| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 53483 |
2018-06-30T05:48:23 Z |
시제연(#2016) |
Mecho (IOI09_mecho) |
C++11 |
|
200 ms |
6536 KB |
#include <bits/stdc++.h>
using namespace std;
using pii = pair<int, int>;
#define X first
#define Y second
const int N = 805, INF = int(1e9), dx[] = {1, -1, 0, 0}, dy[] = {0, 0, 1, -1};
int n, s, d[N][N], e[N][N], sx, sy, ex, ey;
queue<pii> q;
char b[N][N];
int f(int x){
q.push({sx, sy});
for(int i = 1; i <= n; i++) fill(e[i] + 1, e[i] + n + 1, INF);
e[sx][sy] = 0;
while(!q.empty()){
pii c = q.front();
q.pop();
for(int i = 0; i < 4; i++){
pii nx = {c.X + dx[i], c.Y + dy[i]};
if(nx.X < 1 || nx.X > n || nx.Y < 1 || nx.Y > n) continue;
if(b[nx.X][nx.Y] != 'G' && b[nx.X][nx.Y] != 'D') continue;
if(e[nx.X][nx.Y] <= e[c.X][c.Y] + 1) continue;
if((e[c.X][c.Y] + 1) / s >= d[nx.X][nx.Y] - x) continue;
e[nx.X][nx.Y] = e[c.X][c.Y] + 1;
q.push(nx);
}
}
return (e[ex][ey] != INF);
}
int main(){
scanf("%d%d", &n, &s);
for(int i = 1; i <= n; i++) scanf("%s", b[i] + 1);
for(int i = 1; i <= n; i++) fill(d[i] + 1, d[i] + n + 1, INF);
for(int i = 1; i <= n; i++){
for(int j = 1; j <= n; j++){
if(b[i][j] == 'H'){ q.push({i, j}); d[i][j] = 0; }
else if(b[i][j] == 'M'){ sx = i; sy = j; }
else if(b[i][j] == 'D'){ ex = i; ey = j; }
}
}
while(!q.empty()){
pii c = q.front();
q.pop();
for(int i = 0; i < 4; i++){
pii nx = {c.X + dx[i], c.Y + dy[i]};
if(nx.X < 1 || nx.X > n || nx.Y < 1 || nx.Y > n) continue;
if(b[nx.X][nx.Y] != 'G' && b[nx.X][nx.Y] != 'M') continue;
if(d[nx.X][nx.Y] <= d[c.X][c.Y] + 1) continue;
d[nx.X][nx.Y] = d[c.X][c.Y] + 1;
q.push(nx);
}
}
int l = 0, r = d[sx][sy] - 1;
while(l <= r){
int m = (l + r) / 2;
if(f(m)) l = m + 1;
else r = m - 1;
}
printf("%d\n", r);
}
Compilation message
mecho.cpp: In function 'int main()':
mecho.cpp:35:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d", &n, &s);
~~~~~^~~~~~~~~~~~~~~~
mecho.cpp:36:38: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
for(int i = 1; i <= n; i++) scanf("%s", b[i] + 1);
~~~~~^~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
380 KB |
Output is correct |
| 2 |
Correct |
2 ms |
448 KB |
Output is correct |
| 3 |
Correct |
2 ms |
448 KB |
Output is correct |
| 4 |
Correct |
2 ms |
596 KB |
Output is correct |
| 5 |
Correct |
2 ms |
672 KB |
Output is correct |
| 6 |
Correct |
2 ms |
672 KB |
Output is correct |
| 7 |
Correct |
107 ms |
6380 KB |
Output is correct |
| 8 |
Correct |
2 ms |
6380 KB |
Output is correct |
| 9 |
Correct |
2 ms |
6380 KB |
Output is correct |
| 10 |
Correct |
2 ms |
6380 KB |
Output is correct |
| 11 |
Correct |
3 ms |
6380 KB |
Output is correct |
| 12 |
Correct |
4 ms |
6380 KB |
Output is correct |
| 13 |
Correct |
2 ms |
6380 KB |
Output is correct |
| 14 |
Correct |
2 ms |
6380 KB |
Output is correct |
| 15 |
Correct |
2 ms |
6380 KB |
Output is correct |
| 16 |
Correct |
2 ms |
6380 KB |
Output is correct |
| 17 |
Correct |
2 ms |
6380 KB |
Output is correct |
| 18 |
Correct |
3 ms |
6380 KB |
Output is correct |
| 19 |
Correct |
2 ms |
6380 KB |
Output is correct |
| 20 |
Correct |
2 ms |
6380 KB |
Output is correct |
| 21 |
Correct |
3 ms |
6380 KB |
Output is correct |
| 22 |
Correct |
3 ms |
6380 KB |
Output is correct |
| 23 |
Correct |
2 ms |
6380 KB |
Output is correct |
| 24 |
Correct |
2 ms |
6380 KB |
Output is correct |
| 25 |
Correct |
2 ms |
6380 KB |
Output is correct |
| 26 |
Correct |
2 ms |
6380 KB |
Output is correct |
| 27 |
Correct |
3 ms |
6380 KB |
Output is correct |
| 28 |
Correct |
3 ms |
6380 KB |
