oj.uz

Submission #995075

# Submission time Handle Problem Language Result Execution time Memory
995075 2024-06-08T12:10:27 Z _callmelucian The Kingdom of JOIOI (JOI17_joioi) C++14
60 / 100
 756 ms 262144 KB 
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef long double ld;
typedef pair<ll,ll> pl;
typedef pair<int,int> pii;
typedef tuple<int,int,int> tt;

#define all(a) a.begin(), a.end()
#define filter(a) a.erase(unique(all(a)), a.end())

vector<int> cmp;

int getID (int targ) {
    return lower_bound(all(cmp), targ) - cmp.begin();
}

const int mn = 4e6 + 6;
int lo[2002][2002], hi[2002][2002], loCol[2002][2002], hiCol[2002][2002], hiRow[2002][2002];
int calcLo[mn], calcHi[mn], bound[2002];
vector<pii> contain[mn];

bool ok (int i, int j) {
    return j < bound[i];
}

bool check (int delta) {
    int pos = -1, curLo = INT_MAX, curHi = INT_MIN;
    for (int k = 0; k < cmp.size(); k++) {
        while (pos + 1 < cmp.size() && cmp[pos + 1] < cmp[k] - delta) {
            pos++;
            for (auto [row, col] : contain[pos]) {
                curLo = min(curLo, lo[row][col]);
                curHi = max(curHi, hi[row][col]);
            }
        }
        int cHi = max(calcHi[k], curHi);
        int cLo = min(calcLo[k], curLo);
        if (cHi != INT_MIN && cLo != INT_MAX && cHi - cLo <= delta) return 1;
    }
    return 0;
}

int solve (vector<vector<int>> &vec, int n, int m) {
    for (int j = 1; j <= m; j++) {
        int curLo = INT_MAX, curHi = INT_MIN;
        for (int i = n; i >= 1; i--) {
            loCol[i][j] = curLo = min(curLo, vec[i][j]);
            hiCol[i][j] = curHi = max(curHi, vec[i][j]);
        }
    }

    for (int i = 1; i <= n; i++) {
        int curLo = INT_MAX, curHi = INT_MIN;
        //lo[i][0] = curLo, hi[i][0] = curHi;
        for (int j = 1; j <= m; j++) {
            lo[i][j] = curLo = min(curLo, loCol[i][j]);
            hi[i][j] = curHi = max(curHi, hiCol[i][j]);
        }
        curHi = INT_MIN;
        for (int j = m; j >= 1; j--)
            hiRow[i][j] = curHi = max(curHi, vec[i][j]);
    }

    priority_queue<tt> pqLo, pqHi;
    for (int i = 1; i <= n; i++) {
        bound[i] = m + 1;
        for (int j = 1; j <= m; j++) {
            pqLo.push(make_tuple(-lo[i][j], i, j));
            pqHi.push(make_tuple( hi[i][j], i, j));
            contain[getID(vec[i][j])].push_back({i, j});
        }
    }

    for (int k = 0; k < cmp.size(); k++) {
        for (auto [row, col] : contain[k])
            while (bound[row] > 1 && hiRow[row][bound[row] - 1] <= cmp[k]) bound[row]--;
        while (pqLo.size()) {
            int val, i, j; tie(val, i, j) = pqLo.top();
            if (ok(i, j)) break;
            else pqLo.pop();
        }
        while (pqHi.size()) {
            int val, i, j; tie(val, i, j) = pqHi.top();
            if (ok(i, j)) break;
            else pqHi.pop();
        }

        calcLo[k] = (pqLo.size() ? -get<0>(pqLo.top()) : INT_MAX);
        calcHi[k] = (pqHi.size() ?  get<0>(pqHi.top()) : INT_MIN);
    }

    int ans = 0;
    if (!check(0)) {
        for (int i = 29; i >= 0; i--) {
            int mask = ans | (1 << i);
            if (!check(mask)) ans |= (1 << i);
        }
        ans++;
    }

    for (int k = 0; k < cmp.size(); k++)
        contain[k].clear();
    return ans;
}

int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);

    int n, m; cin >> n >> m;
    vector<vector<int>> vec(n + 1, vector<int>(m + 1));
    vector<vector<int>> rot(m + 1, vector<int>(n + 1));

