oj.uz

Submission #1046824

# Submission time Handle Problem Language Result Execution time Memory
1046824 2024-08-07T03:08:20 Z underwaterkillerwhale The Kingdom of JOIOI (JOI17_joioi) C++17
100 / 100
 2397 ms 64308 KB 
#include <bits/stdc++.h>
#define ll long long
#define rep(i,m,n) for(int i=(m); i<=(n); i++)
#define reb(i,m,n) for(int i=(m); i>=(n); i--)
#define MP make_pair
#define fs first
#define se second
#define bit(msk, i) ((msk >> i) & 1)
#define iter(id, v) for(auto id : v)
#define SZ(v) (int)v.size()
#define ALL(v) v.begin(),v.end()

using namespace std;

mt19937_64 rd(chrono :: steady_clock :: now ().time_since_epoch().count());
ll Rand (ll l, ll r) { return uniform_int_distribution<ll> (l, r) (rd); }

const int N = 2e3 + 7;
const int Mod = 1e9 + 7;
const int INF = 1e9 + 7;
const ll BASE = 137;

int dx[4] = {1, -1, 0, 0};
int dy[4] = {0, 0, 1, -1};

int n, m;
int mn;
int a[N][N];
bool dd[N][N], dd2[N][N];
bool prec[N][N], sufc[N][N];

bool check (int X) {
    rep (i, 1, n)
    rep (j, 1, m) dd[i][j] = 0;
    static queue<pair<int,int>> Q;
    rep (i, 1, n)
    rep (j, 1, m) if (a[i][j] == mn) Q.push({i, j});
    while (!Q.empty()) {
        pair<int,int> u = Q.front();
        Q.pop();
        rep (k, 0, 3) {
            int ni = u.fs + dx[k], nj = u.se + dy[k];
            if (ni >= 1 && ni <= n && nj >= 1 && nj <= m && dd[ni][nj] == 0 && a[ni][nj] <= mn + X) {
                dd[ni][nj] = 1;
                Q.push({ni, nj});
            }
        }
    }
    {
        rep (i, 1, n)
        rep (j, 1, m) dd2[i][j] = 0;
        int mnR = n;
        rep (j, 1, m) {
            rep (i, 1, mnR) {
                if (dd[i][j] == 0) {
                    mnR = i - 1;
                    break;
                }
                else dd2[i][j] = 1;
            }
        }
//        rep (i, 1, n)
//        rep (j, 1, m) cout << dd2[i][j] <<" \n"[j == m];
        int mn1 = INF, mn2 = INF, mx1 = 0, mx2 = 0;
        rep (i, 1, n) rep (j, 1, m) if (dd2[i][j]) {
            mn1 = min(mn1, a[i][j]);
            mx1 = max(mx1, a[i][j]);
        }
        else {
            mx2 = max(mx2, a[i][j]);
            mn2 = min(mn2, a[i][j]);
        }
//        cout << max(mx2 - mn2, mx1 - mn1) <<"\n";
        if (max(mx2 - mn2, mx1 - mn1) <= X) {
                return 1;
        }
    }
    {
        rep (i, 1, n)
        rep (j, 1, m) dd2[i][j] = 0;
        int mnR = 1;
        reb (j, m, 1) {
            reb (i, n, mnR) {
                if (dd[i][j] == 0) {
                    mnR = i + 1;
                    break;
                }
                else dd2[i][j] = 1;
            }
        }
        int mn1 = INF, mn2 = INF, mx1 = 0, mx2 = 0;
        rep (i, 1, n) rep (j, 1, m) if (dd2[i][j]) {
            mn1 = min(mn1, a[i][j]);
            mx1 = max(mx1, a[i][j]);
        }
        else {
            mx2 = max(mx2, a[i][j]);
            mn2 = min(mn2, a[i][j]);
        }
//        cout << mx2 <<" "<<mn2 <<"\n";
        if (max(mx2 - mn2, mx1 - mn1) <= X) return 1;
    }
    {
        rep (i, 1, n)
        rep (j, 1, m) dd2[i][j] = 0;
        int mnR = n;
        reb (j, m, 1) {
            rep (i, 1, mnR) {
                if (dd[i][j] == 0) {
                    mnR = i - 1;
                    break;
                }
                else dd2[i][j] = 1;
            }
        }
        int mn1 = INF, mn2 = INF, mx1 = 0, mx2 = 0;
        rep (i, 1, n) rep (j, 1, m) if (dd2[i][j]) {
            mn1 = min(mn1, a[i][j]);
            mx1 = max(mx1, a[i][j]);
        }
        else {
            mx2 = max(mx2, a[i][j]);
            mn2 = min(mn2, a[i][j]);
        }
//        cout << mx2 <<" "<<mn2 <<"\n";
        if (max(mx2 - mn2, mx1 - mn1) <= X) return 1;
    }
    {
        rep (i, 1, n)
        rep (j, 1, m) dd2[i][j] = 0;
        int mnR = 1;
        rep (j, 1, m) {
            reb(i, n, mnR) {
                if (dd[i][j] == 0) {
                    mnR = i + 1;
                    break;
                }
                else dd2[i][j] = 1;
            }
        }
        int mn1 = INF, mn2 = INF, mx1 = 0, mx2 = 0;
        rep (i, 1, n) rep (j, 1, m) if (dd2[i][j]) {
            mn1 = min(mn1, a[i][j]);
            mx1 = max(mx1, a[i][j]);
        }
        else {
            mx2 = max(mx2, a[i][j]);
            mn2 = min(mn2, a[i][j]);
        }
//        cout << mx2 <<" "<<mn2 <<"\n";
        if (max(mx2 - mn2, mx1 - mn1) <= X) return 1;
    }
    return 0;

