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Submission #51007

# Submission time Handle Problem Language Result Execution time Memory
51007 2018-06-15T14:40:29 Z Diuven The Kingdom of JOIOI (JOI17_joioi) C++11
100 / 100
 3849 ms 167540 KB 
#include <bits/stdc++.h>
using namespace std;
typedef pair<int, int> pii;
typedef long long lld;
const int MX=2010, inf=2e9;

inline int _max(int x, int y){ return x>y ? x : y; }
inline int _min(int x, int y){ return x<y ? x : y; }

int B[MX][MX];
int w, h;

struct node {
    int val, x, y;
    bool used;
};

int D[MX][MX];

node V[MX*MX];

int solve(){

    int hi=0;
    for(int i=1, idx=0; i<=h; i++)
        for(int j=1; j<=w; j++){
            V[idx++]={B[i][j], i, j, false};
            hi=_max(hi, B[i][j]);
        }

    sort(V, V+h*w, [](node &a, node &b){
        if(a.val==b.val){
            if(a.x==b.x) return a.y<b.y;
            return a.x<b.x;
        }
        return a.val<b.val;
    });
    for(int i=0; i<h*w; i++){
        node &nd=V[i];
        D[nd.x][nd.y]=i;
    }

    int pos[MX]={}; pos[0]=w;
    int mn=inf, mx=0, ans=inf, cnt=0;

    for(int idx=0, nah=0; idx<h*w; idx++){
        int val=V[idx].val, i=V[idx].x;
        for(; i<=h; i++){
            bool uptd=false;
            while(pos[i]<pos[i-1] && B[i][pos[i]+1]<=val){
                uptd=true; pos[i]++;
                int now=B[i][pos[i]];
                mn=_min(mn, now), mx=_max(mx, now);
                V[D[i][pos[i]]].used=true;
                cnt++;
            }
            if(!uptd) break;
        }

        if(cnt==0 || cnt==w*h) continue;
        while(nah<=w*h-1 && V[nah].used) nah++;
        ans=_min(ans, _max(mx-mn, hi-V[nah].val) );
    }
    return ans;
}

void flip_v(){
    for(int i=1; i<=h/2; i++)
        for(int j=1; j<=w; j++)
            swap(B[i][j], B[h-i+1][j]);
}

void flip_h(){
    for(int i=1; i<=h; i++)
        for(int j=1; j<=w/2; j++)
            swap(B[i][j], B[i][w-j+1]);
}

int main(){
    ios::sync_with_stdio(0); cin.tie(0);
    cin>>h>>w;
    for(int i=1; i<=h; i++)
        for(int j=1; j<=w; j++)
            cin>>B[i][j];
    int ans=solve();
    flip_v();
    ans=min(ans, solve());
    flip_h();
    ans=min(ans, solve());
    flip_v();
    ans=min(ans, solve());
    cout<<ans;
    return 0;
}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 624 KB Output is correct
3 Correct 2 ms 624 KB Output is correct
4 Correct 2 ms 624 KB Output is correct
5 Correct 2 ms 624 KB Output is correct
6 Correct 2 ms 624 KB Output is correct
7 Correct 2 ms 624 KB Output is correct
8 Correct 2 ms 624 KB Output is correct
9 Correct 2 ms 624 KB Output is correct
10 Correct 2 ms 640 KB Output is correct
11 Correct 2 ms 640 KB Output is correct
12 Correct 2 ms 640 KB Output is correct
13 Correct 2 ms 640 KB Output is correct
14 Correct 2 ms 716 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 624 KB Output is correct
3 Correct 2 ms 624 KB Output is correct
4 Correct 2 ms 624 KB Output is correct
5 Correct 2 ms 624 KB Output is correct
6 Correct 2 ms 624 KB Output is correct
7 Correct 2 ms 624 KB Output is correct
8 Correct 2 ms 624 KB Output is correct
9 Correct 2 ms 624 KB Output is correct
10 Correct 2 ms 640 KB Output is correct
11 Correct 2 ms 640 KB Output is correct
12 Correct 2 ms 640 KB Output is correct
13 Correct 2 ms 640 KB Output is correct
14 Correct 2 ms 716 KB Output is correct
15 Correct 3 ms 716 KB Output is correct
16 Correct 26 ms 3064 KB Output is correct
17 Correct 25 ms 3064 KB Output is correct
18 Correct 25 ms 3192 KB Output is correct
19 Correct 25 ms 3192 KB Output is correct
20 Correct 22 ms 3192 KB Output is correct
21 Correct 31 ms 3196 KB Output is correct
22 Correct 26 ms 3196 KB Output is correct
23 Correct 25 ms 3196 KB Output is correct
24 Correct 23 ms 3196 KB Output is correct
25 Correct 26 ms 3196 KB Output is correct
26 Correct 26 ms 3196 KB Output is correct
27 Correct 27 ms 3196 KB Output is correct
28 Correct 26 ms 3196 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 624 KB Output is correct
3 Correct 2 ms 624 KB Output is correct
4 Correct 2 ms 624 KB Output is correct
5 Correct 2 ms 624 KB Output is correct
6 Correct 2 ms 624 KB Output is correct
7 Correct 2 ms 624 KB Output is correct
8 Correct 2 ms 624 KB Output is correct
9 Correct 2 ms 624 KB Output is correct
10 Correct 2 ms 640 KB Output is correct
11 Correct 2 ms 640 KB Output is correct
12 Correct 2 ms 640 KB Output is correct
13 Correct 2 ms 640 KB Output is correct
14 Correct 2 ms 716 KB Output is correct
15 Correct 3 ms 716 KB Output is correct
16 Correct 26 ms 3064 KB Output is correct
17 Correct 25 ms 3064 KB Output is correct
18 Correct 25 ms 3192 KB Output is correct
19 Correct 25 ms 3192 KB Output is correct
20 Correct 22 ms 3192 KB Output is correct
21 Correct 31 ms 3196 KB Output is correct
22 Correct 26 ms 3196 KB Output is correct
23 Correct 25 ms 3196 KB Output is correct
24 Correct 23 ms 3196 KB Output is correct
25 Correct 26 ms 3196 KB Output is correct
26 Correct 26 ms 3196 KB Output is correct
27 Correct 27 ms 3196 KB Output is correct
28 Correct 26 ms 3196 KB Output is correct
29 Correct 3537 ms 90088 KB Output is correct
30 Correct 3417 ms 90272 KB Output is correct
31 Correct 3720 ms 94620 KB Output is correct
32 Correct 3849 ms 94888 KB Output is correct
33 Correct 3243 ms 94888 KB Output is correct
34 Correct 3731 ms 94888 KB Output is correct
35 Correct 3690 ms 94888 KB Output is correct
36 Correct 3223 ms 120420 KB Output is correct
37 Correct 3591 ms 167540 KB Output is correct