#include <bits/stdc++.h>
using namespace std;
#define ll int
ll dx[4]={0,0,1,-1};
ll dy[4]={1,-1,0,0};
vector<pair<ll,ll> >pos;
struct Graph{
bool vis[802][802];
ll dist[802][802];
vector<pair<ll,ll> >adj[802][802];
queue<pair<ll,ll> >q;
void init(ll n){
for(int i=1;i<=n;i++){
for(int j=1;j<=n;j++){
dist[i][j]=1e9;
}
}
}
void add_edge(ll r, ll c, ll r2, ll c2){
adj[r][c].push_back({r2,c2});
}
void bfs(){
for(auto& u: pos){
vis[u.first][u.second]=1;
dist[u.first][u.second]=0;
q.push({u.first,u.second});
}
while(!q.empty()){
pair<ll,ll>cur=q.front();
q.pop();
for(auto& u: adj[cur.first][cur.second]){
if(!vis[u.first][u.second]){
vis[u.first][u.second]=1;
dist[u.first][u.second]=dist[cur.first][cur.second]+1;
q.push(u);
}
}
}
}
}gp2;
struct Graph2{
bool vis[802][802];
vector<pair<ll,ll> >adj[802][802];
queue<pair<ll,ll> >q;
ll bees[802][802];
ll dist[802][802];
void add_edge(ll r, ll c, ll r2, ll c2){
adj[r][c].push_back({r2,c2});
}
void bfs(ll r, ll c, ll para, ll divi){
vis[r][c]=1;
dist[r][c]=0;
q.push({r,c});
while(!q.empty()){
pair<ll,ll>cur=q.front();
q.pop();
for(auto& u: adj[cur.first][cur.second]){
// cout<<bees[u.first][u.second]<<'\n';
// cout<<dist[cur.first][cur.second]+1<<" "<<(ll)(divi+1)*(ll)bees[u.first][u.second]-(ll)1<<'\n';
long long lol=divi;
lol*=((long long)bees[u.first][u.second]-(long long)para);
lol--;
long long lol2=dist[cur.first][cur.second];
lol2++;
// cout<<lol<<'\n';
// if(lol<0){
// cout<<divi+1<<" "<<bees[u.first][u.second]<<'\n';
// }
if(!vis[u.first][u.second]&&(lol2<=lol)){
// cout<<u.first<<" "<<u.second<<'\n';
vis[u.first][u.second]=1;
dist[u.first][u.second]=dist[cur.first][cur.second]+1;
q.push(u);
}
}
}
}
void clear(ll n){
for(int i=1;i<=n;i++){
for(int j=1;j<=n;j++){
// cout<<bees[i][j]<<" ";
vis[i][j]=0;
dist[i][j]=1e9;
}
// cout<<'\n';
}
}
bool ck(ll r, ll c, ll n, ll par, ll finr, ll finc, ll divi){
clear(n);
bfs(r,c,par,divi);
if(vis[finr][finc]){
return 1;
}
return 0;
}
}gp3;
int main() {
ios_base::sync_with_stdio(0);
cin.tie(0); cout.tie(0);
ll n,s;
cin>>n>>s;
char arr[n+2][n+2];
gp2.init(n);
for(int i=1;i<=n;i++){
for(int j=1;j<=n;j++){
cin>>arr[i][j];
}
}
for(int i=1;i<=n;i++){
for(int j=1;j<=n;j++){
for(int k=0;k<4;k++){
if(arr[i][j]=='M'||arr[i][j]=='G'||arr[i][j]=='D'||arr[i][j]=='H'){
if(arr[i+dx[k]][j+dy[k]]=='M'||arr[i+dx[k]][j+dy[k]]=='G'||arr[i+dx[k]][j+dy[k]]=='D'||arr[i+dx[k]][j+dy[k]]=='H'){
gp3.add_edge(i,j,i+dx[k],j+dy[k]);
}
}
if(arr[i][j]=='M'||arr[i][j]=='G'||arr[i][j]=='H'){
if(arr[i+dx[k]][j+dy[k]]=='M'||arr[i+dx[k]][j+dy[k]]=='G'||arr[i+dx[k]][j+dy[k]]=='H'){
gp2.add_edge(i,j,i+dx[k],j+dy[k]);
}
}
}
if(arr[i][j]=='H'){
pos.push_back({i,j});
}
}
}
gp2.bfs();
pos.clear();
ll startr,startc,endr,endc;
for(int i=1;i<=n;i++){
for(int j=1;j<=n;j++){
if(arr[i][j]=='M'){
startr=i,startc=j;
}
if(arr[i][j]=='D'){
endr=i,endc=j;
}
}
}
for(int i=1;i<=n;i++){
for(int j=1;j<=n;j++){
gp3.bees[i][j]=gp2.dist[i][j];
}
}
pos.clear();
ll l=0,r=10000000;
while(l<=r){
if(l==r){
break;
}
else if(l==r-1){
if(gp3.ck(startr,startc,n,r,endr,endc,s)){
l=r;
}
else{
r=l;
}
break;
}
else{
ll mid=(l+r)>>1;
if(gp3.ck(startr,startc,n,mid,endr,endc,s)){
l=mid;
}
else{
r=mid;
}
}
}
// cout<<'\n';
// cout<<l<<'\n';
if(!gp3.ck(startr,startc,n,l,endr,endc,s)){
