oj.uz

Submission #224710

# Submission time Handle Problem Language Result Execution time Memory
224710 2020-04-18T16:05:21 Z Ruxandra985 The Kingdom of JOIOI (JOI17_joioi) C++14
60 / 100
 4000 ms 81380 KB 
#include <bits/stdc++.h>
#define DIMN 2010
using namespace std;

int mini , maxi , n , m , sol;
int a[DIMN][DIMN] , where[DIMN][DIMN] , h[DIMN];
priority_queue <pair <int , pair <int,int> > > up , down;


void solve(){
    int i , j , maxis , minis , maxij , minij , val , ic , jc;

    /// jos includ mini, sus includ maxi

    for (i = 1 ; i <= n ; i++){
        for (j = 1 ; j <= m ; j++)
            where[i][j] = 0;
    }

    for (j = 1 ; j <= m ; j++){

        for (i = 1 ; i <= n ; i++){
            if (a[i][j] == mini)
                break;
        }

        h[j] = max(n - i + 1 , h[j - 1]); /// fie iau exact cat trb fie mai mult


        for (i = 1 ; i <= h[j] ; i++)
            where[n - i + 1][j] = 1; /// apartine tarii de jos

    }

    minij = minis = 2000000000;
    maxij = maxis = -2000000000;

    /// e clar ca toate mini urile sunt jos

    for (i = 1 ; i <= n ; i++){
        for (j = 1 ; j <= m ; j++){
            if (where[i][j] == 0){
                minis = min (minis , a[i][j]);
                maxis = max (maxis , a[i][j]);
            }
            else {
                minij = min (minij , a[i][j]);
                maxij = max (maxij , a[i][j]);
            }
        }
    }

    /// daca exista vreun maxi jos, nu e ok

    if (maxij == maxi)
        return;

    /// altfel, toate mini urile sunt jos, toate maxi urile sunt sus

    while (!down.empty())
        down.pop();
    while (!up.empty())
        up.pop();

    for (j = 1 ; j <= m ; j++){
        if (j == m || h[j] < h[j + 1])
            down.push( make_pair( -a[n - h[j]][j] , make_pair(n - h[j] , j)) );
    }

    /// in down pui candidatii


    for (i = 1 ; i <= n ; i++){
        for (j = 1 ; j <= m ; j++){
            if (where[i][j] == 0){
                up.push( make_pair( -a[i][j] , make_pair(i , j)) );
            }
        }
    }

    while (!down.empty()){

        val = -down.top().first;
        ic = down.top().second.first;
        jc = down.top().second.second;

        down.pop();

        /// val = cea mai mica val cu care pot sa extind

        maxij = max(maxij , val);

        if (maxij == maxi)
            return;

        where[ic][jc] = 1;

        h[jc]++;

        if (h[jc - 1] + 1 == h[jc] && jc - 1 != 0 && n - h[jc - 1] > 0)
            down.push( make_pair( -a[n - h[jc - 1]][jc - 1] , make_pair(n - h[jc - 1] , jc - 1)) );

        if ((jc == m || h[jc] != h[jc + 1]) && n - h[jc] > 0)
            down.push( make_pair( -a[n - h[jc]][jc] , make_pair(n - h[jc] , jc)) );

        val = -up.top().first;
        minis = val;
        ic = up.top().second.first;
        jc = up.top().second.second;

        while (where[ic][jc]){
            up.pop();
            if (up.empty())
                break;
            val = -up.top().first;
            ic = up.top().second.first;
            jc = up.top().second.second;
            minis = val;
        }
        if (!up.empty())
            sol = min(sol , max(maxis - minis , maxij - minij));
        else break;
    }


}

int main()
{
    FILE *fin = stdin;
    FILE *fout = stdout;
    int i , j , st , dr;
    fscanf (fin,"%d%d",&n,&m);

    mini = 2000000000;
    maxi = -2000000000;

    for (i = 1 ; i <= n ; i++){
        for (j = 1 ; j <= m ; j++){
            fscanf (fin,"%d",&a[i][j]);
            mini = min(mini , a[i][j]);
            maxi = max(maxi , a[i][j]);
        }
    }

    sol = maxi - mini;

    solve();

    for (i = 1 ; i <= n ; i++){
        st = 1;
        dr = m;
        while (st < dr){
            swap(a[i][st] , a[i][dr]);
            st++;
            dr--;
        }
    }

    solve();

    for (j = 1 ; j <= m ; j++){
        st = 1;
        dr = n;
        while (st < dr){
            swap(a[st][j] , a[dr][j]);
            st++;
            dr--;
        }
    }

    solve();

    for (i = 1 ; i <= n ; i++){
        st = 1;
        dr = m;
        while (st < dr){
            swap(a[i][st] , a[i][dr]);
            st++;
            dr--;
        }
    }

    solve();

    fprintf (fout,"%d",sol);

    return 0;
}

Compilation message

joioi.cpp: In function 'int main()':
joioi.cpp:133:12: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     fscanf (fin,"%d%d",&n,&m);
     ~~~~~~~^~~~~~~~~~~~~~~~~~
joioi.cpp:140:20: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             fscanf (fin,"%d",&a[i][j]);
             ~~~~~~~^~~~~~~~~~~~~~~~~~~

Subtask #1
15.0 / 15.0

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

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 4 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 5 ms 384 KB Output is correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 5 ms 384 KB Output is correct
14 Correct 4 ms 384 KB Output is correct
15 Correct 5 ms 512 KB Output is correct
16 Correct 10 ms 2304 KB Output is correct
17 Correct 29 ms 3452 KB Output is correct
18 Correct 32 ms 3452 KB Output is correct
19 Correct 34 ms 3452 KB Output is correct
20 Correct 28 ms 3196 KB Output is correct
21 Correct 33 ms 3452 KB Output is correct
22 Correct 25 ms 3452 KB Output is correct
23 Correct 34 ms 3452 KB Output is correct
24 Correct 30 ms 3196 KB Output is correct
25 Correct 30 ms 3452 KB Output is correct
26 Correct 28 ms 3452 KB Output is correct
27 Correct 28 ms 3452 KB Output is correct
28 Correct 30 ms 3452 KB Output is correct

Subtask #3
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 4 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 5 ms 384 KB Output is correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 5 ms 384 KB Output is correct
14 Correct 4 ms 384 KB Output is correct
15 Correct 5 ms 512 KB Output is correct
16 Correct 10 ms 2304 KB Output is correct
17 Correct 29 ms 3452 KB Output is correct
18 Correct 32 ms 3452 KB Output is correct
19 Correct 34 ms 3452 KB Output is correct
20 Correct 28 ms 3196 KB Output is correct
21 Correct 33 ms 3452 KB Output is correct
22 Correct 25 ms 3452 KB Output is correct
23 Correct 34 ms 3452 KB Output is correct
24 Correct 30 ms 3196 KB Output is correct
25 Correct 30 ms 3452 KB Output is correct
26 Correct 28 ms 3452 KB Output is correct
27 Correct 28 ms 3452 KB Output is correct
28 Correct 30 ms 3452 KB Output is correct
29 Correct 1151 ms 79860 KB Output is correct
30 Correct 1218 ms 81300 KB Output is correct
31 Correct 1297 ms 81376 KB Output is correct
32 Correct 1197 ms 81372 KB Output is correct
33 Correct 1169 ms 77428 KB Output is correct
34 Correct 1287 ms 81256 KB Output is correct
35 Correct 3156 ms 81312 KB Output is correct
36 Correct 3490 ms 81200 KB Output is correct
37 Execution timed out 4074 ms 81380 KB Time limit exceeded