oj.uz

Submission #692362

# Submission time Handle Problem Language Result Execution time Memory
692362 2023-02-01T11:14:22 Z Paul_Liao_1457 The Kingdom of JOIOI (JOI17_joioi) C++17
60 / 100
 4000 ms 118888 KB 
//記得跳題
#include<iostream>
#include<array>
#include<vector>
#include<string>
#include<algorithm>
#include<set>
#include<queue>
#include<stack>
#include<math.h>
#include<map>
#include<unordered_map>
#include<cstring>
#include<iomanip>
#include<bitset>
#include<tuple>
 
#define ll long long
#define LL __int128_t
#define DB double
#define FOR(i,a,b) for(int i=a;i<b;i++)
#define REP(i,a,b) for(int i=a;i>=b;i--)
#define pb push_back
#define mp make_pair
#define INF (ll)(2e9)
#define MOD (ll)(1e9+7)
#define F first
#define S second
#define endl "\n"
#define AC ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

using namespace std;
 
struct func{
    bool operator()(const int &x, const int &y) const{
        return x<y;
    }
};
 
template<class T> using PQ=priority_queue<T,vector<T>,func>;
 
void file(){
    freopen("/Users/liaoyunyang/Desktop/meta_in.txt","r",stdin);
    freopen("/Users/liaoyunyang/Desktop/meta_out.txt","w",stdout);
}

int a[2][2005][2005],init[2005][2005],ih,iw,pre[2][2005][2005],suf[2][2005][2005];

int h,w;

void turn(int t){
    FOR(i,1,w+1){
        FOR(j,1,h+1){
            a[t][i][j]=a[t^1][j][w-i+1];
        }
    }
    swap(h,w);
}

void flap(int t){
    FOR(i,1,h+1){
        FOR(j,1,w+1){
            a[t][i][j]=a[t^1][h-i+1][w-j+1];
        }
    }
}

int now=0;
int minn=INF;

bool check(int k){
    //cout<<"k="<<k<<endl;
    FOR(i,1,8){
        bool ok=1;
        if(i==4){
            flap(now^1); now^=1;
        }
        FOR(i,1,h+1){
            pre[1][i][0]=0;
            suf[1][i][w+1]=0;
            pre[0][i][0]=INF;
            suf[0][i][w+1]=INF;
            FOR(j,1,w+1){
                pre[0][i][j]=min(pre[0][i][j-1],a[now][i][j]);
                pre[1][i][j]=max(pre[1][i][j-1],a[now][i][j]);
                //cout<<"pre["<<i<<"]["<<j<<"]="<<pre[1][i][j]<<endl;
            }
            REP(j,w,1){
                suf[0][i][j]=min(suf[0][i][j+1],a[now][i][j]);
                suf[1][i][j]=max(suf[1][i][j+1],a[now][i][j]);
                //cout<<"suf["<<i<<"]["<<j<<"]="<<suf[1][i][j]<<endl;
            }
        }
        int tmp=w,mi=INF,mx=0,lm=INF;
        FOR(x,1,h+1){
            while(tmp>0&&pre[1][x][tmp]>minn+k){
                tmp--;
            }
            lm=min(lm,pre[0][x][tmp]);
            mi=min(mi,suf[0][x][tmp+1]);
            mx=max(mx,suf[1][x][tmp+1]);
            //cout<<"mx="<<mx<<" mi="<<mi<<" lm="<<lm<<" tmp="<<tmp<<endl;
            if(mx-mi>k){
                ok=0; break;
            }
        }
        if(lm!=minn){
            ok=0;
        }
        if(ok){
            return 1;
        }
        turn(now^1); now^=1;
    }
    return 0;
}

signed main(){
    AC;
    cin>>h>>w;
    FOR(i,1,h+1)FOR(j,1,w+1){
        cin>>a[0][i][j]; minn=min(minn,a[0][i][j]);
        
