oj.uz

Submission #362896

# Submission time Handle Problem Language Result Execution time Memory
362896 2021-02-04T16:12:59 Z AmineWeslati The Kingdom of JOIOI (JOI17_joioi) C++14
60 / 100
 1819 ms 262148 KB 
//Never stop trying
#include "bits/stdc++.h"
using namespace std;
#define boost ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0)

typedef long long ll;
#define int ll
typedef string str;
typedef long double ld;
typedef pair<int, int> pi;
#define fi first
#define se second
typedef vector<int> vi;
typedef vector<pi> vpi;
#define pb push_back
#define eb emplace_back
#define sz(x) (int)x.size()
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
#define endl "\n"
#define FOR(i,a,b) for (int i = (a); i < (b); ++i)
#define ROF(i,a,b) for (int i = (b)-1; i >= (a); --i)

const int MOD = 1e9 + 7; //998244353
const ll INF = 1e18;
const int MX = 2000 + 10;
const int nx[4] = {0, 0, 1, -1}, ny[4] = {1, -1, 0, 0}; //right left down up

template<class T> using V = vector<T>;
template<class T> bool ckmin(T& a, const T& b) { return a > b ? a = b, 1 : 0; }
template<class T> bool ckmax(T& a, const T& b) { return a < b ? a = b, 1 : 0; }
ll cdiv(ll a, ll b) { return a / b + ((a ^ b) > 0 && a % b); } // divide a by b rounded up
//constexpr int log2(int x) { return 31 - __builtin_clz(x); } // floor(log2(x))

mt19937 rng(chrono::system_clock::now().time_since_epoch().count());
//mt19937_64 rng(chrono::system_clock::now().time_since_epoch().count());
ll random(ll a, ll b){
    return a + rng() % (b - a + 1);
}
#ifndef LOCAL  
#define cerr if(false) cerr
#endif
#define dbg(x) cerr << #x << " : " << x << endl; 
#define dbgs(x,y) cerr << #x << " : " << x << " / " << #y << " : " << y << endl;
#define dbgv(v) cerr << #v << " : " << "[ "; for(auto it : v) cerr << it << ' '; cerr << ']' << endl;
#define here() cerr << "here" << endl;

void IO() {
#ifdef LOCAL
    freopen("input.txt", "r", stdin); 
    freopen("output.txt", "w", stdout);
#endif
}
/////////////////////////ONLY CLEAN CODES ALLOWED/////////////////////////


int N,M,g[MX][MX],vis[MX][MX];
V<pair<int,pi>>vec;
//set<pair<int,pi>>s,ss;
multiset<int>s,ss;

bool grid(int x, int y, int r, int c, int rr, int cc){
	return x>=r && y>=c && x<=rr && y<=cc;
}

void dfs(int x, int y, int r, int c, int rr, int cc){
	if(vis[x][y]) return;
	vis[x][y]=1;
	/*s.insert({g[x][y],{x,y}});
	ss.erase({g[x][y],{x,y}});*/
	s.insert(g[x][y]);
	if(ss.count(g[x][y])) ss.erase(ss.find(g[x][y]));
	FOR(i,0,4){
		int nwx=x+nx[i],nwy=y+ny[i];
		if(grid(nwx,nwy,r,c,rr,cc) && !vis[nwx][nwy]) dfs(nwx,nwy,r,c,rr,cc);
	}
}

int solve(){
	s.clear(); ss.clear();
	for(auto x: vec){
		ss.insert(x.fi);
	}
	FOR(i,0,N) FOR(j,0,M) vis[i][j]=0;

	int ans=INF;
	for(auto x: vec){
		int r=x.se.fi,c=x.se.se;
		dfs(r,c,r,c,N-1,M-1);

		int a=0,b=0;
		if(sz(s)){
			auto it=s.begin(),itr=s.end(); itr--;
			a=(*itr)-(*it);
		}
		if(sz(ss)){
			auto it=ss.begin(),itr=ss.end(); itr--;
			b=(*itr)-(*it);
		}
		ckmin(ans,max(a,b));
	}
	return ans;
}
int solve2(){
	s.clear(); ss.clear();
	for(auto x: vec){
		ss.insert(x.fi);
	}

