Submission #497737

#	Time	Username	Problem	Language	Result	Execution time	Memory
497737		Ziel	Maxcomp (info1cup18_maxcomp)	C++17	100 / 100	166 ms	112392 KiB

maxcomp

/**
 * 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
 
#define int ll
const int INF = 1e14 + 123;
ll dp[5][1200][1200], mn[5][1200][1200], a[1200][1200];

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];
   	
   	auto relax_min = [](int &x, int y) {
   		if (x > y) {
   			x = y;
   			return true;
   		}
   		return false;
   	};
   	auto relax_max = [](int &x, int y) {
   		if (x < y) {
   			x = y;
   			return true;
   		}
   		return false;
   	};
   	for (int k = 0; k <= 4; k++) {
   		for (int i = 0; i <= n + 1; i++) {
   			for (int j = 0; j <= m + 1; j++) {
   				dp[k][i][j] = INF;
   				mn[k][i][j] = INF;
   			}
   		}
   	}
   	for (int i = 1; i <= n; i++)
   		for (int j = 1; j <= m; j++)
   			dp[0][i][j] = a[i][j] - i - j,
   			mn[0][i][j] = min({dp[0][i][j], mn[0][i - 1][j], mn[0][i][j - 1]});
	
	for (int i = 1; i <= n; i++)
   		for (int j = m; j >= 1; j--)
   			dp[1][i][j] = a[i][j] - i + j,
   			mn[1][i][j] = min({dp[1][i][j], mn[1][i - 1][j], mn[1][i][j + 1]});
	
	for (int i = n; i >= 1; i--)
   		for (int j = 1; j <= m; j++)   			
   			dp[2][i][j] = a[i][j] + i - j,
   			mn[2][i][j] = min({dp[2][i][j], mn[2][i + 1][j], mn[2][i][j - 1]});
	
	for (int i = n; i >= 1; i--)
   		for (int j = m; j >= 1; j--)
   			dp[3][i][j] = a[i][j] + i + j,
   			mn[3][i][j] = min({dp[3][i][j], mn[3][i + 1][j], mn[3][i][j + 1]});
   	
   	ll ans = -1;
   	for (int i = 1; i <= n; i++) {
   		for (int j = 1; j <= m; j++) {
   			ans = max(ans, dp[0][i][j] - mn[0][i][j] - 1);
   			ans = max(ans, dp[1][i][j] - mn[1][i][j] - 1);
   			ans = max(ans, dp[2][i][j] - mn[2][i][j] - 1);
   			ans = max(ans, dp[3][i][j] - mn[3][i][j] - 1);
   		}
   	}

   	cout << ans;
}
 
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 (stderr)

maxcomp.cpp: In function 'void solve()':
maxcomp.cpp:71:10: warning: variable 'relax_min' set but not used [-Wunused-but-set-variable]
   71 |     auto relax_min = [](int &x, int y) {
      |          ^~~~~~~~~
maxcomp.cpp:78:10: warning: variable 'relax_max' set but not used [-Wunused-but-set-variable]
   78 |     auto relax_max = [](int &x, int y) {
      |          ^~~~~~~~~
maxcomp.cpp: In function 'void setIO(const string&)':
maxcomp.cpp:144:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  144 |         freopen((f + ".in").c_str(), "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
maxcomp.cpp:145:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  145 |         freopen((f + ".out").c_str(), "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 15 / 15
• Subtask 2: 15 / 15
• Subtask 3: 30 / 30
• Subtask 4: 40 / 40