oj.uz

Submission #1014055

# Submission time Handle Problem Language Result Execution time Memory
1014055 2024-07-04T10:10:56 Z snpmrnhlol The Kingdom of JOIOI (JOI17_joioi) C++17
100 / 100
 2374 ms 86032 KB 
#include<bits/stdc++.h>
using namespace std;
const int N = 2e3;
const int inf = 1e9;
int n,m,mx = -1;
int v[N][N];
int v2[N][N];
int pref[N][N];
bool chk(int x){
    int l = mx - x,r = mx;
    int mx1,mn1,mx2,mn2;
    bool ok = 0;
    for(int k = 0;k < 4;k++){
        for(int i = 0;i < n;i++){
            for(int j = 0;j < m;j++){
                pref[i][j] = min((j == 0?inf:pref[i][j - 1]),v[i][j]);
            }
        }
        int pt = m - 1;
        mx1 = mx2 = -inf;
        mn1 = mn2 = inf;
        for(int i = 0;i < n;i++){
            while(pt >= 0 && pref[i][pt] < l){
                pt--;
            }
            for(int j = 0;j < m;j++){
                if(j <= pt){
                    mx1 = max(mx1,v[i][j]);
                    mn1 = min(mn1,v[i][j]);
                }else{
                    mx2 = max(mx2,v[i][j]);
                    mn2 = min(mn2,v[i][j]);
                }
            }
        }
        if(mx1 - mn1 <= x && mx2 - mn2 <= x){
            ok = 1;
        }
        for(int i = 0;i < n;i++){
            for(int j = 0;j < m;j++){
                v2[j][n - i - 1] = v[i][j];
            }
        }
        swap(n,m);
        for(int i = 0;i < n;i++){
            for(int j = 0;j < m;j++){
                v[i][j] = v2[i][j];
            }
        }
    }
    return ok;
}
int main(){
    cin>>n>>m;
    for(int i = 0;i < n;i++){
        for(int j = 0;j < m;j++){
            cin>>v[i][j];
            mx = max(mx,v[i][j]);
        }
    }
    int l = 0,r = inf;
    while(l != r){
        int mij = (l + r)/2;
        if(chk(mij)){
            r = mij;
        }else l = mij + 1;
    }
    cout<<l<<'\n';
    return 0;
}

Compilation message

joioi.cpp: In function 'bool chk(int)':
joioi.cpp:10:20: warning: unused variable 'r' [-Wunused-variable]
   10 |     int l = mx - x,r = mx;
      |                    ^

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 2392 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2648 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2496 KB Output is correct
6 Correct 1 ms 2540 KB Output is correct
7 Correct 1 ms 2388 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 0 ms 2488 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 0 ms 2396 KB Output is correct
12 Correct 1 ms 4444 KB Output is correct
13 Correct 0 ms 2396 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 2392 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2648 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2496 KB Output is correct
6 Correct 1 ms 2540 KB Output is correct
7 Correct 1 ms 2388 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 0 ms 2488 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 0 ms 2396 KB Output is correct
12 Correct 1 ms 4444 KB Output is correct
13 Correct 0 ms 2396 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 2 ms 3932 KB Output is correct
16 Correct 16 ms 4444 KB Output is correct
17 Correct 22 ms 5724 KB Output is correct
18 Correct 22 ms 4440 KB Output is correct
19 Correct 22 ms 4524 KB Output is correct
20 Correct 19 ms 4444 KB Output is correct
21 Correct 22 ms 5936 KB Output is correct
22 Correct 23 ms 4696 KB Output is correct
23 Correct 26 ms 3672 KB Output is correct
24 Correct 21 ms 3416 KB Output is correct
25 Correct 30 ms 3676 KB Output is correct
26 Correct 24 ms 3676 KB Output is correct
27 Correct 32 ms 3676 KB Output is correct
28 Correct 24 ms 3672 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 2392 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2648 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2496 KB Output is correct
6 Correct 1 ms 2540 KB Output is correct
7 Correct 1 ms 2388 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 0 ms 2488 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 0 ms 2396 KB Output is correct
12 Correct 1 ms 4444 KB Output is correct
13 Correct 0 ms 2396 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 2 ms 3932 KB Output is correct
16 Correct 16 ms 4444 KB Output is correct
17 Correct 22 ms 5724 KB Output is correct
18 Correct 22 ms 4440 KB Output is correct
19 Correct 22 ms 4524 KB Output is correct
20 Correct 19 ms 4444 KB Output is correct
21 Correct 22 ms 5936 KB Output is correct
22 Correct 23 ms 4696 KB Output is correct
23 Correct 26 ms 3672 KB Output is correct
24 Correct 21 ms 3416 KB Output is correct
25 Correct 30 ms 3676 KB Output is correct
26 Correct 24 ms 3676 KB Output is correct
27 Correct 32 ms 3676 KB Output is correct
28 Correct 24 ms 3672 KB Output is correct
29 Correct 2130 ms 69420 KB Output is correct
30 Correct 2028 ms 68648 KB Output is correct
31 Correct 2102 ms 70464 KB Output is correct
32 Correct 2154 ms 70616 KB Output is correct
33 Correct 1967 ms 66892 KB Output is correct
34 Correct 2128 ms 70536 KB Output is correct
35 Correct 2333 ms 86032 KB Output is correct
36 Correct 1987 ms 80604 KB Output is correct
37 Correct 2374 ms 86024 KB Output is correct