#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());
}
int main(void){
ios::sync_with_stdio(0);cin.tie(0); cout.tie(0);
clock_t start = clock();
int n, m; cin >> n >> m;
int grid[n + 2][m + 2];
memset(grid, 0, sizeof grid);
for(int i = 1; i<=n; ++i) for(int j = 1; j<=m; ++j) cin >> grid[i][j];
int nxt[n+2][m+2], pre[n+2][m+2];;
for(int i = 0; i<=n+1; ++i) for(int j = 0; j<=m+1; ++j) {
nxt[i][j] = m+1;
pre[i][j] = 0;
}
for(int i = 1; i<=n; ++i){
for(int j = m; j>=0; --j){
nxt[i][j] = nxt[i][j+1];
if (grid[i][j]) nxt[i][j] = j;
}
for(int j = 1; j<=m+1; ++j){
pre[i][j] = pre[i][j-1];
if (grid[i][j]) pre[i][j] = j;
}
}
int L[n+2], R[n+2];
// L: unreachable left part, R: unreachable right part
L[n+1] = m, R[0] = 1;
for(int i = 1; i<=n; ++i){
R[i] = nxt[i][R[i-1] - 1];
}
for(int i = n; i>=1; --i){
L[i] = pre[i][L[i+1] + 1];
}
int q; cin >> q;
while(q--){
int x, y; cin >> x >> y;
int _L[n+2], _R[n+2];
for(int i = 0; i<=n+1; ++i) {
_L[i] = L[i];
_R[i] = R[i];
}
if (y >= _R[x-1] - 1) minimize(_R[x], y);
if (y <= _L[x+1] + 1) maximize(_L[x], y);
for(int i = x+1; i <= n; ++i){
_R[i] = nxt[i][_R[i-1] - 1];
if (_R[i] == R[i]) break;
}
for(int i = x-1; i>=1; --i){
_L[i] = pre[i][_L[i+1] + 1];
if (_L[i] == L[i]) break;
}
bool check = true;
for(int i = 1; i<=n; ++i) if (_L[i] >= _R[i]) check = false;
if (check == false){
cout << 0 << "\n";
}
else{
cout << 1 << "\n";
for(int i = 0; i<=n+1; ++i) {
L[i] = _L[i];
R[i] = _R[i];
}
nxt[x][y] = pre[x][y] = y;
for(int j = y-1; j >= 0; --j) {
minimize(nxt[x][j], nxt[x][j+1]);
}
for(int j = y+1; j <= m+1; ++j){
maximize(pre[x][j], pre[x][j-1]);
}
}
}
cerr << "Time elapsed: " << clock() - start << " ms\n";
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
344 KB |
Output is correct |
| 2 |
Incorrect |
2 ms |
544 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
344 KB |
Output is correct |
| 2 |
Incorrect |
2 ms |
544 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