Output is correct |
| 29 |
Correct |
3 ms |
6380 KB |
Output is correct |
| 30 |
Correct |
2 ms |
6380 KB |
Output is correct |
| 31 |
Correct |
3 ms |
6380 KB |
Output is correct |
| 32 |
Correct |
2 ms |
6380 KB |
Output is correct |
| 33 |
Correct |
8 ms |
6380 KB |
Output is correct |
| 34 |
Correct |
8 ms |
6380 KB |
Output is correct |
| 35 |
Correct |
33 ms |
6380 KB |
Output is correct |
| 36 |
Correct |
11 ms |
6380 KB |
Output is correct |
| 37 |
Correct |
10 ms |
6380 KB |
Output is correct |
| 38 |
Correct |
51 ms |
6380 KB |
Output is correct |
| 39 |
Correct |
10 ms |
6380 KB |
Output is correct |
| 40 |
Correct |
14 ms |
6380 KB |
Output is correct |
| 41 |
Correct |
38 ms |
6380 KB |
Output is correct |
| 42 |
Correct |
13 ms |
6380 KB |
Output is correct |
| 43 |
Correct |
13 ms |
6380 KB |
Output is correct |
| 44 |
Correct |
48 ms |
6380 KB |
Output is correct |
| 45 |
Correct |
17 ms |
6380 KB |
Output is correct |
| 46 |
Correct |
15 ms |
6380 KB |
Output is correct |
| 47 |
Correct |
58 ms |
6380 KB |
Output is correct |
| 48 |
Correct |
16 ms |
6380 KB |
Output is correct |
| 49 |
Correct |
17 ms |
6380 KB |
Output is correct |
| 50 |
Correct |
83 ms |
6380 KB |
Output is correct |
| 51 |
Correct |
18 ms |
6380 KB |
Output is correct |
| 52 |
Correct |
22 ms |
6380 KB |
Output is correct |
| 53 |
Correct |
82 ms |
6380 KB |
Output is correct |
| 54 |
Correct |
21 ms |
6380 KB |
Output is correct |
| 55 |
Correct |
23 ms |
6380 KB |
Output is correct |
| 56 |
Correct |
97 ms |
6380 KB |
Output is correct |
| 57 |
Correct |
27 ms |
6380 KB |
Output is correct |
| 58 |
Correct |
25 ms |
6380 KB |
Output is correct |
| 59 |
Correct |
118 ms |
6380 KB |
Output is correct |
| 60 |
Correct |
26 ms |
6380 KB |
Output is correct |
| 61 |
Correct |
28 ms |
6380 KB |
Output is correct |
| 62 |
Correct |
151 ms |
6380 KB |
Output is correct |
| 63 |
Correct |
119 ms |
6380 KB |
Output is correct |
| 64 |
Correct |
200 ms |
6396 KB |
Output is correct |
| 65 |
Correct |
190 ms |
6396 KB |
Output is correct |
| 66 |
Correct |
139 ms |
6396 KB |
Output is correct |
| 67 |
Correct |
130 ms |
6396 KB |
Output is correct |
| 68 |
Correct |
53 ms |
6396 KB |
Output is correct |
| 69 |
Correct |
46 ms |
6396 KB |
Output is correct |
| 70 |
Correct |
44 ms |
6396 KB |
Output is correct |
| 71 |
Correct |
34 ms |
6396 KB |
Output is correct |
| 72 |
Correct |
35 ms |
6396 KB |
Output is correct |
| 73 |
Correct |
40 ms |
6476 KB |
Output is correct |
| 74 |
Correct |
68 ms |
6536 KB |
Output is correct |
| 75 |
Correct |
64 ms |
6536 KB |
Output is correct |
| 76 |
Correct |
72 ms |
6536 KB |
Output is correct |
| 77 |
Correct |
69 ms |
6536 KB |
Output is correct |
| 78 |
Correct |
80 ms |
6536 KB |
Output is correct |
| 79 |
Correct |
61 ms |
6536 KB |
Output is correct |
| 80 |
Correct |
69 ms |
6536 KB |
Output is correct |
| 81 |
Correct |
74 ms |
6536 KB |
Output is correct |
| 82 |
Correct |
68 ms |
6536 KB |
Output is correct |
| 83 |
Correct |
91 ms |
6536 KB |
Output is correct |
| 84 |
Correct |
72 ms |
6536 KB |
Output is correct |
| 85 |
Correct |
75 ms |
6536 KB |
Output is correct |
| 86 |
Correct |
84 ms |
6536 KB |
Output is correct |
| 87 |
Correct |
85 ms |
6536 KB |
Output is correct |
| 88 |
Correct |
90 ms |
6536 KB |
Output is correct |
| 89 |
Correct |
99 ms |
6536 KB |
Output is correct |
| 90 |
Correct |
101 ms |
6536 KB |
Output is correct |
| 91 |
Correct |
96 ms |
6536 KB |
Output is correct |
| 92 |
Correct |
103 ms |
6536 KB |
Output is correct |
