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답안 #224717

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
224717 2020-04-18T16:12:22 Z Ruxandra985 The Kingdom of JOIOI (JOI17_joioi) C++14
100 / 100
 3312 ms 120108 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;
char buff[DIMN * DIMN * 12];
int pos;

int getnr(){
    int nr = 0;

    while ('0' > buff[pos] || buff[pos] > '9')
        pos++;

    while ('0' <= buff[pos] && buff[pos] <= '9'){
        nr = nr * 10 + buff[pos] - '0';
        pos++;
    }

    return nr;

}

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

    /// jos includ mini, sus includ maxi

    for (i = 1 ; i <= n ; ++i)
        memset (where[i] , 0 , sizeof(where[i]));

    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;

    fread(buff , 1 , DIMN * DIMN * 12 , fin);

    n = getnr();
    m = getnr();


    mini = 2000000000;
    maxi = -2000000000;

    for (i = 1 ; i <= n ; i++){
        for (j = 1 ; j <= m ; j++){
            a[i][j] = getnr();
            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:148:10: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
     fread(buff , 1 , DIMN * DIMN * 12 , fin);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 512 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 512 KB Output is correct
6 Correct 5 ms 512 KB Output is correct
7 Correct 4 ms 512 KB Output is correct
8 Correct 5 ms 512 KB Output is correct
9 Correct 5 ms 512 KB Output is correct
10 Correct 5 ms 512 KB Output is correct
11 Correct 5 ms 512 KB Output is correct
12 Correct 5 ms 512 KB Output is correct
13 Correct 4 ms 512 KB Output is correct
14 Correct 5 ms 512 KB Output is correct

Subtask #2
45.0 / 45.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 512 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 512 KB Output is correct
6 Correct 5 ms 512 KB Output is correct
7 Correct 4 ms 512 KB Output is correct
8 Correct 5 ms 512 KB Output is correct
9 Correct 5 ms 512 KB Output is correct
10 Correct 5 ms 512 KB Output is correct
11 Correct 5 ms 512 KB Output is correct
12 Correct 5 ms 512 KB Output is correct
13 Correct 4 ms 512 KB Output is correct
14 Correct 5 ms 512 KB Output is correct
15 Correct 5 ms 512 KB Output is correct
16 Correct 7 ms 2944 KB Output is correct
17 Correct 23 ms 4092 KB Output is correct
18 Correct 25 ms 3964 KB Output is correct
19 Correct 25 ms 4092 KB Output is correct
20 Correct 22 ms 3708 KB Output is correct
21 Correct 25 ms 4144 KB Output is correct
22 Correct 18 ms 4220 KB Output is correct
23 Correct 27 ms 4092 KB Output is correct
24 Correct 25 ms 3836 KB Output is correct
25 Correct 23 ms 4220 KB Output is correct
26 Correct 23 ms 4220 KB Output is correct
27 Correct 20 ms 4148 KB Output is correct
28 Correct 23 ms 4220 KB Output is correct

Subtask #3
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 512 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 512 KB Output is correct
6 Correct 5 ms 512 KB Output is correct
7 Correct 4 ms 512 KB Output is correct
8 Correct 5 ms 512 KB Output is correct
9 Correct 5 ms 512 KB Output is correct
10 Correct 5 ms 512 KB Output is correct
11 Correct 5 ms 512 KB Output is correct
12 Correct 5 ms 512 KB Output is correct
13 Correct 4 ms 512 KB Output is correct
14 Correct 5 ms 512 KB Output is correct
15 Correct 5 ms 512 KB Output is correct
16 Correct 7 ms 2944 KB Output is correct
17 Correct 23 ms 4092 KB Output is correct
18 Correct 25 ms 3964 KB Output is correct
19 Correct 25 ms 4092 KB Output is correct
20 Correct 22 ms 3708 KB Output is correct
21 Correct 25 ms 4144 KB Output is correct
22 Correct 18 ms 4220 KB Output is correct
23 Correct 27 ms 4092 KB Output is correct
24 Correct 25 ms 3836 KB Output is correct
25 Correct 23 ms 4220 KB Output is correct
26 Correct 23 ms 4220 KB Output is correct
27 Correct 20 ms 4148 KB Output is correct
28 Correct 23 ms 4220 KB Output is correct
29 Correct 581 ms 101676 KB Output is correct
30 Correct 661 ms 102708 KB Output is correct
31 Correct 702 ms 104364 KB Output is correct
32 Correct 616 ms 104236 KB Output is correct
33 Correct 676 ms 97324 KB Output is correct
34 Correct 684 ms 104364 KB Output is correct
35 Correct 2462 ms 120100 KB Output is correct
36 Correct 2892 ms 114728 KB Output is correct
37 Correct 3312 ms 120108 KB Output is correct