}

void solution () {
    cin >> n >> m;
    rep (i, 1, n)
    rep (j, 1, m)
        cin >> a[i][j];
    mn = INF;
    rep (i, 1, n)
    rep (j, 1, m) {
        if (a[i][j] < mn) mn = a[i][j];
    }
//    cout << check(18) <<"\n";
//    return;
    int lf = 0, rt = 1e9;
    while (lf < rt) {
         int mid = lf + rt >> 1;
         if (check(mid)) rt = mid;
         else lf = mid + 1;
    }
    cout << lf <<"\n";
}


#define file(name) freopen(name".inp","r",stdin); \
freopen(name".out","w",stdout);
int main () {
//    file("c");
    ios_base :: sync_with_stdio(false); cin.tie(0); cout.tie(0);
    int num_Test = 1;
//    cin >> num_Test;
    while (num_Test--)
        solution();
}
/*
no bug challenge +2
4
1 2 3 4
2
0 3
2 1
*/

Compilation message

joioi.cpp: In function 'void solution()':
joioi.cpp:171:23: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  171 |          int mid = lf + rt >> 1;
      |                    ~~~^~~~

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 1 ms 6492 KB Output is correct
5 Correct 1 ms 6608 KB Output is correct
6 Correct 0 ms 6492 KB Output is correct
7 Correct 1 ms 6492 KB Output is correct
8 Correct 1 ms 6492 KB Output is correct
9 Correct 1 ms 6492 KB Output is correct
10 Correct 1 ms 6492 KB Output is correct
11 Correct 0 ms 6492 KB Output is correct
12 Correct 0 ms 6492 KB Output is correct
13 Correct 1 ms 6492 KB Output is correct
14 Correct 1 ms 6492 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 1 ms 6492 KB Output is correct
5 Correct 1 ms 6608 KB Output is correct
6 Correct 0 ms 6492 KB Output is correct
7 Correct 1 ms 6492 KB Output is correct
8 Correct 1 ms 6492 KB Output is correct
9 Correct 1 ms 6492 KB Output is correct
10 Correct 1 ms 6492 KB Output is correct
11 Correct 0 ms 6492 KB Output is correct
12 Correct 0 ms 6492 KB Output is correct
13 Correct 1 ms 6492 KB Output is correct
14 Correct 1 ms 6492 KB Output is correct
15 Correct 2 ms 6492 KB Output is correct
16 Correct 23 ms 8796 KB Output is correct
17 Correct 18 ms 8796 KB Output is correct
18 Correct 13 ms 8948 KB Output is correct
19 Correct 14 ms 8772 KB Output is correct
20 Correct 18 ms 8920 KB Output is correct
21 Correct 20 ms 9052 KB Output is correct
22 Correct 14 ms 9052 KB Output is correct
23 Correct 13 ms 9048 KB Output is correct
24 Correct 11 ms 9020 KB Output is correct
25 Correct 16 ms 9052 KB Output is correct
26 Correct 20 ms 9064 KB Output is correct
27 Correct 19 ms 9052 KB Output is correct
28 Correct 19 ms 9064 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 1 ms 6492 KB Output is correct
5 Correct 1 ms 6608 KB Output is correct
6 Correct 0 ms 6492 KB Output is correct
7 Correct 1 ms 6492 KB Output is correct
8 Correct 1 ms 6492 KB Output is correct
9 Correct 1 ms 6492 KB Output is correct
10 Correct 1 ms 6492 KB Output is correct
11 Correct 0 ms 6492 KB Output is correct
12 Correct 0 ms 6492 KB Output is correct
13 Correct 1 ms 6492 KB Output is correct
14 Correct 1 ms 6492 KB Output is correct
15 Correct 2 ms 6492 KB Output is correct
16 Correct 23 ms 8796 KB Output is correct
17 Correct 18 ms 8796 KB Output is correct
18 Correct 13 ms 8948 KB Output is correct
19 Correct 14 ms 8772 KB Output is correct
20 Correct 18 ms 8920 KB Output is correct
21 Correct 20 ms 9052 KB Output is correct
22 Correct 14 ms 9052 KB Output is correct
23 Correct 13 ms 9048 KB Output is correct
24 Correct 11 ms 9020 KB Output is correct
25 Correct 16 ms 9052 KB Output is correct
26 Correct 20 ms 9064 KB Output is correct
27 Correct 19 ms 9052 KB Output is correct
28 Correct 19 ms 9064 KB Output is correct
29 Correct 1894 ms 47256 KB Output is correct
30 Correct 2000 ms 46932 KB Output is correct
31 Correct 1644 ms 48820 KB Output is correct
32 Correct 1871 ms 48724 KB Output is correct
33 Correct 1313 ms 45136 KB Output is correct
34 Correct 2116 ms 48720 KB Output is correct
35 Correct 1900 ms 64204 KB Output is correct
36 Correct 1090 ms 59228 KB Output is correct
37 Correct 2397 ms 64308 KB Output is correct