| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 53475 |
2018-06-30T05:41:44 Z |
장홍준(#2017) |
Mecho (IOI09_mecho) |
C++11 |
|
754 ms |
3684 KB |
#include<stdio.h>
#include<deque>
#include<vector>
using namespace std;
int n, S;
char M[818][818], NM[818][818];
int dx[4] = { 1,-1,0,0 };
int dy[4] = { 0,0,1,-1 };
vector<int>Qhx, Qhy;
void spread() {
int i, j;
vector<int>Qnx, Qny;
for(i=0;i<Qhx.size();i++){
int nowx = Qhx[i], nowy = Qhy[i];
for (int k = 0; k < 4; k++) {
int nx = nowx + dx[k], ny = nowy + dy[k];
if (nx <= 0 || ny <= 0 || nx > n || ny > n)continue;
if (NM[nx][ny] != 'T'&&NM[nx][ny] != 'H' && NM[nx][ny]!='D') {
NM[nx][ny] = 'H';
Qnx.push_back(nx); Qny.push_back(ny);
}
}
}
Qhx.clear(); Qhy.clear();
for (i = 0; i < Qnx.size(); i++) {
Qhx.push_back(Qnx[i]);
Qhy.push_back(Qny[i]);
}
}
bool is_gone[818][818];
void printnm() { for (int i = 1; i <= n; i++) { for (int j = 1; j <= n; j++)printf("%c", NM[i][j]); printf("\n"); }printf("\n"); }
int f(int x) {
Qhx.clear(); Qhy.clear();
int i, j, sx, sy, ex, ey, nxt;
deque<int>qx, qy, qd;
for (i = 1; i <= n; i++)for (j = 1; j <= n; j++) {
if (M[i][j] == 'M')sx = i, sy = j;
if (M[i][j] == 'D')ex = i, ey = j;
if (M[i][j] == 'H')Qhx.push_back(i), Qhy.push_back(j);
NM[i][j] = M[i][j];
is_gone[i][j] = 0;
}
for (i = 0; i < x; i++)spread();
qx.push_back(sx); qy.push_back(sy); qd.push_back(0);
nxt = S;
while (!qx.empty()) {
int nowx = qx.front(); qx.pop_front();
int nowy = qy.front(); qy.pop_front();
int nowd = qd.front(); qd.pop_front();
if (nowd == nxt)
spread(), nxt += S;
if (NM[nowx][nowy] == 'H')continue;
for (i = 0; i < 4; i++) {
int nx = nowx + dx[i], ny = nowy + dy[i];
if (nx <= 0 || ny <= 0 || nx > n || ny > n)continue;
if (is_gone[nx][ny])continue;
if (NM[nx][ny] == 'H')continue;
if (NM[nx][ny] == 'T')continue;
qx.push_back(nx); qy.push_back(ny); qd.push_back(nowd + 1);
if (nx == ex&&ny == ey)return 1;
is_gone[nx][ny] = 1;
}
}
return 0;
}
int main() {
int i, j, s, e, ans = -1;
scanf("%d%d", &n, &S);
for (i = 1; i <= n; i++)for (j = 1; j <= n; j++)scanf(" %c", &M[i][j]);
s = 0, e = n * n;
while (s <= e) {
int m = (s + e) / 2;
int k = f(m);
if (k)s = m + 1, ans = m;
else e = m - 1;
}
printf("%d", ans);
return 0;
}
Compilation message
mecho.cpp: In function 'void spread()':
mecho.cpp:13:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(i=0;i<Qhx.size();i++){
~^~~~~~~~~~~
mecho.cpp:25:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for (i = 0; i < Qnx.size(); i++) {
~~^~~~~~~~~~~~
mecho.cpp:11:9: warning: unused variable 'j' [-Wunused-variable]
int i, j;
^
mecho.cpp: In function 'int main()':
mecho.cpp:68:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d", &n, &S);
~~~~~^~~~~~~~~~~~~~~~
mecho.cpp:69:55: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
