// EXPLOSION!
#define _CRT_SECURE_NO_WARNINGS
#include<bits/stdc++.h>
#include<unordered_set>
#include<unordered_map>
#include<chrono>
using namespace std;
typedef pair<int, int> pii;
typedef long long ll;
typedef pair<ll, ll> pll;
typedef long double ld;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<pair<int, int>> vpi;
typedef vector<pair<ll, ll>> vpll;
#define FOR(i,a,b) for (int i = (a); i < (b); ++i)
#define F0R(i,a) FOR(i,0,a)
#define ROF(i,a,b) for (int i = (b)-1; i >= (a); --i)
#define R0F(i,a) ROF(i,0,a)
#define trav(a,x) for (auto& a: x)
#define pb push_back
#define mp make_pair
#define rsz resize
#define sz(x) int(x.size())
#define all(x) x.begin(),x.end()
#define f first
#define s second
#define cont continue
#define endl '\n'
//#define ednl '\n'
#define test int testc;cin>>testc;while(testc--)
#define pr(a, b) trav(x,a)cerr << x << b; cerr << endl;
#define message cout << "Hello World" << endl;
const int dx[4] = { 1,0,-1,0 }, dy[4] = { 0,1,0,-1 }; // for every grid problem!!
const ll linf = 4000000000000000000LL;
const ll inf = 1000000007;//998244353
void pv(vi a) { trav(x, a)cout << x << " "; cout << endl; }void pv(vll a) { trav(x, a)cout << x << " "; cout << endl; }void pv(vector<vi>a) {
F0R(i, sz(a)) { cout << i << endl; pv(a[i]); cout << endl; }
}void pv(vector<vll>a) { F0R(i, sz(a)) { cout << i << endl; pv(a[i]); }cout << endl; }void pv(vector<string>a) { trav(x, a)cout << x << endl; cout << endl; }
void setIO(string s) {
ios_base::sync_with_stdio(0); cin.tie(0);
if (sz(s))
{
freopen((s + ".in").c_str(), "r", stdin);
if (s != "test1")
freopen((s + ".out").c_str(), "w", stdout);
}
}
const int MAX = 1005;
int n, m, q;
bitset<MAX> dp[MAX];
struct T
{
int d;
vpi path;
bitset<MAX>b[MAX];
T(int dir)
{
d = dir;
}
void init(int i, int j)
{
if (i < 0 || j < 0 || i >= n || j >= m || dp[i][j])return;
path.pb({ i,j });
b[i][j] = 1;
int x = i + dx[d], y = j + dy[d];
init(x, y);
if (sz(path) == n + m - 1)return;
dp[x][y] = 1;
x = i + dx[d ^ 1], y = j + dy[d ^ 1];
init(x, y);
if (sz(path) == n + m - 1)return;
dp[x][y] = 1;
path.pop_back();
b[i][j] = 0;
}
void init()
{
init(0, 0);
}
void upd(int x, int y)
{
int index = x + y;
while (sz(path) > index)path.pop_back();
while (1)
{
int x = path.back().f, y = path.back().s;
path.pop_back();
init(x, y);
if (sz(path) == m + n - 1)return;
}
}
};
int main()
{
setIO("");
cin >> n >> m;
F0R(i, n)F0R(j, m)
{
int t;
cin >> t;
dp[i][j] = t;
}
T top(1), bot(0);
top.init();
bot.init();
cin >> q;
while (q--)
{
int x, y;
cin >> x >> y;
x--, y--;
if (top.b[x][y] && bot.b[x][y])
{
cout << "0" << endl;
continue;
}
dp[x][y] = 1;
cout << "1" << endl;
top.upd(x, y);
bot.upd(x, y);
}
}
Compilation message
furniture.cpp: In function 'void setIO(std::string)':
furniture.cpp:48:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
48 | freopen((s + ".in").c_str(), "r", stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
furniture.cpp:50:11: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
50 | freopen((s + ".out").c_str(), "w", stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
588 KB |
Output is correct |
| 2 |
Correct |
15 ms |
588 KB |
Output is correct |
| 3 |
Correct |
22 ms |
652 KB |
Output is correct |
| 4 |
Correct |
53 ms |
588 KB |
Output is correct |
| 5 |
Correct |
51 ms |
672 KB |
Output is correct |
| 6 |
Correct |
63 ms |
696 KB |
Output is correct |
| 7 |
Correct |
58 ms |
696 KB |
Output is correct |
| 8 |
Correct |
55 ms |
596 KB |
Output is correct |
| 9 |
Correct |
58 ms |
692 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
588 KB |
Output is correct |
| 2 |
Correct |
15 ms |
588 KB |
Output is correct |
| 3 |
Correct |
22 ms |
652 KB |
Output is correct |
| 4 |
Correct |
53 ms |
588 KB |
Output is correct |
| 5 |
Correct |
51 ms |
672 KB |
Output is correct |
| 6 |
Correct |
63 ms |
696 KB |
Output is correct |
| 7 |
Correct |
58 ms |
696 KB |
Output is correct |
| 8 |
Correct |
55 ms |
596 KB |
Output is correct |
| 9 |
Correct |
58 ms |
692 KB |
Output is correct |
| 10 |
Correct |
543 ms |
1092 KB |
Output is correct |
| 11 |
Correct |
41 ms |
588 KB |
Output is correct |
| 12 |
Execution timed out |
5037 ms |
3936 KB |
Time limit exceeded |
| 13 |
Halted |
0 ms |
0 KB |
- |
