oj.uz

답안 #1072339

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1072339 2024-08-23T17:13:49 Z dwuy The Kingdom of JOIOI (JOI17_joioi) C++14
100 / 100
 1438 ms 184660 KB 
/**         - dwuy -

　　　　　 ／＞　   フ
　　　　　 | 　_　 _|
　 　　　 ／`ミ _x ノ
　　 　 /　　　 　 |
　　　 /　  ヽ　　 ?
　／￣|　　 |　|　|
　| (￣ヽ＿_ヽ_)_)
　＼二つ

**/
#include <bits/stdc++.h>

#define fastIO ios_base::sync_with_stdio(false); cin.tie(NULL)
#define file(a) freopen(a".inp","r",stdin); freopen(a".out", "w",stdout)
#define fi first
#define se second
#define endl "\n"
#define len(s) (int)((s).size())
#define MASK(k)(1LL<<(k))
#define TASK "test"

using namespace std;

typedef tuple<int, int, int> tpiii;
typedef pair<double, double> pdd;
typedef pair<int, int> pii;
typedef long long ll;

const long long OO = 1e18;
const int MOD = 1e9 + 7;
const int INF = 1e9 + 7;
const int MX = 2005;

int n, m;
int mxvalue, mnvalue;
int a[MX][MX];
bool f[MX][MX];
pii f1[MX][MX];
pii f2[MX][MX];
pii f3[MX][MX];
pii f4[MX][MX];

void nhap(){
    cin >> n >> m;
    // cin.ignore();
    // for(int i=1; i<=n; i++){
    //     string s; getline(cin, s); s += ' ';
    //     for(int j=0, t=1; j<len(s); j++) if(s[j] != ' '){
    //         a[i][t] = a[i][t]*10 + s[j] - '0';
    //         if(s[j + 1] == ' ') t++;
    //     }
    // }
    for(int i=1; i<=n; i++){
        for(int j=1; j<=m; j++){
            cin >> a[i][j];
        }
    }
}

bool ok(int mid){
    memset(f, 0, sizeof f);
    /// case 1
    /// X O
    /// O O
    for(int i=1; i<=n; i++){
        for(int j=m; j>=0; j--){
            f[i][j] = f[i][j+1] | ((i == 1 || f[i-1][j]) && f1[i][j].se <= mnvalue + mid && f4[i][j+1].fi >= mxvalue - mid);
        }
    }
    if(f[n][0]) return 1;
    
    memset(f, 0, sizeof f);
    /// case 2
    /// O X
    /// O O
    for(int i=1; i<=n; i++){
        for(int j=1; j<=m+1; j++){
            f[i][j] = f[i][j-1] | ((i == 1 || f[i-1][j]) && f2[i][j].se <= mnvalue + mid && f3[i][j-1].fi >= mxvalue - mid);
        }
    }
    if(f[n][m+1]) return 1;
    
    memset(f, 0, sizeof f);
    /// case 3
    /// O O
    /// X O
    for(int i=n; i>=1; i--){
        for(int j=m; j>=0; j--){
            f[i][j] = f[i][j+1] | ((i == n || f[i+1][j]) && f3[i][j].se <= mnvalue + mid && f2[i][j+1].fi >= mxvalue - mid);
        }
    }
    if(f[1][0]) return 1;

    memset(f, 0, sizeof f);
    /// case 4
    /// O O
    /// O X
    for(int i=n; i>=1; i--){
        for(int j=1; j<=m+1; j++){
            f[i][j] = f[i][j-1] | ((i == n || f[i+1][j]) && f4[i][j].se <= mnvalue + mid && f1[i][j-1].fi >= mxvalue - mid);
        }
    }
    if(f[1][m+1]) return 1;

    return 0;
}

pii combine(pii a, pii b){
    return {min(a.fi, b.fi), max(a.se, b.se)};
}

void solve(){
    for(int i=0; i<=n+1; i++){
        for(int j=0; j<=m+n; j++){
            f1[i][j] = f2[i][j] = f3[i][j] = f4[i][j] = {INF, -INF};
        }
    }
    for(int i=1; i<=n; i++){
        for(int j=1; j<=m; j++){
            f1[i][j] = combine(combine(f1[i-1][j], f1[i][j-1]), {a[i][j], a[i][j]});
        }
        for(int j=m; j>=1; j--){
            f2[i][j] = combine(combine(f2[i-1][j], f2[i][j+1]), {a[i][j], a[i][j]});
        }
    }
    for(int i=n; i>=1; i--){
        for(int j=1; j<=m; j++){
            f3[i][j] = combine(combine(f3[i+1][j], f3[i][j-1]), {a[i][j], a[i][j]});
        }
        for(int j=m; j>=1; j--){
            f4[i][j] = combine(combine(f4[i+1][j], f4[i][j+1]), {a[i][j], a[i][j]});
        }
    }
    
