oj.uz

Submission #286013

# Submission time Handle Problem Language Result Execution time Memory
286013 2020-08-30T00:09:14 Z YJU The Kingdom of JOIOI (JOI17_joioi) C++14
60 / 100
 4000 ms 112248 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){
	REP(i,2)if(BFS(1,1,i,6,k)||BFS(1,m,i,12,k)||BFS(n,1,i,3,k)||BFS(n,m,i,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 512 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 512 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 640 KB Output is correct
16 Correct 85 ms 3832 KB Output is correct
17 Correct 130 ms 4096 KB Output is correct
18 Correct 76 ms 4096 KB Output is correct
19 Correct 98 ms 4096 KB Output is correct
20 Correct 76 ms 3584 KB Output is correct
21 Correct 223 ms 4344 KB Output is correct
22 Correct 106 ms 4096 KB Output is correct
23 Correct 105 ms 4224 KB Output is correct
24 Correct 90 ms 3832 KB Output is correct
25 Correct 105 ms 4224 KB Output is correct
26 Correct 134 ms 4224 KB Output is correct
27 Correct 171 ms 4224 KB Output is correct
28 Correct 183 ms 4344 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 512 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 640 KB Output is correct
16 Correct 85 ms 3832 KB Output is correct
17 Correct 130 ms 4096 KB Output is correct
18 Correct 76 ms 4096 KB Output is correct
19 Correct 98 ms 4096 KB Output is correct
20 Correct 76 ms 3584 KB Output is correct
21 Correct 223 ms 4344 KB Output is correct
22 Correct 106 ms 4096 KB Output is correct
23 Correct 105 ms 4224 KB Output is correct
24 Correct 90 ms 3832 KB Output is correct
25 Correct 105 ms 4224 KB Output is correct
26 Correct 134 ms 4224 KB Output is correct
27 Correct 171 ms 4224 KB Output is correct
28 Correct 183 ms 4344 KB Output is correct
29 Execution timed out 4073 ms 112248 KB Time limit exceeded
30 Halted 0 ms 0 KB -