cout<<"-1\n";
}
else{
cout<<l<<'\n';
}
}
Compilation message
mecho.cpp: In function 'int main()':
mecho.cpp:156:22: warning: 'startc' may be used uninitialized in this function [-Wmaybe-uninitialized]
156 | if(gp3.ck(startr,startc,n,r,endr,endc,s)){
| ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
mecho.cpp:156:22: warning: 'startr' may be used uninitialized in this function [-Wmaybe-uninitialized]
mecho.cpp:156:22: warning: 'endc' may be used uninitialized in this function [-Wmaybe-uninitialized]
mecho.cpp:156:22: warning: 'endr' may be used uninitialized in this function [-Wmaybe-uninitialized]
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
12 ms |
37212 KB |
Output is correct |
| 2 |
Correct |
10 ms |
37260 KB |
Output is correct |
| 3 |
Correct |
13 ms |
37212 KB |
Output is correct |
| 4 |
Correct |
11 ms |
37212 KB |
Output is correct |
| 5 |
Correct |
13 ms |
37452 KB |
Output is correct |
| 6 |
Correct |
11 ms |
37212 KB |
Output is correct |
| 7 |
Runtime error |
74 ms |
65536 KB |
Execution killed with signal 9 |
| 8 |
Correct |
11 ms |
37212 KB |
Output is correct |
| 9 |
Correct |
11 ms |
37212 KB |
Output is correct |
| 10 |
Correct |
12 ms |
37292 KB |
Output is correct |
| 11 |
Correct |
11 ms |
37212 KB |
Output is correct |
| 12 |
Incorrect |
12 ms |
37212 KB |
Output isn't correct |
| 13 |
Incorrect |
13 ms |
37468 KB |
Output isn't correct |
| 14 |
Correct |
14 ms |
37468 KB |
Output is correct |
| 15 |
Correct |
12 ms |
37212 KB |
Output is correct |
| 16 |
Correct |
11 ms |
37212 KB |
Output is correct |
| 17 |
Correct |
11 ms |
37212 KB |
Output is correct |
| 18 |
Correct |
12 ms |
37212 KB |
Output is correct |
| 19 |
Correct |
13 ms |
37212 KB |
Output is correct |
| 20 |
Correct |
14 ms |
37212 KB |
Output is correct |
| 21 |
Correct |
12 ms |
37212 KB |
Output is correct |
| 22 |
Correct |
11 ms |
37344 KB |
Output is correct |
| 23 |
Correct |
11 ms |
37212 KB |
Output is correct |
| 24 |
Correct |
11 ms |
37204 KB |
Output is correct |
| 25 |
Correct |
11 ms |
37236 KB |
Output is correct |
| 26 |
Correct |
11 ms |
37212 KB |
Output is correct |
| 27 |
Correct |
12 ms |
37212 KB |
Output is correct |
| 28 |
Correct |
12 ms |
37212 KB |
Output is correct |
| 29 |
Correct |
11 ms |
37468 KB |
Output is correct |
| 30 |
Correct |
12 ms |
37260 KB |
Output is correct |
| 31 |
Correct |
12 ms |
37308 KB |
Output is correct |
| 32 |
Correct |
12 ms |
37468 KB |
Output is correct |
| 33 |
Correct |
29 ms |
43352 KB |
Output is correct |
| 34 |
Correct |
25 ms |
43368 KB |
Output is correct |
| 35 |
Correct |
78 ms |
47188 KB |
Output is correct |
| 36 |
Correct |
28 ms |
44772 KB |
Output is correct |
| 37 |
Correct |
29 ms |
44632 KB |
Output is correct |
| 38 |
Correct |
138 ms |
49540 KB |
Output is correct |
| 39 |
Correct |
33 ms |
46164 KB |
Output is correct |
| 40 |
Correct |
37 ms |
46420 KB |
Output is correct |
| 41 |
Correct |
272 ms |
52304 KB |
Output is correct |
| 42 |
Correct |
38 ms |
47728 KB |
Output is correct |
| 43 |
Correct |
38 ms |
47780 KB |
Output is correct |
| 44 |
Correct |
344 ms |
55596 KB |
Output is correct |
| 45 |
Correct |
43 ms |
49456 KB |
Output is correct |
| 46 |
Correct |
45 ms |
49492 KB |
Output is correct |
