oj.uz

Submission #362042

# Submission time Handle Problem Language Result Execution time Memory
362042 2021-02-01T15:58:49 Z Olerinskiy The Kingdom of JOIOI (JOI17_joioi) C++17
100 / 100
 1216 ms 70896 KB 
#include <iostream>
#include <iomanip>
#include <algorithm>
#include <bitset>
#include <set>
#include <unordered_set>
#include <map>
#include <unordered_map>
#include <cmath>
#include <time.h>
#include <random>
#include <string>
#include <cassert> 
#include <vector>
#include <ostream>
#include <istream>
#include <stack>
#include <deque>
#include <queue>
#include <functional>
#include <chrono>
#include <stack>
#include <limits>

using namespace std;

#define int long long
#define pb push_back
#define all(a) (a).begin(), (a).end()
#define pii pair<int, int>
#define ld long double

istream& operator>> (istream& in, pii& b) {
    in >> b.first >> b.second;
    return in;
}

ostream& operator<< (ostream& out, const pii& b) {
    out << "{" << b.first << ", " << b.second << "}";
    return out;
}

template<typename T> ostream& operator<< (ostream& out, const vector<T>& a) {
    for (auto k : a) out << k << " ";
    return out;
}

template <typename T1, typename T2> inline bool chkmin(T1 &x, const T2 &y) {if (x > y) {x = y; return 1;} return 0;}
template <typename T1, typename T2> inline bool chkmax(T1 &x, const T2 &y) {if (x < y) {x = y; return 1;} return 0;}

#ifdef LOCAL
    #define dbg(x) cout << #x << " : " << (x) << endl;
    const long long INF = 1e18;
    // const long long mod = 2600000069;
    // const long long p = 10;
#else
    #define dbg(x) 57
    const long long INF = 1e18;
    // const long long mod = 2600000069;  
    // const long long p = 179;
#endif

const ld PI = 4 * atan(1);

#define time clock() / (double) CLOCKS_PER_SEC

// #pragma GCC optimize("Ofast,no-stack-protector")
// #pragma GCC target("sse,sse2,sse3,sse3,sse4")
// #pragma GCC optimize("unroll-loops")
// #pragma GCC optimize("fast-math")
// #pragma GCC target("avx2")

mt19937 gen(chrono::high_resolution_clock::now().time_since_epoch().count());

#ifdef LOCAL 
    const int N = 550;
#else
    const int N = 2010;
#endif

int n, m;
int a[N][N];
int mn = INF, mx = -INF;

bool check(int d) {
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            if (a[i][j] - mn > d && mx - a[i][j] > d) {
                return 0;
            }
        }
    }
    int pos;
    bool ok, seen;

    // mn in upper left
    ok = 1;
    pos = -1;
    for (int i = n - 1; i >= 0; i--) {
        seen = 0;
        for (int j = 0; j < m; j++) {
            if (a[i][j] - mn <= d && mx - a[i][j] <= d) continue;
            if (a[i][j] - mn <= d) {
                if (chkmax(pos, j) && seen) {
                    ok = 0;
                    break;
                }
            } else {
                if (j <= pos) {
                    ok = 0;
                    break;
                }
                seen = 1;
            }
        }
        if (!ok) break;
    }
    if (ok) return 1;

    // mn in lower left
    ok = 1;
    pos = -1;
    for (int i = 0; i < n; i++) {
        seen = 0;
        for (int j = 0; j < m; j++) {
            if (a[i][j] - mn <= d && mx - a[i][j] <= d) continue;
            if (a[i][j] - mn <= d) {
                if (chkmax(pos, j) && seen) {
                    ok = 0;
                    break;
                }
            } else {
                if (j <= pos) {
                    ok = 0;
                    break;
                }
                seen = 1;
            }
        }
        if (!ok) break;
    }
    if (ok) return 1;

