oj.uz

Submission #224631

# Submission time Handle Problem Language Result Execution time Memory
224631 2020-04-18T14:15:27 Z infinite_iq The Kingdom of JOIOI (JOI17_joioi) C++14
0 / 100
 231 ms 16248 KB 
#define fast ios_base::sync_with_stdio(0),cin.tie(0),cout.tie(0)
#include <bits/stdc++.h>
using namespace std;
#define sqr 547
#define mid (l+r)/2
#define pb push_back
#define ppb pop_back
#define fi first
#define se second
#define lb lower_bound
#define ub upper_bound
#define ins insert
#define era erase
#define C continue
#define mem(dp,i) memset(dp,i,sizeof(dp))
#define mset multiset
#define all(x) x.begin(), x.end()
typedef long long ll;
typedef short int si;
typedef long double ld;
typedef pair<int,int> pi;
typedef pair<ll,ll> pll;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<pi> vpi;
typedef vector<pll> vpll;
const ll inf=1e18;
const ll mod=1e9+7;
const ld pai=acos(-1);
int n , m ;
int a [2009][2009] , done [2009][2009] ;
int yes ( int x ) {
        int mn = 1e9 , mx = -1e9 ;
        for ( int i = 0 ; i < n ; i ++ ) {
                for ( int j = 0 ; j < m ; j ++ ) {
                        if ( done [i][j] ) C ;
                        mn = min ( mn , a [i][j] ) ;
                        mx = max ( mx , a [i][j] ) ;
                }
        }
        return ( mx - mn <= x ) ;
}
int check1 ( int x ) {
        mem ( done , 0 ) ;
        int last = 1e9 , mx = -1e9 , mn = 1e9 ;
        for ( int i = 0 ; i < n ; i ++ ) {
                int crnt = 0 ;
                for ( int j = 0 ; j < m ; j ++ ) {
                        if ( crnt == last ) break ;
                        int MN  = min ( mn , a [i][j] ) ;
                        int MX  = max ( mx , a [i][j] ) ;
                        if ( MX - MN > x ) {
                                last = crnt ;
                                break ;
                        }
                        mn = MN ;
                        mx = MX ;
                        crnt ++ ;
                        done [i][j] = 1 ;
                }
        }
        return yes ( x ) ;
}
int check2 ( int x ) {
        mem ( done , 0 ) ;
        int last = 1e9 , mx = -1e9 , mn = 1e9 ;
        for ( int i = n-1 ; i >=0 ; i -- ) {
                int crnt = 0 ;
                for ( int j = 0 ; j < m ; j ++ ) {
                        if ( crnt == last ) break ;
                        int MN = min ( mn , a [i][j] ) ;
                        int MX = max ( mx , a [i][j] ) ;
                        if ( MX - MN > x ) {
                                last = crnt ;
                                break ;
                        }
                        mn = MN ;
                        mx = MX ;
                        crnt ++ ;
                        done [i][j] = 1 ;
                }
        }
        return yes ( x ) ;
}
int check3 ( int x ) {
        mem ( done , 0 ) ;
        int last = 1e9 , mx = -1e9 , mn = 1e9 ;
        for ( int i = 0 ; i < n ; i ++ ) {
                int crnt = 0 ;
                for ( int j = m -1 ; j >= 0 ; j -- ) {
                        if ( crnt == last ) break ;
                        int MN = min ( mn , a [i][j] ) ;
                        int MX = max ( mx , a [i][j] ) ;
                        if ( MX - MN > x ) {
                                last = crnt ;
                                break ;
                        }
                        mn = MN ;
                        mx = MX ;
                        crnt ++ ;
                        done [i][j] = 1 ;
                }
        }
        return yes ( x )  ;
}
int check4 ( int x ) {
        mem ( done , 0 ) ;
        int last = 1e9 , mx = -1e9 , mn = 1e9 ;
        for ( int i = n-1 ; i >=0 ; i -- ) {
                int crnt = 0 ;
                for ( int j = m -1 ; j >= 0 ; j -- ) {
                        if ( crnt == last ) break ;
                        int MN = min ( mn , a [i][j] ) ;
                        int MX = max ( mx , a [i][j] ) ;
                        if ( MX - MN > x ) {
                                last = crnt ;
                                break ;
                        }
                        mn = MN ;
                        mx = MX ;
                        crnt ++ ;
                        done [i][j] = 1 ;
                }
        }
        return yes ( x )  ;
}
int main () {
        cin >> n >> m ;
        for ( int i = 0 ; i < n ; i ++ ) {
                for ( int j = 0 ; j < m ; j ++ ) {
                        cin >> a [i][j] ;
                }
        }
        int l = -1 , r = 2e9 ;
        while ( r - l > 1 ) {
                if ( check1 ( mid ) || check2 ( mid ) || check3 ( mid ) || check4 ( mid ) ) r = mid ;
                else l = mid ;
        }
        cout << r << endl ;
}

Subtask #1
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 88 ms 16128 KB Output is correct
2 Correct 82 ms 16128 KB Output is correct
3 Correct 178 ms 16128 KB Output is correct
4 Correct 194 ms 16128 KB Output is correct
5 Correct 172 ms 16128 KB Output is correct
6 Correct 177 ms 16248 KB Output is correct
7 Correct 188 ms 16128 KB Output is correct
8 Correct 174 ms 16128 KB Output is correct
9 Correct 210 ms 16248 KB Output is correct
10 Correct 202 ms 16128 KB Output is correct
11 Correct 231 ms 16128 KB Output is correct
12 Incorrect 192 ms 16248 KB Output isn't correct
13 Halted 0 ms 0 KB -

Subtask #2
0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 88 ms 16128 KB Output is correct
2 Correct 82 ms 16128 KB Output is correct
3 Correct 178 ms 16128 KB Output is correct
4 Correct 194 ms 16128 KB Output is correct
5 Correct 172 ms 16128 KB Output is correct
6 Correct 177 ms 16248 KB Output is correct
7 Correct 188 ms 16128 KB Output is correct
8 Correct 174 ms 16128 KB Output is correct
9 Correct 210 ms 16248 KB Output is correct
10 Correct 202 ms 16128 KB Output is correct
11 Correct 231 ms 16128 KB Output is correct
12 Incorrect 192 ms 16248 KB Output isn't correct
13 Halted 0 ms 0 KB -

Subtask #3
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 88 ms 16128 KB Output is correct
2 Correct 82 ms 16128 KB Output is correct
3 Correct 178 ms 16128 KB Output is correct
4 Correct 194 ms 16128 KB Output is correct
5 Correct 172 ms 16128 KB Output is correct
6 Correct 177 ms 16248 KB Output is correct
7 Correct 188 ms 16128 KB Output is correct
8 Correct 174 ms 16128 KB Output is correct
9 Correct 210 ms 16248 KB Output is correct
10 Correct 202 ms 16128 KB Output is correct
11 Correct 231 ms 16128 KB Output is correct
12 Incorrect 192 ms 16248 KB Output isn't correct
13 Halted 0 ms 0 KB -