QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#640097 | #2924. Lone Rook | enze114514 | WA | 0ms | 3792kb | C++20 | 4.0kb | 2024-10-14 04:54:00 | 2024-10-14 04:54:00 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
#define pb push_back
const ld pi = 3.14159265358979323846;
const int mod = 998244353;
const ll INF = 1e18;
template<typename T>
T chmax(T a, T b) {
return a > b ? a : b;
}
template<typename T>
T chmin(T a, T b) {
return a > b ? b : a;
}
const int N = (int)1e5 + 1, M = N * 2;
int jpx[8] = {-2, -2, -1, -1, 1, 1, 2, 2}, jpy[8] = {-1, 1, -2, 2, -2, 2, -1, 1};
int dirx[4] = {1, -1, 0, 0}, diry[4] = {0, 0, 1, -1};
void solve(){
int n, m;
cin >> n >> m;
char c[n][m];
vector<vector<int>> d(n, vector<int>(m, 0)), v(n, vector<int>(m, 0));
for(int i = 0; i < n; i++){
string s;
cin >> s;
for(int j = 0; j < m; j++){
v[i][j] = d[i][j] = 0;
c[i][j] = s[j];
}
}
map<pair<int, int>, int> mp;
auto set = [&](int q, int p, int op) -> void{
for(int i = 0; i < 8; i++){
int x = q + jpx[i], y = p + jpy[i];
if(x < 0 || y < 0 || x >= n || y >= m){
continue;
}
d[x][y] += op;
}
};
queue<pair<int, int>> q;
for(int i = 0; i < n; i++){
for(int j = 0; j < m; j++){
if(c[i][j] == 'R'){
q.push({i, j});
v[i][j] = 1;
}
if(c[i][j] == 'K'){
set(i, j, 1);
}
}
}
while(!q.empty()){
auto p = q.front();
q.pop();
int x = p.first, y = p.second;
queue<pair<int, int>> hr;
for(int i = 0; i < 4; i++){
int dx = x + dirx[i], dy = y + diry[i];
while(dx >= 0 && dy >= 0 && dx < n && dy < m){
if(v[dx][dy]){
}
else if(d[dx][dy]){
mp[{dx, dy}] = 1;
}
else{
if(c[dx][dy] == 'K'){
hr.push({dx, dy});
}
else if(c[dx][dy] == 'T'){
cout << "yes" << endl;
return;
}
else{
v[dx][dy] = 1;
q.push({dx, dy});
// cout << "first " << dx << " " << dy << " " << v[dx][dy] << endl;
}
}
dx += dirx[i], dy += diry[i];
}
}
// cout << q.size() << endl;
while(!hr.empty()){
auto kn = hr.front();
hr.pop();
int nx = kn.first, ny = kn.second;
c[nx][ny] = '.';
v[nx][ny] = 1;
q.push({nx, ny});
// cout << "second " << nx << " " << ny << endl;
set(nx, ny, -1);
for(int i = 0; i < 8; i++){
int dx = nx + jpx[i], dy = ny + jpy[i];
if(dx < 0 || dy < 0 || dx >= n || dy >= m) continue;
if(v[dx][dy]) continue;
if(!d[dx][dy] && mp[{dx, dy}]){
mp[{dx, dy}] = 0;
if(c[dx][dy] == 'K'){
hr.push({dx, dy});
}
else{
if(c[dx][dy] == 'T'){
cout << "yes" << endl;
return;
}
c[dx][dy] = '.';
v[dx][dy] = 1;
q.push({dx, dy});
// cout << "third " << dx << " " << dy << endl;
}
}
}
}
// cout << q.size() << endl;
}
cout << "no" << endl;
}
int main() {
// freopen(".in", "r", stdin);
// freopen(".out", "w", stdout);
ios::sync_with_stdio(false);
cin.tie(nullptr);
cout.tie(nullptr);
int t = 1;
// cin >> t;
while(t--){
solve();
}
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 0ms
memory: 3792kb
input:
2 2 KR TK
output:
yes
result:
ok single line: 'yes'
Test #2:
score: 0
Accepted
time: 0ms
memory: 3628kb
input:
2 3 R.K KKT
output:
yes
result:
ok single line: 'yes'
Test #3:
score: 0
Accepted
time: 0ms
memory: 3568kb
input:
5 3 KKT .K. K.. ... KKR
output:
yes
result:
ok single line: 'yes'
Test #4:
score: 0
Accepted
time: 0ms
memory: 3636kb
input:
2 4 R.KK KK.T
output:
no
result:
ok single line: 'no'
Test #5:
score: -100
Wrong Answer
time: 0ms
memory: 3668kb
input:
2 5 RKKK. ...KT
output:
yes
result:
wrong answer 1st lines differ - expected: 'no', found: 'yes'