oj.uz

답안 #490741

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
490741 2021-11-29T03:09:02 Z uHyHn The Kingdom of JOIOI (JOI17_joioi) C++14
15 / 100
 226 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]);
    }
    int L = 1, R = 1e9, ans = 0;
    while (L <= R)
    {
        int 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 32016 KB Output is correct
2 Correct 117 ms 31948 KB Output is correct
3 Correct 202 ms 31948 KB Output is correct
4 Correct 163 ms 32040 KB Output is correct
5 Correct 208 ms 32064 KB Output is correct
6 Correct 157 ms 32052 KB Output is correct
7 Correct 210 ms 32060 KB Output is correct
8 Correct 178 ms 32068 KB Output is correct
9 Correct 175 ms 32168 KB Output is correct
10 Correct 171 ms 32052 KB Output is correct
11 Correct 226 ms 32052 KB Output is correct
12 Correct 212 ms 32068 KB Output is correct
13 Correct 172 ms 32056 KB Output is correct
14 Correct 205 ms 32048 KB Output is correct

Subtask #2
0 / 45.0

# 결과 실행 시간 메모리 Grader output
1 Correct 116 ms 32016 KB Output is correct
2 Correct 117 ms 31948 KB Output is correct
3 Correct 202 ms 31948 KB Output is correct
4 Correct 163 ms 32040 KB Output is correct
5 Correct 208 ms 32064 KB Output is correct
6 Correct 157 ms 32052 KB Output is correct
7 Correct 210 ms 32060 KB Output is correct
8 Correct 178 ms 32068 KB Output is correct
9 Correct 175 ms 32168 KB Output is correct
10 Correct 171 ms 32052 KB Output is correct
11 Correct 226 ms 32052 KB Output is correct
12 Correct 212 ms 32068 KB Output is correct
13 Correct 172 ms 32056 KB Output is correct
14 Correct 205 ms 32048 KB Output is correct
15 Correct 118 ms 32120 KB Output is correct
16 Correct 130 ms 34780 KB Output is correct
17 Correct 157 ms 34832 KB Output is correct
18 Correct 182 ms 34824 KB Output is correct
19 Incorrect 204 ms 34832 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 32016 KB Output is correct
2 Correct 117 ms 31948 KB Output is correct
3 Correct 202 ms 31948 KB Output is correct
4 Correct 163 ms 32040 KB Output is correct
5 Correct 208 ms 32064 KB Output is correct
6 Correct 157 ms 32052 KB Output is correct
7 Correct 210 ms 32060 KB Output is correct
8 Correct 178 ms 32068 KB Output is correct
9 Correct 175 ms 32168 KB Output is correct
10 Correct 171 ms 32052 KB Output is correct
11 Correct 226 ms 32052 KB Output is correct
12 Correct 212 ms 32068 KB Output is correct
13 Correct 172 ms 32056 KB Output is correct
14 Correct 205 ms 32048 KB Output is correct
15 Correct 118 ms 32120 KB Output is correct
16 Correct 130 ms 34780 KB Output is correct
17 Correct 157 ms 34832 KB Output is correct
18 Correct 182 ms 34824 KB Output is correct
19 Incorrect 204 ms 34832 KB Output isn't correct
20 Halted 0 ms 0 KB -