for (i = 1; i <= n; i++)for (j = 1; j <= n; j++)scanf(" %c", &M[i][j]);
~~~~~^~~~~~~~~~~~~~~~~
mecho.cpp: In function 'int f(int)':
mecho.cpp:60:16: warning: 'ey' may be used uninitialized in this function [-Wmaybe-uninitialized]
if (nx == ex&&ny == ey)return 1;
~~~~~~~~^~~~~~~~~~
mecho.cpp:60:4: warning: 'ex' may be used uninitialized in this function [-Wmaybe-uninitialized]
if (nx == ex&&ny == ey)return 1;
^~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
376 KB |
Output is correct |
| 2 |
Correct |
2 ms |
504 KB |
Output is correct |
| 3 |
Correct |
2 ms |
568 KB |
Output is correct |
| 4 |
Correct |
2 ms |
576 KB |
Output is correct |
| 5 |
Correct |
2 ms |
584 KB |
Output is correct |
| 6 |
Correct |
2 ms |
584 KB |
Output is correct |
| 7 |
Correct |
386 ms |
2784 KB |
Output is correct |
| 8 |
Correct |
2 ms |
2784 KB |
Output is correct |
| 9 |
Correct |
2 ms |
2784 KB |
Output is correct |
| 10 |
Correct |
3 ms |
2784 KB |
Output is correct |
| 11 |
Correct |
2 ms |
2784 KB |
Output is correct |
| 12 |
Correct |
4 ms |
2784 KB |
Output is correct |
| 13 |
Correct |
3 ms |
2784 KB |
Output is correct |
| 14 |
Correct |
5 ms |
2784 KB |
Output is correct |
| 15 |
Correct |
2 ms |
2784 KB |
Output is correct |
| 16 |
Correct |
2 ms |
2784 KB |
Output is correct |
| 17 |
Correct |
2 ms |
2784 KB |
Output is correct |
| 18 |
Correct |
2 ms |
2784 KB |
Output is correct |
| 19 |
Correct |
2 ms |
2784 KB |
Output is correct |
| 20 |
Correct |
3 ms |
2784 KB |
Output is correct |
| 21 |
Correct |
3 ms |
2784 KB |
Output is correct |
| 22 |
Correct |
4 ms |
2784 KB |
Output is correct |
| 23 |
Correct |
4 ms |
2784 KB |
Output is correct |
| 24 |
Correct |
4 ms |
2784 KB |
Output is correct |
| 25 |
Correct |
7 ms |
2784 KB |
Output is correct |
| 26 |
Correct |
5 ms |
2784 KB |
Output is correct |
| 27 |
Correct |
5 ms |
2784 KB |
Output is correct |
| 28 |
Correct |
6 ms |
2784 KB |
Output is correct |
| 29 |
Correct |
6 ms |
2784 KB |
Output is correct |
| 30 |
Correct |
7 ms |
2784 KB |
Output is correct |
| 31 |
Correct |
6 ms |
2784 KB |
Output is correct |
| 32 |
Correct |
7 ms |
2784 KB |
Output is correct |
| 33 |
Correct |
122 ms |
2784 KB |
Output is correct |
| 34 |
Correct |
121 ms |
2784 KB |
Output is correct |
| 35 |
Correct |
59 ms |
2784 KB |
Output is correct |
| 36 |
Correct |
146 ms |
2784 KB |
Output is correct |
| 37 |
Correct |
178 ms |
2784 KB |
Output is correct |
| 38 |
Correct |
101 ms |
2784 KB |
Output is correct |
| 39 |
Correct |
185 ms |
2784 KB |
Output is correct |
| 40 |
Correct |
352 ms |
2784 KB |
Output is correct |
| 41 |
Correct |
158 ms |
2784 KB |
Output is correct |
| 42 |
Correct |
238 ms |
2784 KB |
Output is correct |
| 43 |
Correct |
249 ms |
2784 KB |