	FOR(i,0,N) FOR(j,0,M) vis[i][j]=0;

	int ans=INF;
	for(auto x: vec){
		int r=x.se.fi,c=x.se.se;
		dfs(r,c,0,0,r,c);

		int a=0,b=0;
		if(sz(s)){
			auto it=s.begin(),itr=s.end(); itr--;
			a=(*itr)-(*it);
		}
		if(sz(ss)){
			auto it=ss.begin(),itr=ss.end(); itr--;
			b=(*itr)-(*it);
		}
		ckmin(ans,max(a,b));
	}
	return ans;
}
int solve3(){
	s.clear(); ss.clear();
	for(auto x: vec){
		ss.insert(x.fi);
	}
	FOR(i,0,N) FOR(j,0,M) vis[i][j]=0;

	int ans=INF;
	for(auto x: vec){
		int r=x.se.fi,c=x.se.se;
		dfs(r,c,0,c,r,M-1);

		int a=0,b=0;
		if(sz(s)){
			auto it=s.begin(),itr=s.end(); itr--;
			a=(*itr)-(*it);
		}
		if(sz(ss)){
			auto it=ss.begin(),itr=ss.end(); itr--;
			b=(*itr)-(*it);
		}
		ckmin(ans,max(a,b));
	}
	return ans;
}
int solve4(){
	s.clear(); ss.clear();
	for(auto x: vec){
		ss.insert(x.fi);
	}
	FOR(i,0,N) FOR(j,0,M) vis[i][j]=0;

	int ans=INF;
	for(auto x: vec){
		int r=x.se.fi,c=x.se.se;
		dfs(r,c,r,0,N-1,c);

		int a=0,b=0;
		if(sz(s)){
			auto it=s.begin(),itr=s.end(); itr--;
			a=(*itr)-(*it);
		}
		if(sz(ss)){
			auto it=ss.begin(),itr=ss.end(); itr--;
			b=(*itr)-(*it);
		}
		ckmin(ans,max(a,b));
	}
	return ans;
}

int32_t main() {
    boost; IO();

    cin>>N>>M;
    FOR(i,0,N) FOR(j,0,M){
    	cin>>g[i][j];
    	vec.pb({g[i][j],{i,j}});
	}
	sort(all(vec));

	int ans=min(min(solve(),solve2()),min(solve3(),solve4()));
	reverse(all(vec));
	ckmin(ans,min(min(solve(),solve2()),min(solve3(),solve4())));

	cout << ans << endl;

    return 0;
}
//Change your approach

Subtask #1
15.0 / 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 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 492 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 492 KB Output is correct
14 Correct 1 ms 364 KB Output is correct

Subtask #2
45.0 / 45.0

# 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 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 492 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 492 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 8 ms 876 KB Output is correct
16 Correct 178 ms 8032 KB Output is correct
17 Correct 294 ms 7540 KB Output is correct
18 Correct 260 ms 7136 KB Output is correct
19 Correct 265 ms 7520 KB Output is correct
20 Correct 231 ms 7008 KB Output is correct
21 Correct 288 ms 8032 KB Output is correct
22 Correct 259 ms 7392 KB Output is correct
23 Correct 263 ms 7904 KB Output is correct
24 Correct 221 ms 7264 KB Output is correct
25 Correct 262 ms 6880 KB Output is correct
26 Correct 278 ms 8416 KB Output is correct
27 Correct 287 ms 7904 KB Output is correct
28 Correct 268 ms 8032 KB Output is correct

Subtask #3
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 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 492 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 492 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 8 ms 876 KB Output is correct
16 Correct 178 ms 8032 KB Output is correct
17 Correct 294 ms 7540 KB Output is correct
18 Correct 260 ms 7136 KB Output is correct
19 Correct 265 ms 7520 KB Output is correct
20 Correct 231 ms 7008 KB Output is correct
21 Correct 288 ms 8032 KB Output is correct
22 Correct 259 ms 7392 KB Output is correct
23 Correct 263 ms 7904 KB Output is correct
24 Correct 221 ms 7264 KB Output is correct
25 Correct 262 ms 6880 KB Output is correct
26 Correct 278 ms 8416 KB Output is correct
27 Correct 287 ms 7904 KB Output is correct
28 Correct 268 ms 8032 KB Output is correct
29 Runtime error 1819 ms 262148 KB Execution killed with signal 9
30 Halted 0 ms 0 KB -