    mnvalue = f1[n][m].first;
    mxvalue = f1[n][m].second;

    int res = -1;
    for(int lo=1, hi=1e9; lo<=hi;){
        int mid = (lo + hi)>>1;
        if(ok(mid)) res = mid, hi = mid - 1;
        else lo = mid + 1;
    }

    cout << res;
}

int32_t main(){
    fastIO;
    //file(TASK);

    nhap();
    solve();

    return 0;
}

Subtask #1
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 6236 KB Output is correct
2 Correct 4 ms 6236 KB Output is correct
3 Correct 8 ms 6312 KB Output is correct
4 Correct 12 ms 8280 KB Output is correct
5 Correct 9 ms 6324 KB Output is correct
6 Correct 10 ms 6236 KB Output is correct
7 Correct 9 ms 6312 KB Output is correct
8 Correct 9 ms 6320 KB Output is correct
9 Correct 10 ms 6316 KB Output is correct
10 Correct 11 ms 6236 KB Output is correct
11 Correct 11 ms 6236 KB Output is correct
12 Correct 11 ms 6164 KB Output is correct
13 Correct 8 ms 6236 KB Output is correct
14 Correct 11 ms 6236 KB Output is correct

Subtask #2
45.0 / 45.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 6236 KB Output is correct
2 Correct 4 ms 6236 KB Output is correct
3 Correct 8 ms 6312 KB Output is correct
4 Correct 12 ms 8280 KB Output is correct
5 Correct 9 ms 6324 KB Output is correct
6 Correct 10 ms 6236 KB Output is correct
7 Correct 9 ms 6312 KB Output is correct
8 Correct 9 ms 6320 KB Output is correct
9 Correct 10 ms 6316 KB Output is correct
10 Correct 11 ms 6236 KB Output is correct
11 Correct 11 ms 6236 KB Output is correct
12 Correct 11 ms 6164 KB Output is correct
13 Correct 8 ms 6236 KB Output is correct
14 Correct 11 ms 6236 KB Output is correct
15 Correct 5 ms 6236 KB Output is correct
16 Correct 11 ms 11868 KB Output is correct
17 Correct 16 ms 12124 KB Output is correct
18 Correct 19 ms 12124 KB Output is correct
19 Correct 23 ms 12124 KB Output is correct
20 Correct 21 ms 11096 KB Output is correct
21 Correct 24 ms 12124 KB Output is correct
22 Correct 26 ms 12124 KB Output is correct
23 Correct 21 ms 13632 KB Output is correct
24 Correct 18 ms 11352 KB Output is correct
25 Correct 21 ms 12124 KB Output is correct
26 Correct 23 ms 12252 KB Output is correct
27 Correct 28 ms 12124 KB Output is correct
28 Correct 25 ms 12124 KB Output is correct

Subtask #3
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 6236 KB Output is correct
2 Correct 4 ms 6236 KB Output is correct
3 Correct 8 ms 6312 KB Output is correct
4 Correct 12 ms 8280 KB Output is correct
5 Correct 9 ms 6324 KB Output is correct
6 Correct 10 ms 6236 KB Output is correct
7 Correct 9 ms 6312 KB Output is correct
8 Correct 9 ms 6320 KB Output is correct
9 Correct 10 ms 6316 KB Output is correct
10 Correct 11 ms 6236 KB Output is correct
11 Correct 11 ms 6236 KB Output is correct
12 Correct 11 ms 6164 KB Output is correct
13 Correct 8 ms 6236 KB Output is correct
14 Correct 11 ms 6236 KB Output is correct
15 Correct 5 ms 6236 KB Output is correct
16 Correct 11 ms 11868 KB Output is correct
17 Correct 16 ms 12124 KB Output is correct
18 Correct 19 ms 12124 KB Output is correct
19 Correct 23 ms 12124 KB Output is correct
20 Correct 21 ms 11096 KB Output is correct
21 Correct 24 ms 12124 KB Output is correct
22 Correct 26 ms 12124 KB Output is correct
23 Correct 21 ms 13632 KB Output is correct
24 Correct 18 ms 11352 KB Output is correct
25 Correct 21 ms 12124 KB Output is correct
26 Correct 23 ms 12252 KB Output is correct
27 Correct 28 ms 12124 KB Output is correct
28 Correct 25 ms 12124 KB Output is correct
29 Correct 851 ms 160876 KB Output is correct
30 Correct 946 ms 167352 KB Output is correct
31 Correct 952 ms 168816 KB Output is correct
32 Correct 1002 ms 168792 KB Output is correct
33 Correct 760 ms 148560 KB Output is correct
34 Correct 1035 ms 169016 KB Output is correct
35 Correct 1284 ms 184660 KB Output is correct
36 Correct 961 ms 178768 KB Output is correct
37 Correct 1438 ms 184656 KB Output is correct