oj.uz

답안 #490742

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
490742 2021-11-29T03:10:35 Z uHyHn The Kingdom of JOIOI (JOI17_joioi) C++14
15 / 100
 218 ms 34832 KB 
#include<bits/stdc++.h>

//IBOW
#define Task "KOJOIOI"
#define DB(X) { cerr << #X << " = " << (X) << '\n'; }
#define DB1(A, _) { cerr << #A << "[" << _ << "] = " << (A[_]) << '\n'; }
#define DB2(A, _, __) { cerr << #A << "[" << _ << "][" << __ << "] = " << (A[_][__]) << '\n'; }
#define DB3(A, _, __, ___) { cerr << #A << "[" << _ << "][" << __ << "][" << ___ << "] = " << (A[_][__][___]) << '\n'; }
#define rep(i, b) for (int i = (1); i <= (b); ++i)
#define REP(i, b) for (int i = (b); i >= (1); --i)
#define pb push_back
#define F first
#define S second
#define all(x) (x).begin(), (x).end()
#define sz(x) (int)(x).size()
#define eb emplace_back

using namespace std;

typedef long long ll;
typedef pair<int, int> ii;
typedef pair<ii, int> iii;
typedef vector<int> vi;
typedef vector<long long> vll;

const int N = 2e3 + 10;
const int inf = 2e9 + 10;
const ll INF = 2e18 + 10;
const int MOD = 1e9 + 7;

int n, m, a[N][N], okA[N][N], okB[N][N], min_value = inf, max_value = 0, suf[N][N], pre[N][N];

bool ok(int v)
{
    fill(&suf[0][0], &suf[0][0] + N * N, 0);
    fill(&pre[0][0], &pre[0][0] + N * N, 0);
    rep(i, n) rep(j, m) okA[i][j] = okB[i][j] = 0;
    rep(i, n) rep(j, m)
    {
        if (a[i][j] - min_value <= v) okA[i][j] = 1;
        if (max_value <= v + a[i][j]) okB[i][j] = 1;
    }
//    rep(i, n) rep(j, m) cout << okA[i][j] << " \n"[j == m];
//    cout << '\n';
//    rep(i, n) rep(j, m) cout << okB[i][j] << " \n"[j == m];
    {
        //phần A ở trên phần B ở dưới
        rep(i, n)
        {
            rep(j, m) pre[i][j] = pre[i][j - 1] + okA[i][j];
            REP(j, m) suf[i][j] = suf[i][j + 1] + okB[i][j];
        }
        {
            //phần A tăng dần
            int past_height = 0;
            rep(i, n)
            {
                bool flag = false;
                if (i == n)
                {
                    rep(j, m)
                    {
                        if (pre[i][j] == j && suf[i][j + 1] == m - j && j >= past_height)
                        {
                            flag = true;
                            past_height = j;
                            break;
                        }
                    }
                } else
                {
                    for (int j = 0; j <= m; ++j)
                    {
                        if (pre[i][j] == j && suf[i][j + 1] == m - j && j >= past_height)
                        {
                            flag = true;
                            past_height = j;
                            break;
                        }
                    }
                }
                if (flag)
                {
                    if (i == n)
                    {
//                        cout << 1 << '\n';
                        return true;
                    }
                    continue;
                }
                else break;
            }
        }
        {
            //Phần A giảm dần
            int past_height = 0;
            REP(i, n)
            {
                bool flag = false;
                if (i == n)
                {
                    rep(j, m)
                    {
                        if (pre[i][j] == j && suf[i][j + 1] == m - j && j >= past_height)
                        {
                            flag = true;
                            past_height = j;
                            break;
                        }
                    }
                } else
                {
                    for (int j = 0; j <= m; ++j)
                    {
                        if (pre[i][j] == j && suf[i][j + 1] == m - j && j >= past_height)
                        {
                            flag = true;
                            past_height = j;
                            break;
                        }
                    }
                }
                if (flag)
                {
                    if (i == 1)
                    {
//                        cout << 2 << '\n';
                        return true;
                    }
                    continue;
                }
                else break;
            }
        }
    }
    {
        //Phần B ở trên phần A ở dưới
        fill(&suf[0][0], &suf[0][0] + N * N, 0);
        fill(&pre[0][0], &pre[0][0] + N * N, 0);
        rep(i, n)
        {
            rep(j, m) pre[i][j] = pre[i][j - 1] + okB[i][j];
            REP(j, m) suf[i][j] = suf[i][j + 1] + okA[i][j];
        }
        {
            //phần B tăng dần
            int past_height = 0;
            rep(i, n)
            {
                bool flag = false;
                if (i == n)
                {
                    rep(j, m)
                    {
                        if (pre[i][j] == j && suf[i][j + 1] == m - j && j >= past_height)
                        {
                            flag = true;
                            past_height = j;
                            break;
                        }
                    }
                } else
                {
                    for (int j = 0; j <= m; ++j)
                    {
                        if (pre[i][j] == j && suf[i][j + 1] == m - j && j >= past_height)
                        {
                            flag = true;
                            past_height = j;
                            break;
                        }
                    }
                }
                if (flag)
                {
                    if (i == n)
                    {
//                        cout << 3 << '\n';
                        return true;
                    }
                    continue;
                }
                else break;
            }
        }
        {
            //Phần B giảm dần
            int past_height = 0;
            REP(i, n)
            {
                bool flag = false;
                if (i == n)
                {
                    rep(j, m)
                    {
                        if (pre[i][j] == j && suf[i][j + 1] == m - j && j >= past_height)
                        {
                            flag = true;
                            past_height = j;
                            break;
                        }
                    }
                } else
                {
                    for (int j = 0; j <= m; ++j)
                    {
                        if (pre[i][j] == j && suf[i][j + 1] == m - j && j >= past_height)
                        {
                            flag = true;
                            past_height = j;
                            break;
                        }
                    }
                }
                if (flag)
                {
                    if (i == 1)
                    {
//                        cout << 4 << '\n';
                        return true;
                    }
                    continue;
                }
                else break;
            }
        }
    }
    return false;
}
void DeoAClamcho()
{
    cin >> n >> m;
    rep(i, n) rep(j, m)
    {
        cin >> a[i][j];
        min_value = min(min_value, a[i][j]);
        max_value = max(max_value, a[i][j]);
    }
    ll L = 1, R = 2e9, ans = 0;
    while (L <= R)
    {
        ll mid = (L + R) / 2;
//        cout << mid << ":\n";
        if (ok(mid)) R = mid - 1, ans = mid;
        else L = mid + 1;
    }
    cout << ans;
}
int32_t main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    if (fopen(Task".inp", "r"))
    {
        freopen(Task".inp", "r", stdin);
//        freopen(Task".out", "w", stdout);
    }
    int t = 1;
    //cin >> t;
    while (t--) DeoAClamcho();
    return 0;
}

