oj.uz

Submission #1028652

# Submission time Handle Problem Language Result Execution time Memory
1028652 2024-07-20T06:44:21 Z onbert Rectangles (IOI19_rect) C++17
10 / 100
 1738 ms 725092 KB 
#include "rect.h"
#include <bits/stdc++.h>
using namespace std;
#define ll long long
struct range {
    int l, r, mx;
};
bool cmp0(range &a, range&b) {return a.r > b.r;}
bool cmp1(range &a, range&b) {return a.mx > b.mx;}
const int maxn = 2505, INF = 1e9;
int n, m;
vector<vector<int>> a;
vector<pair<int,int>> pos[2][maxn][maxn];
vector<range> start[2][maxn][maxn];

int fen[maxn];
void update(int id, int val) {
    while (id<maxn) {
        fen[id] += val;
        id += (id & -id);
    }
}
int qry(int id) {
    int val = 0;
    while (id >= 1) {
        val += fen[id];
        id -= (id & -id);
    }
    return val;
}

long long count_rectangles(vector<vector<int>> A) {
    a = A;
	n = a.size(), m = a[0].size();
    for (int i=0;i<n;i++) {
        vector<pair<int,int>> cur;
        for (int j=0;j<m;j++) cur.push_back({a[i][j], j});
        sort(cur.rbegin(), cur.rend());
        set<int> s; s.insert(-1); s.insert(INF);
        vector<int> temp;
        for (int j=0;j<m;j++) {
            auto [val, id] = cur[j];
            if (j>0 && val!=cur[j-1].first) {
                for (int x:temp) s.insert(x);
                temp.clear();
            }
            auto it = s.upper_bound(id);
            int l = *prev(it), r = *it;
            if (l!=-1 && r!=INF) {
                l++, r--;
                pos[0][l][r].push_back({i, -1});
                start[0][i][l].push_back({l, r, -1});
            }
            temp.push_back(id);
        }
    }

    for (int j=0;j<m;j++) {
        vector<pair<int,int>> cur;
        for (int i=0;i<n;i++) cur.push_back({a[i][j], i});
        sort(cur.rbegin(), cur.rend());
        set<int> s; s.insert(-1); s.insert(INF);
        vector<int> temp;
        for (int i=0;i<n;i++) {
            auto [val, id] = cur[i];
            if (i>0 && val!=cur[i-1].first) {
                for (int x:temp) s.insert(x);
                temp.clear();
            }
            auto it = s.upper_bound(id);
            int l = *prev(it), r = *it;
            if (l!=-1 && r!=INF) {
                l++, r--;
                pos[1][l][r].push_back({j, -1});
                start[1][l][j].push_back({l, r, -1});
            }
            temp.push_back(id);
        }
    }

    for (int I=0;I<=1;I++) for (int i=0;i<n;i++) for (int j=0;j<m;j++) sort(pos[I][i][j].begin(), pos[I][i][j].end());
    for (int I=0;I<=1;I++) {
        int nn = m;
        if (I==1) nn = n;
        for (int l=0;l<nn;l++) for (int r=l;r<nn;r++) {
            int sz = pos[I][l][r].size();
            // if (I==1 && sz>0) cout << l << " " << r << " " << sz << endl;
            for (int i=sz-1;i>=0;i--) {
                if (i==sz-1 || pos[I][l][r][i+1].first!=pos[I][l][r][i].first+1) pos[I][l][r][i].second = pos[I][l][r][i].first;
                else pos[I][l][r][i].second = pos[I][l][r][i+1].second;
                // if (I==1) cout << pos[I][l][r][i].first << " " << pos[I][l][r][i].second << endl;
            }
        }
    }
    for (int I=0;I<=1;I++) {
        for (int i=0;i<n;i++) for (int j=0;j<m;j++) {
            // cout << "test " << I << " " << i << " " << j << endl;
            for (auto &[l, r, mx]:start[I][i][j]) {
                // cout << l << " " << r << " " << mx << endl;
                int id = i;
                if (I==1) id = j;
                mx = (*lower_bound(pos[I][l][r].begin(), pos[I][l][r].end(), make_pair(id, 0))).second;
            }
        }
    }
    ll ans = 0;
    for (int i=0;i<n;i++) for (int j=0;j<m;j++) {
        sort(start[0][i][j].begin(), start[0][i][j].end(), cmp0);
        sort(start[1][i][j].begin(), start[1][i][j].end(), cmp1);
        int pt = -1;
        vector<int> LOG;
        for (auto [l, r, mx]:start[0][i][j]) {
            while (pt+1 < start[1][i][j].size() && start[1][i][j][pt+1].mx >= r) {
                pt++;
                update(start[1][i][j][pt].r, 1);
                LOG.push_back(start[1][i][j][pt].r);
            }
            ans += qry(mx);
        }
        for (int x:LOG) update(x, -1);
    }
    return ans;
}

