| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 499617 |
2021-12-29T05:09:02 Z |
_AnKahng |
Mecho (IOI09_mecho) |
C++14 |
|
140 ms |
4676 KB |
#include<bits/stdc++.h>
#define fi first
#define sc second
#define fr(i,a,b) for(int i=a;i<=b;i++)
#define fo(i,a,b) for(int i=a;i<=b;i++)
using namespace std;
const int H[] = {-1,-1,1,1};
const int M = 805;
int n,s,f[M][M];
bool cx[M][M];
pair<int,int> st,fn;
string a[M];
struct dota{
int x,y,d;
};
void BFS_hive(){
queue<dota> q;
memset(cx,false,sizeof(cx));
fo(i,1,n)
fo(j,1,n) {
if(a[i][j] != 'T') cx[i][j] = true;
if(a[i][j] == 'H') q.push({i,j,0}), f[i][j] = 0;
}
while(!q.empty()){
int x = q.front().x, y = q.front().y, d = q.front().d;
q.pop();
f[x][y] = d;
int xi,yi;
fo(k,0,3){
if(k % 2) xi = x + H[k], yi = y;
else xi = x, yi = y + H[k];
if(cx[xi][yi]) q.push({xi,yi,d+1}), cx[xi][yi] = false;
}
}
}
bool check(int t){
queue<dota> q;
memset(cx,false,sizeof(cx));
fo(i,1,n)
fo(j,1,n)
if(a[i][j] != 'T') cx[i][j] = true;
q.push({st.fi,st.sc,0});
while(!q.empty()){
int x = q.front().x, y = q.front().y, d = q.front().d;
q.pop();
if(x == fn.fi && y == fn.sc) return true;
int xi,yi;
fo(k,0,3){
if(k % 2) xi = x + H[k], yi = y;
else xi = x, yi = y + H[k];
if(cx[xi][yi] && (d + 1) / s < f[xi][yi] - t) q.push({xi,yi,d+1}), cx[xi][yi] = false;
}
}
return false;
}
int main()
{
ios_base::sync_with_stdio(0),cin.tie(0),cout.tie(0);
cin >> n >> s;
fo(i,1,n) cin >> a[i], a[i] = "*" + a[i];
fo(i,1,n)
fo(j,1,n)
if(a[i][j] == 'M') st = {i,j};
else if(a[i][j] == 'D') fn = {i,j};
BFS_hive();
//fo(i,1,n) fo(j,1,n) cout << f[i][j]<<" \n"[j == n];
int l = 0, r = n, mid,res;
while(l <= r){
mid = (l + r) / 2;
if(check(mid)) l = mid+1, res = mid;
else r = mid-1;
}
cout << res;
}
Compilation message
mecho.cpp: In function 'int main()':
mecho.cpp:77:13: warning: 'res' may be used uninitialized in this function [-Wmaybe-uninitialized]
77 | cout << res;
| ^~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
972 KB |
Output is correct |
| 2 |
Incorrect |
1 ms |
972 KB |
Output isn't correct |
| 3 |
Correct |
1 ms |
956 KB |
Output is correct |
| 4 |
Incorrect |
1 ms |
972 KB |
Output isn't correct |
| 5 |
Correct |
0 ms |
972 KB |
Output is correct |
| 6 |
Incorrect |
1 ms |
972 KB |
Output isn't correct |
| 7 |
Incorrect |
51 ms |
4300 KB |
Output isn't correct |
| 8 |
Incorrect |
1 ms |
972 KB |
Output isn't correct |
| 9 |
Correct |
1 ms |
972 KB |
Output is correct |
| 10 |
Correct |
1 ms |
972 KB |
Output is correct |
| 11 |
Correct |
1 ms |
972 KB |
Output is correct |
| 12 |
Incorrect |
1 ms |
1100 KB |
Output isn't correct |
| 13 |
Incorrect |
1 ms |
1100 KB |
Output isn't correct |
| 14 |
Incorrect |
1 ms |
1100 KB |
Output isn't correct |
| 15 |
Incorrect |
1 ms |
972 KB |
Output isn't correct |
| 16 |
Incorrect |
1 ms |
972 KB |
Output isn't correct |
| 17 |
Incorrect |
1 ms |
972 KB |
Output isn't correct |
| 18 |
Incorrect |
1 ms |
972 KB |
Output isn't correct |
| 19 |
Incorrect |
1 ms |
972 KB |
Output isn't correct |
| 20 |
Incorrect |
1 ms |
972 KB |
Output isn't correct |
| 21 |
Incorrect |
1 ms |
1100 KB |
Output isn't correct |
| 22 |
Incorrect |
1 ms |
1100 KB |
Output isn't correct |
| 23 |
Incorrect |
1 ms |
1100 KB |
Output isn't correct |
| 24 |
Incorrect |
1 ms |
1100 KB |
Output isn't correct |
| 25 |
Incorrect |
1 ms |
1100 KB |
Output isn't correct |
| 26 |
Incorrect |
1 ms |
1100 KB |
Output isn't correct |
| 27 |
Incorrect |
1 ms |
1100 KB |
Output isn't correct |
| 28 |
Incorrect |
1 ms |
1100 KB |
Output isn't correct |
| 29 |
Incorrect |
1 ms |
1100 KB |
Output isn't correct |
