oj.uz

Submission #1025046

# Submission time Handle Problem Language Result Execution time Memory
1025046 2024-07-16T14:44:41 Z phong The Kingdom of JOIOI (JOI17_joioi) C++17
100 / 100
 1923 ms 133332 KB 
#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,fma")
#pragma GCC optimize("unroll-loops")
#include <bits/stdc++.h>

#define ll long long
//#define int long long
const int nmax = 2e3 + 5;
const int lg = 18;
const int base = 311;
const int M = 5e6;
const ll oo = 1e9 + 1;
const int mod = 987654321;
#define fi first
#define se second
#define endl "\n"
#define debug(a, m) for(int j = 1; j <= n; ++j) cout << a[j] << ' ';cout << endl;
#define pii pair<ll, int>

using namespace std;

int n, m, a[nmax][nmax], mx = -1;
int pos[nmax], pre[nmax][nmax][2], suf[nmax][nmax][2];
int tmp[nmax][nmax];

bool check(int mid){
    for(int k = 1; k <= 4; ++k){
        for(int i = 1; i <= n; ++i){
            pre[i][0][0] = suf[i][m + 1][0] = oo;
            pre[i][0][1] = suf[i][m + 1][1] = -oo;
            for(int j = 1; j <= m; ++j){
                pre[i][j][0] = min(pre[i][j - 1][0], a[i][j]);
                pre[i][j][1] = max(pre[i][j - 1][1], a[i][j]);
            }
            for(int j = m; j >= 1; --j){
                suf[i][j][0] = min(suf[i][j + 1][0], a[i][j]);
                suf[i][j][1] = max(suf[i][j + 1][1], a[i][j]);
            }
        }
        for(int i = 1; i <= n; ++i){
            pos[i] = -1;
            for(int j = 1; j <= m; ++j){
                if(mx - mid > a[i][j]){
                    pos[i] = j;
                }
            }
//            cout << pos[i] << ' ';
        }
//        return 0;
        int ma_1 = -oo, mi_1 = oo, ma_2 = -oo, mi_2 = oo, idx = 0;
        for(int i = 1; i <= n; ++i){
            idx = max(idx, pos[i]);
            ma_1 = max(ma_1, pre[i][idx][1]);
            ma_2 = max(ma_2, suf[i][idx + 1][1]);
            mi_1 = min(mi_1, pre[i][idx][0]);
            mi_2 = min(mi_2, suf[i][idx + 1][0]);
        }
        if(ma_1 - mi_1 <= mid && ma_2 - mi_2 <= mid) return 1;

        ma_1 = -oo, mi_1 = oo, ma_2 = -oo, mi_2 = oo, idx = 0;
        for(int i = n; i >= 1; --i){
            idx = max(idx, pos[i]);
            ma_1 = max(ma_1, pre[i][idx][1]);
            ma_2 = max(ma_2, suf[i][idx + 1][1]);
            mi_1 = min(mi_1, pre[i][idx][0]);
            mi_2 = min(mi_2, suf[i][idx + 1][0]);
        }
//        cout <<ma_1 << ' ' <<mi_1 << ' ' << ma_2 << ' ' << mi_2 << ' ' << mi;
//        return 0;
        if(ma_1 - mi_1 <= mid && ma_2 - mi_2 <= mid) return 1;
        for(int i = 1; i <= n; ++i){
            for(int j = 1; j <= m; ++j){
                tmp[j][n - i + 1] = a[i][j];
            }
        }
        swap(n, m);
        for(int i = 1; i <= n; ++i){
            for(int j = 1; j <= m; ++j){
                a[i][j] = tmp[i][j];
//                cout << a[i][j] << ' ';
            }
//            cout << endl;
        }
//        return 0;
    }
    return 0;

}
main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL), cout.tie(NULL);
//    freopen("code.inp", "r", stdin);
//    freopen("code.out", "w", stdout);
    cin >> n >> m;
    for(int i = 1; i<= n; ++i){
        for(int j = 1; j <= m; ++j){
            cin >> a[i][j];
            mx = max(mx, a[i][j]);
        }
    }
//    vector<int> nen;
//    for(int i = 1; i <= n; ++i){
//        for(int j = 1; j <= m; ++j){
//            nen.push_back(mx - a[i][j]);
//        }
//    }
//    sort(nen.begin(), nen.end());
//    nen.erase(unique(nen.begin(), nen.end()), nen.end());

//    cout <<
//check(11);
    int l = 1, r= 1e9, kq = -1;
    while(l <= r){
        int mid = r + l >> 1;
        if(check(mid)){
            kq = mid;
            r = mid - 1;
        }
        else l= mid + 1;
    }
    cout << kq;
//    cout << check(11);
//    for(int i =1; i <= 100; ++i){
//        cout << i << ' ' << check(i) << endl;
//    }
}
/*
4 4
1 12 6 11
11 10 2 14
10 1 9 20
4 17 19 10

