| # | Time | Username | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 827848 | OrazB | Rectangles (IOI19_rect) | C++14 | 0 ms | 0 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>using namespace std;#define all(x) (x).begin(), (x).end()#define ll long long int#define pii pair <int, int>#define pb push_back#define ff first#define ss secondconst int N = 205;int mxc[N][N][N];int mxr[N][N][N];int row[N][N][N], col[N][N][N];ll count_rectangles(vector<vector<int>> a){int ans = 0, sub6 = 0;int n = a.size(), m = a[0].size();for (int i = 0; i < n; i++){for (int j = 0; j < m; j++) sub6 |= (a[i][j]>1);}if (n < 3) return 0;if (n == 3){vector<vector<vector<int>>> mx(n, vector<vector<int>>(m, vector<int>(m,0)));vector<int> P(m, 0);for (int i = 0; i < n; i++){for (int x = 0; x < m; x++){for (int j = 0; j < m-x; j++){if (!x)mx[i][j][j] = a[i][j];elsemx[i][j][j+x] = max(mx[i][j][j+x-1], a[i][j+x]);}}}for (int i = 0; i < m; i++){if (a[0][i] <= a[1][i] or a[2][i] <= a[1][i]) P[i] = 1;if (i) P[i] += P[i-1];}int ans = 0;for (int i = 0; i < m; i++){for (int j = i+2; j < m; j++){if (a[1][i] > mx[1][i+1][j-1] and a[1][j] > mx[1][i+1][j-1] and !(P[j-1]-P[i])) ans++;}}return ans;}if (!sub6){vector<vector<int>> rw(m, vector<int>(n,0));vector<vector<int>> c(n, vector<int>(m,0));vector<vector<int>> mat(n, vector<int>(m,0));for (int i = 0; i < n; i++){for (int j = 0; j < m; j++){mat[i][j] = a[i][j];if (j) mat[i][j] += mat[i][j-1];}}for (int i = 1; i < n; i++){for (int j = 0; j < m; j++){mat[i][j] += mat[i-1][j];}}for (int i = 0; i < n; i++){for (int j = 0; j < m; j++){c[i][j] = a[i][j];if (j) c[i][j] += c[i][j-1];}}for (int i = 0; i < m; i++){for (int j = 0; j < n; j++){rw[i][j] = a[j][i];if (j) rw[i][j] += rw[i][j-1];}}for (int i = 1; i < n; i++){for (int j = 0; j < m; j++){if (a[i][j+1] == 1 or a[i][j] == 0) continue;int l = j+2, r = m-1, pos = -1;while(l <= r){int md = (l+r)>>1;if (c[i][md]-c[i][j] > 1) r = md - 1;else if (c[i][md]-c[i][j] == 1){pos=md;r=md-1;}else l = md + 1;}if (pos == -1) continue;if (c[i-1][pos-1]-c[i-1][j] != pos-j-1) continue;l = i+1, r = n-1;int pos1 = -1;while(l <= r){int md = (l+r)>>1;if (rw[j+1][md]-rw[j+1][i] > 1) r = md - 1;else if (rw[j+1][md]-rw[j+1][i] == 1){pos1=md;r=md-1;}else l = md + 1;}if (pos1 == -1) continue;if (c[pos1][pos-1]-c[pos1][j] != pos-j-1) continue;pos1--;if (rw[j][pos1]-rw[j][i] != pos1-i or rw[pos][pos1]-rw[pos][i] != pos1-i) continue;if (mat[pos1][pos-1]-mat[pos1][j]-mat[i-1][pos-1]+mat[i-1][j]) continue;ans++;}}return ans;}for (int i = 0; i < n; i++){for (int x = 0; x < m; x++){for (int j = 0; j < m-x; j++){if (!x)mxc[i][j][j] = a[i][j];elsemxc[i][j][j+x] = max(mxc[i][j][j+x-1], a[i][j+x]);}}}for (int i = 0; i < m; i++){for (int x = 0; x < n; x++){for (int j = 0; j < n-x; j++){ if (!x)mxr[i][j][j] = a[j][i];elsemxr[i][j][j+x] = max(mxr[i][j][j+x-1], a[j+x][i]);}}}for (int i = 0; i < n; i++){for (int j = 0; j < m; j++){for (int k = j+2; k < m; k++){row[i][j][k] = (a[i][j] > mxc[i][j+1][k-1] and a[i][k] > mxc[i][j+1][k-1]);if (i) row[i][j][k] += row[i-1][j][k];}}}for (int i = 0; i < m; i++){for (int j = 0; j < n; j++){for (int k = j+2; k < n; k++){col[i][j][k] = (a[j][i] > mxr[i][j+1][k-1] and a[k][i] > mxr[i][j+1][k-1]);if (i) col[i][j][k] += col[i-1][j][k];}}}for (int x = 2; x < n; x++){for (int y = 2; y < m; y++){for (int i = 0; i < n; i++){for (int j = 0; j < m; j++){if (row[i+x-1][j][j+y]-row[i][j][j+y] != x-1) continue;if (col[j+y-1][i][i+x]-col[j][i][i+x] != y-1) continue;ans++;}}}}return ans;}// int main ()// {// ios::sync_with_stdio(false);// cin.tie(0);// int n, m;// cin >> n >> m;// vector<vector<int>> a(n, vector<int>(m));// for (int i = 0; i < n; i++){// for (int j = 0; j < m; j++) cin >> a[i][j];// }// cout << count_rectangles(a);// }