Output is correct |
| 44 |
Correct |
154 ms |
2784 KB |
Output is correct |
| 45 |
Correct |
329 ms |
2784 KB |
Output is correct |
| 46 |
Correct |
307 ms |
2784 KB |
Output is correct |
| 47 |
Correct |
152 ms |
2784 KB |
Output is correct |
| 48 |
Correct |
362 ms |
2784 KB |
Output is correct |
| 49 |
Correct |
370 ms |
2784 KB |
Output is correct |
| 50 |
Correct |
163 ms |
2784 KB |
Output is correct |
| 51 |
Correct |
496 ms |
2784 KB |
Output is correct |
| 52 |
Correct |
498 ms |
2784 KB |
Output is correct |
| 53 |
Correct |
232 ms |
2784 KB |
Output is correct |
| 54 |
Correct |
511 ms |
2784 KB |
Output is correct |
| 55 |
Correct |
530 ms |
2784 KB |
Output is correct |
| 56 |
Correct |
282 ms |
2784 KB |
Output is correct |
| 57 |
Correct |
754 ms |
2784 KB |
Output is correct |
| 58 |
Correct |
604 ms |
2784 KB |
Output is correct |
| 59 |
Correct |
316 ms |
2784 KB |
Output is correct |
| 60 |
Correct |
706 ms |
2784 KB |
Output is correct |
| 61 |
Correct |
691 ms |
2784 KB |
Output is correct |
| 62 |
Correct |
340 ms |
2784 KB |
Output is correct |
| 63 |
Correct |
489 ms |
2784 KB |
Output is correct |
| 64 |
Correct |
481 ms |
2784 KB |
Output is correct |
| 65 |
Correct |
437 ms |
2784 KB |
Output is correct |
| 66 |
Correct |
489 ms |
2784 KB |
Output is correct |
| 67 |
Correct |
524 ms |
2784 KB |
Output is correct |
| 68 |
Correct |
451 ms |
2784 KB |
Output is correct |
| 69 |
Correct |
381 ms |
2784 KB |
Output is correct |
| 70 |
Correct |
459 ms |
2784 KB |
Output is correct |
| 71 |
Correct |
445 ms |
2784 KB |
Output is correct |
| 72 |
Correct |
503 ms |
2784 KB |
Output is correct |
| 73 |
Correct |
335 ms |
3656 KB |
Output is correct |
| 74 |
Correct |
415 ms |
3656 KB |
Output is correct |
| 75 |
Correct |
432 ms |
3656 KB |
Output is correct |
| 76 |
Correct |
405 ms |
3656 KB |
Output is correct |
| 77 |
Correct |
412 ms |
3684 KB |
Output is correct |
| 78 |
Correct |
421 ms |
3684 KB |
Output is correct |
| 79 |
Correct |
472 ms |
3684 KB |
Output is correct |
| 80 |
Correct |
460 ms |
3684 KB |
Output is correct |
| 81 |
Correct |
432 ms |
3684 KB |
Output is correct |
| 82 |
Correct |
410 ms |
3684 KB |
Output is correct |
| 83 |
Correct |
407 ms |
3684 KB |
Output is correct |
| 84 |
Correct |
398 ms |
3684 KB |
Output is correct |
| 85 |
Correct |
418 ms |
3684 KB |
Output is correct |
| 86 |
Correct |
408 ms |
3684 KB |
Output is correct |
| 87 |
Correct |
431 ms |
3684 KB |
Output is correct |
| 88 |
Correct |
469 ms |
3684 KB |
Output is correct |
| 89 |
Correct |
418 ms |
3684 KB |
Output is correct |
| 90 |
Correct |
434 ms |
3684 KB |
Output is correct |
| 91 |
Correct |
485 ms |
3684 KB |
Output is correct |
| 92 |
Correct |
485 ms |
3684 KB |
Output is correct |