*/

Compilation message

joioi.cpp:89:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   89 | main(){
      | ^~~~
joioi.cpp: In function 'int main()':
joioi.cpp:114:21: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  114 |         int mid = r + l >> 1;
      |                   ~~^~~

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 600 KB Output is correct
2 Correct 1 ms 604 KB Output is correct
3 Correct 0 ms 604 KB Output is correct
4 Correct 0 ms 604 KB Output is correct
5 Correct 0 ms 604 KB Output is correct
6 Correct 0 ms 604 KB Output is correct
7 Correct 0 ms 604 KB Output is correct
8 Correct 0 ms 604 KB Output is correct
9 Correct 0 ms 464 KB Output is correct
10 Correct 0 ms 604 KB Output is correct
11 Correct 0 ms 604 KB Output is correct
12 Correct 0 ms 604 KB Output is correct
13 Correct 0 ms 604 KB Output is correct
14 Correct 0 ms 604 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 600 KB Output is correct
2 Correct 1 ms 604 KB Output is correct
3 Correct 0 ms 604 KB Output is correct
4 Correct 0 ms 604 KB Output is correct
5 Correct 0 ms 604 KB Output is correct
6 Correct 0 ms 604 KB Output is correct
7 Correct 0 ms 604 KB Output is correct
8 Correct 0 ms 604 KB Output is correct
9 Correct 0 ms 464 KB Output is correct
10 Correct 0 ms 604 KB Output is correct
11 Correct 0 ms 604 KB Output is correct
12 Correct 0 ms 604 KB Output is correct
13 Correct 0 ms 604 KB Output is correct
14 Correct 0 ms 604 KB Output is correct
15 Correct 2 ms 3676 KB Output is correct
16 Correct 6 ms 4592 KB Output is correct
17 Correct 9 ms 4700 KB Output is correct
18 Correct 10 ms 4700 KB Output is correct
19 Correct 10 ms 4900 KB Output is correct
20 Correct 12 ms 4824 KB Output is correct
21 Correct 15 ms 5004 KB Output is correct
22 Correct 14 ms 4956 KB Output is correct
23 Correct 14 ms 5016 KB Output is correct
24 Correct 12 ms 4964 KB Output is correct
25 Correct 15 ms 4956 KB Output is correct
26 Correct 13 ms 4876 KB Output is correct
27 Correct 15 ms 4956 KB Output is correct
28 Correct 15 ms 4952 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 600 KB Output is correct
2 Correct 1 ms 604 KB Output is correct
3 Correct 0 ms 604 KB Output is correct
4 Correct 0 ms 604 KB Output is correct
5 Correct 0 ms 604 KB Output is correct
6 Correct 0 ms 604 KB Output is correct
7 Correct 0 ms 604 KB Output is correct
8 Correct 0 ms 604 KB Output is correct
9 Correct 0 ms 464 KB Output is correct
10 Correct 0 ms 604 KB Output is correct
11 Correct 0 ms 604 KB Output is correct
12 Correct 0 ms 604 KB Output is correct
13 Correct 0 ms 604 KB Output is correct
14 Correct 0 ms 604 KB Output is correct
15 Correct 2 ms 3676 KB Output is correct
16 Correct 6 ms 4592 KB Output is correct
17 Correct 9 ms 4700 KB Output is correct
18 Correct 10 ms 4700 KB Output is correct
19 Correct 10 ms 4900 KB Output is correct
20 Correct 12 ms 4824 KB Output is correct
21 Correct 15 ms 5004 KB Output is correct
22 Correct 14 ms 4956 KB Output is correct
23 Correct 14 ms 5016 KB Output is correct
24 Correct 12 ms 4964 KB Output is correct
25 Correct 15 ms 4956 KB Output is correct
26 Correct 13 ms 4876 KB Output is correct
27 Correct 15 ms 4956 KB Output is correct
28 Correct 15 ms 4952 KB Output is correct
29 Correct 1230 ms 116572 KB Output is correct
30 Correct 1162 ms 116048 KB Output is correct
31 Correct 1334 ms 117628 KB Output is correct
32 Correct 985 ms 117744 KB Output is correct
33 Correct 879 ms 114116 KB Output is correct
34 Correct 1036 ms 117844 KB Output is correct
35 Correct 1548 ms 133332 KB Output is correct
36 Correct 1104 ms 127824 KB Output is correct
37 Correct 1923 ms 133328 KB Output is correct