Submission #497331

#	Time	Username	Problem	Language	Result	Execution time	Memory
497331		mansur	Maxcomp (info1cup18_maxcomp)	C++14	100 / 100	138 ms	64320 KiB

maxcomp

#include<bits/stdc++.h>	
 
#pragma optimize ("g",on)
#pragma GCC optimize ("inline")
#pragma GCC optimize ("Ofast")
#pragma GCC optimize ("unroll-loops")
#pragma GCC optimize ("03")
#pragma GCC target ("sse,sse2,sse3,ssse3,sse4,popcnt,abm,avx2,mmx,fma,avx,tune=native")
#pragma comment(linker, "/stack:200000000")
 
//01001101 01100001 01101011 01101000 01100001  01100111 01100001 01111001 
 
using namespace std;
 
#define all(a) a.begin(), a.end()                                                   
#define rall(a) a.rbegin(), a.rend()
#define ll long long
#define pb push_back
#define sz(a) a.size()
#define nl '\n'
#define popb pop_back()                                                                   
#define ld double
#define ull unsigned long long
#define ff first                                         
#define ss second  
#define fix fixed << setprecision
#define pii pair<int, int>                          
#define E exit (0)
#define int long long
 
const int inf = 1e15, N = 1e6 + 1, mod = 998244353;                    
 
vector<pii> dir = {{1, 0}, {0, 1}, {-1, 0}, {0, -1}};

int val1[2000][2000], val2[2000][2000], val3[2000][2000], val4[2000][2000];

main() {                                                         
	//freopen("cowrect.in", "r", stdin);                                                                                     
	//freopen("cowrect.out", "w", stdout);                                                                                     
	ios_base::sync_with_stdio(NULL);                                                                                        
	cin.tie(NULL);
	int n, m;
	cin >> n >> m;
	int a[n + 1][m + 1], ans = 0;
	for (int i = 1; i <= n; i++) {
		for (int j = 1; j <= m; j++) cin >> a[i][j];
	}
	for (int i = 0; i <= n + 1; i++) {
		for (int j = 0; j <= m + 1; j++) {
			val1[i][j] = inf;
			val3[i][j] = inf;
		}
	}
	for (int i = 1; i <= n; i++) {
		for (int j = 1; j <= m; j++) {
			val1[i][j] = min(val1[i - 1][j], val1[i][j - 1]);
			val1[i][j] = min(val1[i][j], a[i][j] - i - j);	
			val2[i][j] = max(val2[i - 1][j], val2[i][j - 1]);
			val2[i][j] = max(val2[i][j], a[i][j] + i + j);
		}
	}
	for (int i = 1; i <= n; i++) {
		for (int j = m; j >= 1; j--) {                        
			val3[i][j] = min(val3[i - 1][j], val3[i][j + 1]);
			val3[i][j] = min(val3[i][j], a[i][j] - i + j);
			val4[i][j] = max(val4[i - 1][j], val4[i][j + 1]);
			val4[i][j] = max(val4[i][j], a[i][j] + i - j);
		}                	
	}
	for (int i = 1; i <= n; i++) {
		for (int j = 1; j <= m; j++) {
			ans = max(ans, a[i][j] - i - j - val1[i][j]);
			ans = max(ans, val2[i][j] - a[i][j] - i - j);
			ans = max(ans, a[i][j] - i + j - val3[i][j]);
			ans = max(ans, val4[i][j] - a[i][j] - i + j);
		}
	}
	cout << ans - 1;
}                                                 

Compilation message (stderr)

maxcomp.cpp:3: warning: ignoring '#pragma optimize ' [-Wunknown-pragmas]
    3 | #pragma optimize ("g",on)
      | 
maxcomp.cpp:9: warning: ignoring '#pragma comment ' [-Wunknown-pragmas]
    9 | #pragma comment(linker, "/stack:200000000")
      | 
maxcomp.cpp:37:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   37 | main() {
      | ^~~~

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