Compilation message

joioi.cpp: In function 'int32_t main()':
joioi.cpp:255:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  255 |         freopen(Task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 116 ms 32004 KB Output is correct
2 Correct 113 ms 31948 KB Output is correct
3 Correct 202 ms 32064 KB Output is correct
4 Correct 164 ms 32068 KB Output is correct
5 Correct 205 ms 31960 KB Output is correct
6 Correct 163 ms 31948 KB Output is correct
7 Correct 213 ms 32056 KB Output is correct
8 Correct 176 ms 32068 KB Output is correct
9 Correct 171 ms 32052 KB Output is correct
10 Correct 182 ms 31948 KB Output is correct
11 Correct 218 ms 32064 KB Output is correct
12 Correct 205 ms 32056 KB Output is correct
13 Correct 176 ms 32052 KB Output is correct
14 Correct 206 ms 32048 KB Output is correct

Subtask #2
0 / 45.0

# 결과 실행 시간 메모리 Grader output
1 Correct 116 ms 32004 KB Output is correct
2 Correct 113 ms 31948 KB Output is correct
3 Correct 202 ms 32064 KB Output is correct
4 Correct 164 ms 32068 KB Output is correct
5 Correct 205 ms 31960 KB Output is correct
6 Correct 163 ms 31948 KB Output is correct
7 Correct 213 ms 32056 KB Output is correct
8 Correct 176 ms 32068 KB Output is correct
9 Correct 171 ms 32052 KB Output is correct
10 Correct 182 ms 31948 KB Output is correct
11 Correct 218 ms 32064 KB Output is correct
12 Correct 205 ms 32056 KB Output is correct
13 Correct 176 ms 32052 KB Output is correct
14 Correct 206 ms 32048 KB Output is correct
15 Correct 118 ms 32124 KB Output is correct
16 Correct 131 ms 34776 KB Output is correct
17 Correct 160 ms 34764 KB Output is correct
18 Correct 170 ms 34832 KB Output is correct
19 Incorrect 217 ms 34828 KB Output isn't correct
20 Halted 0 ms 0 KB -

Subtask #3
0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 116 ms 32004 KB Output is correct
2 Correct 113 ms 31948 KB Output is correct
3 Correct 202 ms 32064 KB Output is correct
4 Correct 164 ms 32068 KB Output is correct
5 Correct 205 ms 31960 KB Output is correct
6 Correct 163 ms 31948 KB Output is correct
7 Correct 213 ms 32056 KB Output is correct
8 Correct 176 ms 32068 KB Output is correct
9 Correct 171 ms 32052 KB Output is correct
10 Correct 182 ms 31948 KB Output is correct
11 Correct 218 ms 32064 KB Output is correct
12 Correct 205 ms 32056 KB Output is correct
13 Correct 176 ms 32052 KB Output is correct
14 Correct 206 ms 32048 KB Output is correct
15 Correct 118 ms 32124 KB Output is correct
16 Correct 131 ms 34776 KB Output is correct
17 Correct 160 ms 34764 KB Output is correct
18 Correct 170 ms 34832 KB Output is correct
19 Incorrect 217 ms 34828 KB Output isn't correct
20 Halted 0 ms 0 KB -