oj.uz

Submission #364337

# Submission time Handle Problem Language Result Execution time Memory
364337 2021-02-09T02:15:30 Z amunduzbaev Maxcomp (info1cup18_maxcomp) C++14
15 / 100
 17 ms 384 KB 
/** amunduzbaev **/

#include <bits/stdc++.h>
using namespace std;
 
#define ff first
#define ss second
#define pb push_back
#define mp make_pair
#define ub upper_bound
#define lb lower_bound
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(),x.rend()
#define NeedForSpeed ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
//#define x.fff get<0>(x)
//#define x.sss get<1>(x)
//#define x.ttt get<2>(x)
typedef long long ll;
#define int ll
typedef long double ld;
typedef pair<int, int> pii; 
typedef pair<ll, ll> pll; 
typedef vector<ll> vll;
typedef vector<int> vii;
typedef vector<pll> vpll;
typedef vector<pii> vpii;
template<class T> bool umin(T& a, const T& b) {return a > b? a = b, true:false;}
template<class T> bool umax(T& a, const T& b) {return a < b? a = b, true:false;}
 
const int N = 1005; 
const int mod = 1e9+7;
const ll inf = 1e18;
const ld Pi = acos(-1);

#define MULTI 0

int n, m, k, ans, res, a[N][N], dis[N][N]; 
pii ch[4] = {{1, 0}, {-1, 0}, {0, 1}, {0, -1}};

void solve(int t_case){
	cin>>n>>m;
	for(int i=0;i<n;i++)
		for(int j=0;j<m;j++) cin>>a[i][j];
	
	//int res = 0;
	
	for(int i=0;i<n;i++){
		for(int j=0;j<m;j++){
			for(int i=0;i<n;i++) for(int j=0;j<m;j++) dis[i][j] = mod;
			queue<pii> qq;
			qq.push({i, j});
			dis[i][j] = 1;
			int cc = a[i][j];
			umax(res, -1ll);
			
			while(!qq.empty()){
				pii cur = qq.front();  qq.pop();
				for(int i=0;i<4;i++){
					pii tt = cur; tt.ff += ch[i].ff, tt.ss += ch[i].ss;
					if(tt.ff < 0 || tt.ss < 0 || tt.ff >= n || tt.ss >= m) continue;
					if(umin(dis[tt.ff][tt.ss], dis[cur.ff][cur.ss] + 1)){
						umax(res, cc - a[tt.ff][tt.ss] - dis[tt.ff][tt.ss]);
						umax(res, a[tt.ff][tt.ss] - cc - dis[tt.ff][tt.ss]);
						qq.push(tt);
					}
				}
			}
		}
	}
	cout<<res<<"\n";
}

signed main(){
	NeedForSpeed
	
	if(!MULTI) {
		solve(1);
	} else {
		int t; cin>>t;
		for(int t_case = 1; t_case <= t; t_case++) solve(t_case);
	}
	return 0;
}

Subtask #1
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Incorrect 1 ms 364 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 364 KB Output is correct
2 Correct 16 ms 384 KB Output is correct
3 Correct 17 ms 364 KB Output is correct

Subtask #3
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Incorrect 1 ms 364 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #4
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Incorrect 1 ms 364 KB Output isn't correct
4 Halted 0 ms 0 KB -