oj.uz

Submission #286015

# Submission time Handle Problem Language Result Execution time Memory
286015 2020-08-30T00:10:44 Z YJU The Kingdom of JOIOI (JOI17_joioi) C++14
60 / 100
 4000 ms 89984 KB 
#include<bits/stdc++.h>
#pragma GCC optimize("unroll-loops,no-stack-protector")
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<ll,ll> pll;
const ll MOD=1e9+7;
const ll MOD2=998244353;
const ll N=2e3+5;
const ld pi=3.14159265359;
const ll INF=(1LL<<60);
#define SQ(i) ((i)*(i))
#define REP(i,n) for(ll i=0;i<n;i++)
#define REP1(i,n) for(ll i=1;i<=n;i++)
#define pb push_back
#define mp make_pair
#define X first
#define Y second
#define setp setprecision
#define lwb lower_bound
#define SZ(_a) (ll)_a.size()

priority_queue<pair<ll,pll> > pq;
ll n,m,u[N][N],vis[N][N],dg[N][N],ans,x,y;
ll dx[4]={-1,0,1,0},dy[4]={0,1,0,-1};


bool BFS(ll sx,ll sy,ll ty,ll D,ll k){
	REP(i,n+2)REP(j,m+2){
		dg[i][j]=(i==sx?1:0)+(j==sy?1:0);
		vis[i][j]=0;
	}
	ll mn=u[sx][sy],mx=u[sx][sy];
	pq.push(mp(mx,mp(sx,sy)));
	while(SZ(pq)){
		auto tmp=pq.top();pq.pop();
		if(max(mx,tmp.X)-min(mn,tmp.X)>k)continue;
		x=tmp.Y.X;y=tmp.Y.Y;
		vis[x][y]=1;mn=min(mn,tmp.X);mx=max(mx,tmp.X);
		REP(i,4)if((1LL<<i)&D){
			ll nx=x+dx[i],ny=y+dy[i];
			++dg[nx][ny];
			if(dg[nx][ny]==2){
				pq.push(mp(u[nx][ny],mp(nx,ny)));
			}
		}
	}
	mn=INF;mx=-INF;
	REP1(i,n)REP1(j,m){
		if(!vis[i][j])mn=min(mn,u[i][j]),mx=max(mx,u[i][j]);
	}
	return (mx-mn>k?0:1);
}

bool ok(ll k){
	if(BFS(1,1,0,6,k)||BFS(1,m,0,12,k)||BFS(n,1,0,3,k)||BFS(n,m,0,9,k))return 1;
	return 0;
}

int main(){
	ios_base::sync_with_stdio(0);cin.tie(0);
	cin>>n>>m;
	REP1(i,n)REP1(j,m)cin>>u[i][j];
	for(int i=31;i>=0;i--){
		if(!ok(ans+(1LL<<i)))ans+=(1LL<<i);
	}
	cout<<ans+1<<"\n";
	return 0;
}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 512 KB Output is correct
3 Correct 1 ms 512 KB Output is correct
4 Correct 1 ms 512 KB Output is correct
5 Correct 1 ms 512 KB Output is correct
6 Correct 1 ms 420 KB Output is correct
7 Correct 1 ms 512 KB Output is correct
8 Correct 1 ms 512 KB Output is correct
9 Correct 1 ms 512 KB Output is correct
10 Correct 1 ms 512 KB Output is correct
11 Correct 1 ms 512 KB Output is correct
12 Correct 1 ms 512 KB Output is correct
13 Correct 1 ms 512 KB Output is correct
14 Correct 1 ms 512 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 512 KB Output is correct
3 Correct 1 ms 512 KB Output is correct
4 Correct 1 ms 512 KB Output is correct
5 Correct 1 ms 512 KB Output is correct
6 Correct 1 ms 420 KB Output is correct
7 Correct 1 ms 512 KB Output is correct
8 Correct 1 ms 512 KB Output is correct
9 Correct 1 ms 512 KB Output is correct
10 Correct 1 ms 512 KB Output is correct
11 Correct 1 ms 512 KB Output is correct
12 Correct 1 ms 512 KB Output is correct
13 Correct 1 ms 512 KB Output is correct
14 Correct 1 ms 512 KB Output is correct
15 Correct 6 ms 672 KB Output is correct
16 Correct 81 ms 3712 KB Output is correct
17 Correct 96 ms 3840 KB Output is correct
18 Correct 65 ms 3840 KB Output is correct
19 Correct 80 ms 3840 KB Output is correct
20 Correct 58 ms 3456 KB Output is correct
21 Correct 146 ms 3840 KB Output is correct
22 Correct 71 ms 3968 KB Output is correct
23 Correct 69 ms 3840 KB Output is correct
24 Correct 69 ms 3456 KB Output is correct
25 Correct 77 ms 3840 KB Output is correct
26 Correct 83 ms 3960 KB Output is correct
27 Correct 111 ms 3948 KB Output is correct
28 Correct 113 ms 3840 KB Output is correct

Subtask #3
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 512 KB Output is correct
3 Correct 1 ms 512 KB Output is correct
4 Correct 1 ms 512 KB Output is correct
5 Correct 1 ms 512 KB Output is correct
6 Correct 1 ms 420 KB Output is correct
7 Correct 1 ms 512 KB Output is correct
8 Correct 1 ms 512 KB Output is correct
9 Correct 1 ms 512 KB Output is correct
10 Correct 1 ms 512 KB Output is correct
11 Correct 1 ms 512 KB Output is correct
12 Correct 1 ms 512 KB Output is correct
13 Correct 1 ms 512 KB Output is correct
14 Correct 1 ms 512 KB Output is correct
15 Correct 6 ms 672 KB Output is correct
16 Correct 81 ms 3712 KB Output is correct
17 Correct 96 ms 3840 KB Output is correct
18 Correct 65 ms 3840 KB Output is correct
19 Correct 80 ms 3840 KB Output is correct
20 Correct 58 ms 3456 KB Output is correct
21 Correct 146 ms 3840 KB Output is correct
22 Correct 71 ms 3968 KB Output is correct
23 Correct 69 ms 3840 KB Output is correct
24 Correct 69 ms 3456 KB Output is correct
25 Correct 77 ms 3840 KB Output is correct
26 Correct 83 ms 3960 KB Output is correct
27 Correct 111 ms 3948 KB Output is correct
28 Correct 113 ms 3840 KB Output is correct
29 Execution timed out 4050 ms 89984 KB Time limit exceeded
30 Halted 0 ms 0 KB -