| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 1018034 |
2024-07-09T13:06:59 Z |
c2zi6 |
Rectangles (IOI19_rect) |
C++14 |
|
799 ms |
1048576 KB |
#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
#define ff first
#define ss second
#define pb push_back
#define all(a) (a).begin(), (a).end()
#define replr(i, a, b) for (int i = int(a); i <= int(b); ++i)
#define reprl(i, a, b) for (int i = int(a); i >= int(b); --i)
#define rep(i, n) for (int i = 0; i < int(n); ++i)
#define mkp(a, b) make_pair(a, b)
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> PII;
typedef vector<int> VI;
typedef vector<PII> VPI;
typedef vector<VI> VVI;
typedef vector<VVI> VVVI;
typedef vector<VPI> VVPI;
typedef pair<ll, ll> PLL;
typedef vector<ll> VL;
typedef vector<PLL> VPL;
typedef vector<VL> VVL;
typedef vector<VVL> VVVL;
typedef vector<VPL> VVPL;
template<class T> T setmax(T& a, T b) {if (a < b) return a = b; return a;}
template<class T> T setmin(T& a, T b) {if (a < b) return a; return a = b;}
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
template<class T>
using indset = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
#include "rect.h"
namespace TEST1 {
int lg[3001];
struct SPARSETABLE {
VVI table;
SPARSETABLE(){};
SPARSETABLE(VI a) {
int n = a.size();
table = VVI(n, VI(14));
reprl(i, n-1, 0) {
table[i][0] = a[i];
for (int j = 1; i+(1<<(j-1)) < n; j++) {
table[i][j] = max(table[i][j-1], table[i + (1<<(j-1))][j-1]);
}
}
}
int get(int l, int r) {
int s = lg[r - l + 1];
return max(table[l][s], table[r-(1<<s)+1][s]);
}
};
ll count_rectangles(VVI a) {
lg[1] = 0; replr(i, 2, 3000) lg[i] = lg[i/2]+1;
int n = a.size();
int m = a[0].size();
vector<SPARSETABLE> rows(n);
vector<SPARSETABLE> cols(m);
rep(i, n) {
rows[i] = SPARSETABLE(a[i]);
}
rep(j, m) {
VI b;
rep(i, n) b.pb(a[i][j]);
cols[j] = SPARSETABLE(b);
}
ll ans = 0;
replr(r1, 1, n-2) replr(r2, r1, n-2) {
replr(c1, 1, m-2) replr(c2, c1, m-2) {
bool good = true;
replr(i, r1, r2) {
if (rows[i].get(c1, c2) >= min(a[i][c1-1], a[i][c2+1])) {
good = false;
break;
}
}
if (!good) continue;
replr(j, c1, c2) {
if (cols[j].get(r1, r2) >= min(a[r1-1][j], a[r2+1][j])) {
good = false;
break;
}
}
if (!good) continue;
/*cout << r1 << " " << r2 << " " << c1 << " " << c2 << endl;*/
ans++;
}
}
return ans;
}
}
namespace TEST6 {
bool check(VVI a) {
for (VI& vec : a) for (int x : vec) if (x > 1) return false;
return true;
}
int n, m;
int r1, r2, c1, c2;
void dfs(int ux, int uy, VVI& a) {
VPI harevan = {{ux-1, uy}, {ux+1, uy}, {ux, uy-1}, {ux, uy+1}};
a[ux][uy] = 2;
setmin(r1, ux);
setmax(r2, ux);
setmin(c1, uy);
setmax(c2, uy);
for (auto[vx, vy] : harevan) {
if (vx < 0 || vx >= n) continue;
if (vy < 0 || vy >= m) continue;
if (a[vx][vy]) continue;
dfs(vx, vy, a);
}
}
ll count_rectangles(VVI a) {
n = a.size();
m = a[0].size();
VVI pref(n+1, VI(m+1));
replr(i, 1, n) replr(j, 1, m) {
pref[i][j] = a[i-1][j-1] + pref[i-1][j] + pref[i][j-1] - pref[i-1][j-1];
}
int ans = 0;
rep(i, n) rep(j, m) if (a[i][j] == 0) {
r1 = +2e9;
r2 = -2e9;
c1 = +2e9;
c2 = -2e9;
/*cout << "dfs at " << i << " " << j << endl;*/
dfs(i, j, a);
/*cout << r1 << " " << r2 << " " << c1 << " " << c2 << endl;*/
if (r1 == 0 || r2 == n-1 || c1 == 0 || c2 == m-1) continue;
if (r1 < 0 || c1 < 0 || r2 > n || c2 > m) return 0;
if (pref[r2+1][c2+1] - pref[r1][c2+1] - pref[r2+1][c1] + pref[r1][c1] == 0) {
/*cout << r1 << " " << r2 << " " << c1 << " " << c2 << endl;*/
ans++;
}
}
return ans;
}
}
ll count_rectangles(VVI a) {
if (TEST6::check(a)) return TEST6::count_rectangles(a);
return 0ll;
if (TEST6::check(a)) return TEST6::count_rectangles(a);
return TEST1::count_rectangles(a);
}
Compilation message
rect.cpp: In function 'void TEST6::dfs(int, int, VVI&)':
rect.cpp:107:18: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
107 | for (auto[vx, vy] : harevan) {
| ^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
348 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
348 KB |
Output is correct |
| 2 |
Correct |
112 ms |
50932 KB |
Output is correct |
| 3 |
Correct |
262 ms |
110116 KB |
Output is correct |
| 4 |
Correct |
270 ms |
110784 KB |
Output is correct |
| 5 |
Correct |
271 ms |
110864 KB |
Output is correct |
| 6 |
Correct |
382 ms |
364920 KB |
Output is correct |
| 7 |
Correct |
799 ms |
894712 KB |
Output is correct |
| 8 |
Runtime error |
662 ms |
1048576 KB |
Execution killed with signal 9 |
| 9 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