    }
    
    int l=0,r=1e9+1,ans=INF;
    
    while(l<r){
        int mid=(l+r)>>1;
        if(check(mid)){
            r=mid; ans=min(ans,mid);
        }
        else{
            l=mid+1;
        }
    }
    cout<<ans<<endl;
}

 
/*
 4 5
 1 2 4 4
 1 3 2 1
 4 3 1 2
 4 1 6 1
 2 4 2 5
 
 */

Compilation message

joioi.cpp: In function 'void file()':
joioi.cpp:43:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   43 |     freopen("/Users/liaoyunyang/Desktop/meta_in.txt","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
joioi.cpp:44:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   44 |     freopen("/Users/liaoyunyang/Desktop/meta_out.txt","w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 468 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 0 ms 468 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 0 ms 468 KB Output is correct
6 Correct 0 ms 468 KB Output is correct
7 Correct 0 ms 596 KB Output is correct
8 Correct 0 ms 468 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 0 ms 468 KB Output is correct
11 Correct 1 ms 468 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 1 ms 596 KB Output is correct
14 Correct 0 ms 596 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 468 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 0 ms 468 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 0 ms 468 KB Output is correct
6 Correct 0 ms 468 KB Output is correct
7 Correct 0 ms 596 KB Output is correct
8 Correct 0 ms 468 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 0 ms 468 KB Output is correct
11 Correct 1 ms 468 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 1 ms 596 KB Output is correct
14 Correct 0 ms 596 KB Output is correct
15 Correct 2 ms 5204 KB Output is correct
16 Correct 9 ms 6112 KB Output is correct
17 Correct 17 ms 6124 KB Output is correct
18 Correct 17 ms 6116 KB Output is correct
19 Correct 20 ms 6100 KB Output is correct
20 Correct 18 ms 6100 KB Output is correct
21 Correct 26 ms 6128 KB Output is correct
22 Correct 29 ms 6120 KB Output is correct
23 Correct 24 ms 6032 KB Output is correct
24 Correct 24 ms 6092 KB Output is correct
25 Correct 23 ms 6120 KB Output is correct
26 Correct 25 ms 6100 KB Output is correct
27 Correct 27 ms 6128 KB Output is correct
28 Correct 30 ms 6100 KB Output is correct

Subtask #3
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 468 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 0 ms 468 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 0 ms 468 KB Output is correct
6 Correct 0 ms 468 KB Output is correct
7 Correct 0 ms 596 KB Output is correct
8 Correct 0 ms 468 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 0 ms 468 KB Output is correct
11 Correct 1 ms 468 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 1 ms 596 KB Output is correct
14 Correct 0 ms 596 KB Output is correct
15 Correct 2 ms 5204 KB Output is correct
16 Correct 9 ms 6112 KB Output is correct
17 Correct 17 ms 6124 KB Output is correct
18 Correct 17 ms 6116 KB Output is correct
19 Correct 20 ms 6100 KB Output is correct
20 Correct 18 ms 6100 KB Output is correct
21 Correct 26 ms 6128 KB Output is correct
22 Correct 29 ms 6120 KB Output is correct
23 Correct 24 ms 6032 KB Output is correct
24 Correct 24 ms 6092 KB Output is correct
25 Correct 23 ms 6120 KB Output is correct
26 Correct 25 ms 6100 KB Output is correct
27 Correct 27 ms 6128 KB Output is correct
28 Correct 30 ms 6100 KB Output is correct
29 Correct 3589 ms 94600 KB Output is correct
30 Correct 2704 ms 115980 KB Output is correct
31 Correct 3535 ms 117556 KB Output is correct
32 Correct 3172 ms 117544 KB Output is correct
33 Correct 2971 ms 113944 KB Output is correct
34 Correct 3144 ms 117684 KB Output is correct
35 Execution timed out 4029 ms 118888 KB Time limit exceeded
36 Halted 0 ms 0 KB -