| 47 |
Correct |
409 ms |
58892 KB |
Output is correct |
| 48 |
Correct |
50 ms |
51292 KB |
Output is correct |
| 49 |
Correct |
48 ms |
51440 KB |
Output is correct |
| 50 |
Correct |
473 ms |
62804 KB |
Output is correct |
| 51 |
Correct |
60 ms |
53376 KB |
Output is correct |
| 52 |
Correct |
55 ms |
53332 KB |
Output is correct |
| 53 |
Runtime error |
137 ms |
65536 KB |
Execution killed with signal 9 |
| 54 |
Correct |
64 ms |
55780 KB |
Output is correct |
| 55 |
Correct |
61 ms |
55760 KB |
Output is correct |
| 56 |
Runtime error |
76 ms |
65536 KB |
Execution killed with signal 9 |
| 57 |
Correct |
69 ms |
58144 KB |
Output is correct |
| 58 |
Correct |
71 ms |
58020 KB |
Output is correct |
| 59 |
Runtime error |
77 ms |
65536 KB |
Execution killed with signal 9 |
| 60 |
Correct |
84 ms |
60680 KB |
Output is correct |
| 61 |
Correct |
92 ms |
60732 KB |
Output is correct |
| 62 |
Runtime error |
80 ms |
65536 KB |
Execution killed with signal 9 |
| 63 |
Runtime error |
114 ms |
65536 KB |
Execution killed with signal 9 |
| 64 |
Runtime error |
117 ms |
65536 KB |
Execution killed with signal 9 |
| 65 |
Runtime error |
118 ms |
65536 KB |
Execution killed with signal 9 |
| 66 |
Runtime error |
113 ms |
65536 KB |
Execution killed with signal 9 |
| 67 |
Runtime error |
113 ms |
65536 KB |
Execution killed with signal 9 |
| 68 |
Runtime error |
135 ms |
65536 KB |
Execution killed with signal 9 |
| 69 |
Runtime error |
125 ms |
65536 KB |
Execution killed with signal 9 |
| 70 |
Runtime error |
118 ms |
65536 KB |
Execution killed with signal 9 |
| 71 |
Runtime error |
123 ms |
65536 KB |
Execution killed with signal 9 |
| 72 |
Runtime error |
121 ms |
65536 KB |
Execution killed with signal 9 |
| 73 |
Runtime error |
94 ms |
65536 KB |
Execution killed with signal 9 |
| 74 |
Runtime error |
79 ms |
65536 KB |
Execution killed with signal 9 |
| 75 |
Runtime error |
77 ms |
65536 KB |
Execution killed with signal 9 |
| 76 |
Runtime error |
75 ms |
65536 KB |
Execution killed with signal 9 |
| 77 |
Runtime error |
75 ms |
65536 KB |
Execution killed with signal 9 |
| 78 |
Runtime error |
93 ms |
65536 KB |
Execution killed with signal 9 |
| 79 |
Runtime error |
76 ms |
65536 KB |
Execution killed with signal 9 |
| 80 |
Runtime error |
79 ms |
65536 KB |
Execution killed with signal 9 |
| 81 |
Runtime error |
82 ms |
65536 KB |
Execution killed with signal 9 |
| 82 |
Runtime error |
76 ms |
65536 KB |
Execution killed with signal 9 |
| 83 |
Runtime error |
80 ms |
65536 KB |
Execution killed with signal 9 |
| 84 |
Runtime error |
75 ms |
65536 KB |
Execution killed with signal 9 |
| 85 |
Runtime error |
76 ms |
65536 KB |
Execution killed with signal 9 |
| 86 |
Runtime error |
75 ms |
65536 KB |
Execution killed with signal 9 |
| 87 |
Runtime error |
74 ms |
65536 KB |
Execution killed with signal 9 |
| 88 |
Runtime error |
75 ms |
65536 KB |
Execution killed with signal 9 |
| 89 |
Runtime error |
84 ms |
65536 KB |
Execution killed with signal 9 |
| 90 |
Runtime error |
77 ms |
65536 KB |
Execution killed with signal 9 |
| 91 |
Runtime error |
76 ms |
65536 KB |
Execution killed with signal 9 |
| 92 |
Runtime error |
78 ms |
65536 KB |
Execution killed with signal 9 |
