#include "bits/stdc++.h"
using namespace std;
#define int long long
#define double long double
const int MAXN = 5e5 + 10;
const int MOD = 1e9 + 7;
mt19937_64 rng((int)std::chrono::steady_clock::now().time_since_epoch().count());
int rnd(int x, int y) {
int u = uniform_int_distribution<int>(x, y)(rng); return u;
}
int bm(int b, int p) {
if(p==0) return 1 % MOD;
int r = bm(b, p >> 1);
if(p&1) return (((r*r) % MOD) * b) % MOD;
return (r*r) % MOD;
}
int inv(int b) {
return bm(b, MOD-2);
}
int fastlog(int x) {
return (x == 0 ? -1 : 64 - __builtin_clzll(x) - 1);
}
void printcase(int i) { cout << "Case #" << i << ": "; }
static void run_with_stack_size(void (*func)(void), size_t stsize) {
char *stack, *send;
stack = (char *)malloc(stsize);
send = stack + stsize - 16;
send = (char *)((uintptr_t)send / 16 * 16);
asm volatile(
"mov %%rsp, (%0)\n"
"mov %0, %%rsp\n"
:
: "r"(send));
func();
asm volatile("mov (%0), %%rsp\n" : : "r"(send));
free(stack);
}
int dsu[1000002];
int set_of(int u) {
if(dsu[u] == u) return u;
return dsu[u] = set_of(dsu[u]);
}
void union_(int u, int v) {
dsu[set_of(u)] = set_of(v);
}
void solve(int tc) {
int n, m;
cin >> n >> m;
int c[n][m];
for(int i=0; i<n; i++) {
for(int j=0; j<m; j++) {
cin >> c[i][j];
}
}
int q;
cin >> q;
int x[q], y[q];
for(int i=0; i<q; i++) {
cin >> x[i] >> y[i];
x[i]--;
y[i]--;
c[x[i]][y[i]] = 2 + i;
}
for(int i=0; i<n; i++) {
for(int j=0; j<m; j++) {
if(c[i][j] == 0) c[i][j] = MOD;
}
}
int lb = 0, rb = MOD;
while(lb < rb) {
int mid = (lb + rb + 1) >> 1;
int give[n][m];
for(int i=0; i<n; i++) {
for(int j=0; j<m; j++) {
give[i][j] = (c[i][j] >= mid);
}
}
int dp[n][m];
for(int i=0; i<n; i++) {
for(int j=0; j<m; j++) {
dp[i][j] = give[i][j];
if(i > 0 && j > 0) dp[i][j] &= (dp[i-1][j] || dp[i][j-1]);
else if(i > 0) dp[i][j] &= dp[i-1][j];
else if(j > 0) dp[i][j] &= dp[i][j-1];
}
}
if(dp[n-1][m-1]) lb = mid;
else rb = mid - 1;
}
int k = lb;
int give[n][m];
for(int i=0; i<n; i++) {
for(int j=0; j<m; j++) {
give[i][j] = (c[i][j] >= k);
}
}
int dp[n][m];
for(int i=0; i<n; i++) {
for(int j=0; j<m; j++) {
dp[i][j] = give[i][j];
if(i > 0 && j > 0) dp[i][j] &= (dp[i-1][j] || dp[i][j-1]);
else if(i > 0) dp[i][j] &= dp[i-1][j];
else if(j > 0) dp[i][j] &= dp[i][j-1];
}
}
int R = n-1, C = m-1;
int good[n][m];
for(int i=0; i<n; i++) {
for(int j=0; j<m; j++) {
good[i][j] = 0;
}
}
good[n-1][m-1] = 1;
for(int i=0; i<n+m-2; i++) {
if(R > 0 && dp[R-1][C] == 1) {
R--;
good[R][C] = 1;
}
else {
C--;
good[R][C] = 1;
}
}
for(int i=0; i<q; i++) {
cout << (good[x[i]][y[i]] ^ 1) << '\n';
}
}
void uwu() {
ios::sync_with_stdio(0); cin.tie(0);
int t = 1; //cin >> t;
for(int i=1; i<=t; i++) solve(i);
}
int32_t main() {
#ifdef ONLINE_JUDGE
uwu();
#endif
#ifndef ONLINE_JUDGE
run_with_stack_size(uwu, 1024 * 1024 * 1024); // run with a 1 GiB stack
#endif
}
/*
g++ C.cpp -std=c++17 -O2 -o C
./C < input.txt
*/
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
604 KB |
Output is correct |
| 2 |
Incorrect |
3 ms |
2396 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
604 KB |
Output is correct |
| 2 |
Incorrect |
3 ms |
2396 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