Compilation message

rect.cpp: In function 'long long int count_rectangles(std::vector<std::vector<int> >)':
rect.cpp:113:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<range>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  113 |             while (pt+1 < start[1][i][j].size() && start[1][i][j][pt+1].mx >= r) {
      |                    ~~~~~^~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 216 ms 589672 KB Output is correct
2 Correct 215 ms 589912 KB Output is correct
3 Correct 221 ms 589888 KB Output is correct
4 Correct 224 ms 589908 KB Output is correct
5 Correct 223 ms 589756 KB Output is correct
6 Correct 243 ms 589804 KB Output is correct
7 Correct 247 ms 589652 KB Output is correct
8 Correct 217 ms 589648 KB Output is correct
9 Incorrect 227 ms 589676 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #2
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 216 ms 589672 KB Output is correct
2 Correct 215 ms 589912 KB Output is correct
3 Correct 221 ms 589888 KB Output is correct
4 Correct 224 ms 589908 KB Output is correct
5 Correct 223 ms 589756 KB Output is correct
6 Correct 243 ms 589804 KB Output is correct
7 Correct 247 ms 589652 KB Output is correct
8 Correct 217 ms 589648 KB Output is correct
9 Incorrect 227 ms 589676 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #3
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 216 ms 589672 KB Output is correct
2 Correct 215 ms 589912 KB Output is correct
3 Correct 221 ms 589888 KB Output is correct
4 Correct 224 ms 589908 KB Output is correct
5 Correct 223 ms 589756 KB Output is correct
6 Correct 243 ms 589804 KB Output is correct
7 Correct 247 ms 589652 KB Output is correct
8 Correct 217 ms 589648 KB Output is correct
9 Incorrect 227 ms 589676 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #4
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 216 ms 589672 KB Output is correct
2 Correct 215 ms 589912 KB Output is correct
3 Correct 221 ms 589888 KB Output is correct
4 Correct 224 ms 589908 KB Output is correct
5 Correct 223 ms 589756 KB Output is correct
6 Correct 243 ms 589804 KB Output is correct
7 Correct 247 ms 589652 KB Output is correct
8 Correct 217 ms 589648 KB Output is correct
9 Incorrect 227 ms 589676 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 247 ms 590424 KB Output is correct
2 Correct 240 ms 590420 KB Output is correct
3 Correct 262 ms 589804 KB Output is correct
4 Correct 253 ms 589656 KB Output is correct
5 Correct 348 ms 590480 KB Output is correct
6 Correct 236 ms 590396 KB Output is correct
7 Correct 265 ms 590436 KB Output is correct
8 Correct 265 ms 590488 KB Output is correct
9 Correct 247 ms 590420 KB Output is correct
10 Correct 244 ms 590124 KB Output is correct
11 Correct 236 ms 590252 KB Output is correct

Subtask #6
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 228 ms 589652 KB Output is correct
2 Incorrect 1738 ms 725092 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #7
0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 216 ms 589672 KB Output is correct
2 Correct 215 ms 589912 KB Output is correct
3 Correct 221 ms 589888 KB Output is correct
4 Correct 224 ms 589908 KB Output is correct
5 Correct 223 ms 589756 KB Output is correct
6 Correct 243 ms 589804 KB Output is correct
7 Correct 247 ms 589652 KB Output is correct
8 Correct 217 ms 589648 KB Output is correct
9 Incorrect 227 ms 589676 KB Output isn't correct
10 Halted 0 ms 0 KB -