Submission #1084343

#	Time	Username	Problem	Language	Result	Execution time	Memory
1084343		steveonalex	Rectangles (IOI19_rect)	C++17	37 / 100	1254 ms	1048576 KiB

rect

#include "rect.h"
#include <bits/stdc++.h>
 
using namespace std;
 
typedef long long ll;
typedef unsigned long long ull;
 
#define MASK(i) (1LL << (i))
#define GETBIT(mask, i) (((mask) >> (i)) & 1)
#define ALL(v) (v).begin(), (v).end()
#define block_of_code if(true)
 
ll max(ll a, ll b){return (a > b) ? a : b;}
ll min(ll a, ll b){return (a < b) ? a : b;}
ll gcd(ll a, ll b){return __gcd(a, b);}
ll lcm(ll a, ll b){return a / gcd(a, b) * b;}
 
ll LASTBIT(ll mask){return (mask) & (-mask);}
int pop_cnt(ll mask){return __builtin_popcountll(mask);}
int ctz(ull mask){return __builtin_ctzll(mask);}
int logOf(ull mask){return 63 - __builtin_clzll(mask);}
 
mt19937_64 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
ll rngesus(ll l, ll r){return l + (ull) rng() % (r - l + 1);}
double rngesus_d(double l, double r){
    double cur = rngesus(0, MASK(60) - 1);
    cur /= MASK(60) - 1;
    return l + cur * (r - l);
}
 
template <class T1, class T2>
    bool maximize(T1 &a, T2 b){
        if (a < b) {a = b; return true;}
        return false;
    }
 
template <class T1, class T2>
    bool minimize(T1 &a, T2 b){
        if (a > b) {a = b; return true;}
        return false;
    }
 
template <class T>
    void printArr(T container, string separator = " ", string finish = "\n", ostream &out = cout){
        for(auto item: container) out << item << separator;
        out << finish;
    }
 
template <class T>
    void remove_dup(vector<T> &a){
        sort(ALL(a));
        a.resize(unique(ALL(a)) - a.begin());
    }

ll count_rectangles(vector<vector<int>> a) {
    int n= a.size(), m = a[0].size();
    ll ans = 0;

    short row_pref[n][n][m], col_pref[m][m][n];
    memset(row_pref, 0, sizeof row_pref);
    memset(col_pref, 0, sizeof col_pref);

    for(int i = 0; i < n; ++i) for(int j = 0; j < m; ++j){
        int ma = 0;
        for(int k = i + 1; k + 1 < n; ++k){
            maximize(ma, a[k][j]);
            if (ma >= a[i][j]) break;
            if (ma < a[k+1][j]){
                row_pref[i][k+1][j] = 1;
            }
        }
        ma = 0;
        for(int k = j + 1; k + 1 < m; ++k){
            maximize(ma, a[i][k]);
            if (ma >= a[i][j]) break;
            if (ma < a[i][k+1]){
                col_pref[j][k+1][i] = 1;
            }
        }
    }

    for(int i = 0; i<n; ++i) for(int j = i + 2; j < n; ++j) for(int k = 1; k < m; ++k) row_pref[i][j][k] += row_pref[i][j][k-1];
    for(int i = 0; i<m; ++i) for(int j = i + 2; j < m; ++j) for(int k = 1; k < n; ++k) col_pref[i][j][k] += col_pref[i][j][k-1];

    for(int i = 0; i<n; ++i) for(int x = i + 2; x < n; ++x)
    for(int j = 0; j<m; ++j) for(int y = j + 2; y < m; ++y){
        int cnt1 = row_pref[i][x][y-1] - row_pref[i][x][j];
        int cnt2 = col_pref[j][y][x-1] - col_pref[j][y][i];
        if (cnt1 == y - j - 1 && cnt2 == x - i - 1) ans++;
    }

    return ans;
}

• Subtask 1: 8 / 8
• Subtask 2: 7 / 7
• Subtask 3: 12 / 12
• Subtask 4: 0 / 22
• Subtask 5: 10 / 10
• Subtask 6: 0 / 13
• Subtask 7: 0 / 28