mx[k - 1][i - 1][j] != -1 && mn[k - 1][i - 1][j] != -1 && relax(dp[k][i][j], max(a[i][j], mx[k - 1][i - 1][j]) - min(a[i][j], mn[k - 1][i - 1][j]) - k)) {
mx[k][i][j] = max(a[i][j], mx[k - 1][i - 1][j]);
mn[k][i][j] = min(a[i][j], mn[k - 1][i - 1][j]);
}
if (j - 1 >= 1 && mx[k - 1][i][j - 1] != -1 && mn[k - 1][i][j - 1] != -1 && relax(dp[k][i][j], max(a[i][j], mx[k - 1][i][j - 1]) - min(a[i][j], mn[k - 1][i][j - 1]) - k)) {
mx[k][i][j] = max(a[i][j], mx[k - 1][i][j - 1]);
mn[k][i][j] = min(a[i][j], mn[k - 1][i][j - 1]);
}
}
}
}
}
ll res = -1;
for (int k = 1; k <= n * m; k++) {
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= m; j++) {
relax(res, dp[k][i][j]);
}
}
}
cout << res;
}
signed main() {
setIO();
int tt = 1;
if (FLAG) {
cin >> tt;
}
while (tt--) {
solve();
}
return 0;
}
void setIO(const string &f) {
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
if (fopen((f + ".in").c_str(), "r")) {
freopen((f + ".in").c_str(), "r", stdin);
freopen((f + ".out").c_str(), "w", stdout);
}
}
Compilation message
maxcomp.cpp: In function 'void setIO(const string&)':
maxcomp.cpp:128:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
128 | freopen((f + ".in").c_str(), "r", stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
maxcomp.cpp:129:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
129 | freopen((f + ".out").c_str(), "w", stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
22 ms |
59724 KB |
Output is correct |
| 2 |
Correct |
22 ms |
59800 KB |
Output is correct |
| 3 |
Correct |
23 ms |
59820 KB |
Output is correct |
| 4 |
Correct |
21 ms |
59744 KB |
Output is correct |
| 5 |
Correct |
24 ms |
59852 KB |
Output is correct |
| 6 |
Incorrect |
26 ms |
59736 KB |
Output isn't correct |
| 7 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
37 ms |
83404 KB |
Output is correct |
| 2 |
Correct |
32 ms |
83272 KB |
Output is correct |
| 3 |
Correct |
33 ms |
83292 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
22 ms |
59724 KB |
Output is correct |
| 2 |
Correct |
22 ms |
59800 KB |
Output is correct |
| 3 |
Correct |
23 ms |
59820 KB |
Output is correct |
| 4 |
Correct |
21 ms |
59744 KB |
Output is correct |
| 5 |
Correct |
24 ms |
59852 KB |
Output is correct |
| 6 |
Incorrect |
26 ms |
59736 KB |
Output isn't correct |
| 7 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
22 ms |
59724 KB |
Output is correct |
| 2 |
Correct |
22 ms |
59800 KB |
Output is correct |
| 3 |
Correct |
23 ms |
59820 KB |
Output is correct |
| 4 |
Correct |
21 ms |
59744 KB |
Output is correct |
| 5 |
Correct |
24 ms |
59852 KB |
Output is correct |
| 6 |
Incorrect |
26 ms |
59736 KB |
Output isn't correct |
| 7 |
Halted |
0 ms |
0 KB |
- |