| 30 |
Incorrect |
2 ms |
1100 KB |
Output isn't correct |
| 31 |
Incorrect |
1 ms |
1100 KB |
Output isn't correct |
| 32 |
Incorrect |
2 ms |
1100 KB |
Output isn't correct |
| 33 |
Incorrect |
4 ms |
2124 KB |
Output isn't correct |
| 34 |
Incorrect |
5 ms |
2124 KB |
Output isn't correct |
| 35 |
Correct |
13 ms |
2124 KB |
Output is correct |
| 36 |
Incorrect |
5 ms |
2380 KB |
Output isn't correct |
| 37 |
Incorrect |
4 ms |
2380 KB |
Output isn't correct |
| 38 |
Correct |
17 ms |
2416 KB |
Output is correct |
| 39 |
Incorrect |
5 ms |
2508 KB |
Output isn't correct |
| 40 |
Incorrect |
5 ms |
2588 KB |
Output isn't correct |
| 41 |
Correct |
22 ms |
2632 KB |
Output is correct |
| 42 |
Incorrect |
6 ms |
2764 KB |
Output isn't correct |
| 43 |
Incorrect |
6 ms |
2820 KB |
Output isn't correct |
| 44 |
Correct |
30 ms |
2764 KB |
Output is correct |
| 45 |
Incorrect |
8 ms |
3020 KB |
Output isn't correct |
| 46 |
Incorrect |
9 ms |
3036 KB |
Output isn't correct |
| 47 |
Correct |
45 ms |
3020 KB |
Output is correct |
| 48 |
Incorrect |
10 ms |
3260 KB |
Output isn't correct |
| 49 |
Incorrect |
10 ms |
3148 KB |
Output isn't correct |
| 50 |
Correct |
38 ms |
3148 KB |
Output is correct |
| 51 |
Incorrect |
9 ms |
3484 KB |
Output isn't correct |
| 52 |
Incorrect |
9 ms |
3404 KB |
Output isn't correct |
| 53 |
Correct |
48 ms |
3476 KB |
Output is correct |
| 54 |
Incorrect |
12 ms |
3660 KB |
Output isn't correct |
| 55 |
Incorrect |
10 ms |
3700 KB |
Output isn't correct |
| 56 |
Correct |
55 ms |
3700 KB |
Output is correct |
| 57 |
Incorrect |
12 ms |
3916 KB |
Output isn't correct |
| 58 |
Incorrect |
13 ms |
3940 KB |
Output isn't correct |
| 59 |
Correct |
66 ms |
3936 KB |
Output is correct |
| 60 |
Incorrect |
13 ms |
4144 KB |
Output isn't correct |
| 61 |
Incorrect |
16 ms |
4172 KB |
Output isn't correct |
| 62 |
Correct |
79 ms |
4172 KB |
Output is correct |
| 63 |
Correct |
91 ms |
4120 KB |
Output is correct |
| 64 |
Incorrect |
140 ms |
4100 KB |
Output isn't correct |
| 65 |
Correct |
134 ms |
4160 KB |
Output is correct |
| 66 |
Correct |
93 ms |
4172 KB |
Output is correct |
| 67 |
Incorrect |
88 ms |
4152 KB |
Output isn't correct |
| 68 |
Correct |
55 ms |
4292 KB |
Output is correct |
| 69 |
Correct |
51 ms |
4208 KB |
Output is correct |
| 70 |
Correct |
53 ms |
4172 KB |
Output is correct |
| 71 |
Correct |
52 ms |
4200 KB |
Output is correct |
| 72 |
Incorrect |
44 ms |
4192 KB |
Output isn't correct |
| 73 |
Incorrect |
26 ms |
4588 KB |
Output isn't correct |
| 74 |
Correct |
39 ms |
4572 KB |
Output is correct |
| 75 |
Correct |
46 ms |
4568 KB |
Output is correct |
| 76 |
Correct |
45 ms |
4556 KB |
Output is correct |
| 77 |
Correct |
51 ms |
4676 KB |
Output is correct |
| 78 |
Incorrect |
46 ms |
4500 KB |
Output isn't correct |
| 79 |
Correct |
35 ms |
4528 KB |
Output is correct |
| 80 |
Correct |
42 ms |
4428 KB |
Output is correct |
| 81 |
Correct |
45 ms |
4428 KB |
Output is correct |
| 82 |
Correct |
42 ms |
4404 KB |
Output is correct |
| 83 |
Correct |
54 ms |
4428 KB |
Output is correct |
| 84 |
Correct |
66 ms |
4384 KB |
Output is correct |
| 85 |
Correct |
53 ms |
4444 KB |
Output is correct |
| 86 |
Correct |
55 ms |
4552 KB |
Output is correct |
| 87 |
Correct |
50 ms |
4428 KB |
Output is correct |
| 88 |
Correct |
54 ms |
4300 KB |
Output is correct |
| 89 |
Correct |
57 ms |
4300 KB |
Output is correct |
| 90 |
Correct |
65 ms |
4348 KB |
Output is correct |
| 91 |
Correct |
60 ms |
4420 KB |
Output is correct |
| 92 |
Correct |
48 ms |
4300 KB |
Output is correct |