    // mx in upper left
    ok = 1;
    pos = -1;
    for (int i = n - 1; i >= 0; i--) {
        seen = 0;
        for (int j = 0; j < m; j++) {
            if (a[i][j] - mn <= d && mx - a[i][j] <= d) continue;
            if (mx - a[i][j] <= d) {
                if (chkmax(pos, j) && seen) {
                    ok = 0;
                    break;
                }
            } else {
                if (j <= pos) {
                    ok = 0;
                    break;
                }
            }
        }
        if (!ok) {
            break;
        }
    }
    if (ok) return 1;

    // mx in lower left
    ok = 1;
    pos = -1;
    for (int i = 0; i < n; i++) {
        seen = 0;
        for (int j = 0; j < m; j++) {
            if (a[i][j] - mn <= d && mx - a[i][j] <= d) continue;
            if (mx - a[i][j] <= d) {
                if (chkmax(pos, j) && seen) {
                    ok = 0;
                    break;
                }
            } else {
                if (j <= pos) {
                    ok = 0;
                    break;
                }
            }
        }
        if (!ok) break;
    }
    return ok;
}

signed main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin >> n >> m;
    int sz = 0;
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            cin >> a[i][j];
            chkmin(mn, a[i][j]);
            chkmax(mx, a[i][j]);
        }
    }
    int l = -1, r = mx - mn;
    while (r - l > 1) {
        int mid = (l + r) / 2;
        if (check(mid)) r = mid;
        else l = mid;
    }
    cout << r << "\n";
}
/*
4 4
1 12 6 11 
11 10 2 14 
10 1 9 20 
4 17 19 10
-> 11

8 6
23 23 10 11 16 21 
15 26 19 28 19 20 
25 26 28 16 15 11 
11 8 19 11 15 24 
14 19 15 14 24 11 
10 8 11 7 6 14
23 5 19 23 17 17 
18 11 21 14 20 16
-> 18
*/

Compilation message

joioi.cpp: In function 'int main()':
joioi.cpp:198:9: warning: unused variable 'sz' [-Wunused-variable]
  198 |     int sz = 0;
      |         ^~

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 4 ms 1388 KB Output is correct
17 Correct 7 ms 1516 KB Output is correct
18 Correct 6 ms 1772 KB Output is correct
19 Correct 9 ms 1772 KB Output is correct
20 Correct 9 ms 1516 KB Output is correct
21 Correct 10 ms 1900 KB Output is correct
22 Correct 8 ms 1900 KB Output is correct
23 Correct 12 ms 1900 KB Output is correct
24 Correct 6 ms 1644 KB Output is correct
25 Correct 14 ms 1900 KB Output is correct
26 Correct 9 ms 1900 KB Output is correct
27 Correct 10 ms 1900 KB Output is correct
28 Correct 10 ms 1900 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 4 ms 1388 KB Output is correct
17 Correct 7 ms 1516 KB Output is correct
18 Correct 6 ms 1772 KB Output is correct
19 Correct 9 ms 1772 KB Output is correct
20 Correct 9 ms 1516 KB Output is correct
21 Correct 10 ms 1900 KB Output is correct
22 Correct 8 ms 1900 KB Output is correct
23 Correct 12 ms 1900 KB Output is correct
24 Correct 6 ms 1644 KB Output is correct
25 Correct 14 ms 1900 KB Output is correct
26 Correct 9 ms 1900 KB Output is correct
27 Correct 10 ms 1900 KB Output is correct
28 Correct 10 ms 1900 KB Output is correct
29 Correct 559 ms 52332 KB Output is correct
30 Correct 632 ms 53484 KB Output is correct
31 Correct 819 ms 55020 KB Output is correct
32 Correct 549 ms 55020 KB Output is correct
33 Correct 385 ms 47980 KB Output is correct
34 Correct 698 ms 55148 KB Output is correct
35 Correct 802 ms 70764 KB Output is correct
36 Correct 598 ms 65516 KB Output is correct
37 Correct 1216 ms 70896 KB Output is correct