    //cmp.push_back(0);
    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= m; j++) {
            cin >> vec[i][j];
            rot[j][n - i + 1] = vec[i][j];
            cmp.push_back(vec[i][j]);
        }
    }
    sort(all(cmp)); filter(cmp);

    cout << min(solve(vec, n, m), solve(rot, m, n));

    return 0;
}

Compilation message

joioi.cpp: In function 'bool check(int)':
joioi.cpp:30:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 |     for (int k = 0; k < cmp.size(); k++) {
      |                     ~~^~~~~~~~~~~~
joioi.cpp:31:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |         while (pos + 1 < cmp.size() && cmp[pos + 1] < cmp[k] - delta) {
      |                ~~~~~~~~^~~~~~~~~~~~
joioi.cpp:33:23: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   33 |             for (auto [row, col] : contain[pos]) {
      |                       ^
joioi.cpp: In function 'int solve(std::vector<std::vector<int> >&, int, int)':
joioi.cpp:76:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   76 |     for (int k = 0; k < cmp.size(); k++) {
      |                     ~~^~~~~~~~~~~~
joioi.cpp:77:19: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   77 |         for (auto [row, col] : contain[k])
      |                   ^
joioi.cpp:103:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  103 |     for (int k = 0; k < cmp.size(); k++)
      |                     ~~^~~~~~~~~~~~

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 107096 KB Output is correct
2 Correct 18 ms 107096 KB Output is correct
3 Correct 18 ms 107356 KB Output is correct
4 Correct 18 ms 107172 KB Output is correct
5 Correct 17 ms 107356 KB Output is correct
6 Correct 16 ms 107188 KB Output is correct
7 Correct 17 ms 107096 KB Output is correct
8 Correct 16 ms 107356 KB Output is correct
9 Correct 19 ms 107356 KB Output is correct
10 Correct 18 ms 107288 KB Output is correct
11 Correct 18 ms 107356 KB Output is correct
12 Correct 17 ms 107356 KB Output is correct
13 Correct 16 ms 107352 KB Output is correct
14 Correct 17 ms 107356 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 107096 KB Output is correct
2 Correct 18 ms 107096 KB Output is correct
3 Correct 18 ms 107356 KB Output is correct
4 Correct 18 ms 107172 KB Output is correct
5 Correct 17 ms 107356 KB Output is correct
6 Correct 16 ms 107188 KB Output is correct
7 Correct 17 ms 107096 KB Output is correct
8 Correct 16 ms 107356 KB Output is correct
9 Correct 19 ms 107356 KB Output is correct
10 Correct 18 ms 107288 KB Output is correct
11 Correct 18 ms 107356 KB Output is correct
12 Correct 17 ms 107356 KB Output is correct
13 Correct 16 ms 107352 KB Output is correct
14 Correct 17 ms 107356 KB Output is correct
15 Correct 20 ms 117596 KB Output is correct
16 Correct 40 ms 120136 KB Output is correct
17 Correct 60 ms 121236 KB Output is correct
18 Correct 58 ms 121236 KB Output is correct
19 Correct 64 ms 121260 KB Output is correct
20 Correct 52 ms 120840 KB Output is correct
21 Correct 61 ms 121152 KB Output is correct
22 Correct 64 ms 121236 KB Output is correct
23 Correct 60 ms 121232 KB Output is correct
24 Correct 57 ms 120956 KB Output is correct
25 Correct 62 ms 121232 KB Output is correct
26 Correct 67 ms 121236 KB Output is correct
27 Correct 61 ms 121232 KB Output is correct
28 Correct 61 ms 121228 KB Output is correct

Subtask #3
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 107096 KB Output is correct
2 Correct 18 ms 107096 KB Output is correct
3 Correct 18 ms 107356 KB Output is correct
4 Correct 18 ms 107172 KB Output is correct
5 Correct 17 ms 107356 KB Output is correct
6 Correct 16 ms 107188 KB Output is correct
7 Correct 17 ms 107096 KB Output is correct
8 Correct 16 ms 107356 KB Output is correct
9 Correct 19 ms 107356 KB Output is correct
10 Correct 18 ms 107288 KB Output is correct
11 Correct 18 ms 107356 KB Output is correct
12 Correct 17 ms 107356 KB Output is correct
13 Correct 16 ms 107352 KB Output is correct
14 Correct 17 ms 107356 KB Output is correct
15 Correct 20 ms 117596 KB Output is correct
16 Correct 40 ms 120136 KB Output is correct
17 Correct 60 ms 121236 KB Output is correct
18 Correct 58 ms 121236 KB Output is correct
19 Correct 64 ms 121260 KB Output is correct
20 Correct 52 ms 120840 KB Output is correct
21 Correct 61 ms 121152 KB Output is correct
22 Correct 64 ms 121236 KB Output is correct
23 Correct 60 ms 121232 KB Output is correct
24 Correct 57 ms 120956 KB Output is correct
25 Correct 62 ms 121232 KB Output is correct
26 Correct 67 ms 121236 KB Output is correct
27 Correct 61 ms 121232 KB Output is correct
28 Correct 61 ms 121228 KB Output is correct
29 Runtime error 756 ms 262144 KB Execution killed with signal 9
30 Halted 0 ms 0 KB -