# |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
53454 |
2018-06-30T05:01:52 Z |
윤교준(#1420) |
Mecho (IOI09_mecho) |
C++11 |
|
234 ms |
6552 KB |
#include <bits/stdc++.h>
#define rf(x) (x)=0;while(*p<48)p++;while(47<*p)(x)=((x)<<3)+((x)<<1)+(*p++&15);
//#define rf(x) (x)=0;while(*p<48)im=*p=='-';while(47<*p)(x)=((x)<<3)+((x)<<1)+(*p++&15);if(im)(x)=-(x);
#define pb push_back
#define eb emplace_back
#define sz(V) ((int)(V).size())
#define allv(V) ((V).begin()),((V).end())
#define befv(V) ((V)[(sz(V)-2)])
#define sorv(V) sort(allv(V))
#define revv(V) reverse(allv(V))
#define univ(V) (V).erase(unique(allv(V)),(V).end())
#define clv(V) (V).clear()
#define upmin(a,b) (a)=min((a),(b))
#define upmax(a,b) (a)=max((a),(b))
#define rb(x) ((x)&(-(x)))
#define cb(x) (x)=(!(x))
#define INF (0x3f3f3f3f)
#define INFLL (0x3f3f3f3f3f3f3f3fll)
#define INFST (0x7f7f7f7f)
#define INFLLST (0x7f7f7f7f7f7f7f7fll)
using namespace std;
typedef long long ll;
typedef __int128_t lll;
typedef unsigned long long ull;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef pair<int, ll> pil;
typedef pair<ll, int> pli;
typedef pair<ld, ld> pdd;
typedef complex<ld> base;
const ld EPS = (ld)1e-7;
const ld PI = acos(0) * 2;
bool isZero(const ld& x) { return abs(x) <= EPS; }
int sign(const ld& x) { return isZero(x) ? 0 : (0 < x ? 1 : -1); }
ll gcd(ll a, ll b) { for(;b;a%=b,swap(a,b)){} return abs(a); }
pll operator + (const pll& a, const pll& b) { return pll(a.first+b.first, a.second+b.second); }
pll operator - (const pll& a, const pll& b) { return pll(a.first-b.first, a.second-b.second); }
pll operator * (const pll& a, const ll& b) { return pll(a.first*b, a.second*b); }
ll operator * (const pll& a, const pll& b) { return a.first*b.second - b.first*a.second; }
ll ccw(const pll& a, const pll& b, const pll& c) { return a*b + b*c + c*a; }
int rd(int s, int e) { return rand()%(e-s+1) + s; }
void fg(vector<int> G[], int a, int b) { G[a].pb(b); G[b].pb(a); }
void fg(vector<pii> G[], int a, int b, int c) { G[a].pb({b, c}); G[b].pb({a, c}); }
const int dx[] = {0, 1, 0, -1}, dy[] = {1, 0, -1, 0};
const int MAXN = 805;
int B[MAXN][MAXN], C[MAXN][MAXN];
char A[MAXN][MAXN];
int Sy, Sx, Ey, Ex;
int N, K;
bool f(int t) {
if(B[Sy][Sx] <= t) return false;
for(int i = 0; i <= N; i++)
fill(C[i], C[i]+N+1, INF);
C[Sy][Sx] = t * K;
queue<pii> PQ;
PQ.push(pii(Sy, Sx));
for(int y, x, dst; !PQ.empty(); PQ.pop()) {
tie(y, x) = PQ.front();
dst = C[y][x] + 1;
//printf("t=%d, dst=%d, %d %d\n", t, dst-1, y, x);
for(int dr = 0; dr < 4; dr++) {
int ny = y+dy[dr], nx = x+dx[dr];
if('G' != A[ny][nx] && 'D' != A[ny][nx]) continue;
if(C[ny][nx] <= dst) continue;
if(B[ny][nx] < (dst + K - 1) / K) continue;
C[ny][nx] = dst;
PQ.push(pii(ny, nx));
if(Ey == ny && Ex == nx)
return true;
}
}
return false;
}
int getAns() {
int s = 0, e = N*N+55; for(int m; s < e;) {
m = (s+e+1)/2;
//printf("TRY %d : %d\n", m, f(m));
if(f(m)) s = m;
else e = m-1;
}
return s;
}
int main() {
scanf("%d%d", &N, &K);
for(int i = 1; i <= N; i++) {
scanf(" %s", A[i]+1);
for(int j = 1; j <= N; j++) {
if('M' == A[i][j]) {
Sy = i; Sx = j;
A[i][j] = 'G';
} else if('D' == A[i][j]) {
Ey = i; Ex = j;
}
}
}
{
for(int i = 1; i <= N; i++)
fill(B[i], B[i]+N+1, INF);
queue<pii> PQ;
for(int i = 1; i <= N; i++) for(int j = 1; j <= N; j++)
if('H' == A[i][j]) {
PQ.push(pii(i, j));
B[i][j] = 0;
}
for(int y, x, dst; !PQ.empty(); PQ.pop()) {
tie(y, x) = PQ.front();
dst = B[y][x] + 1;
for(int dr = 0; dr < 4; dr++) {
int ny = y+dy[dr], nx = x+dx[dr];
if('G' != A[ny][nx] || B[ny][nx] <= dst) continue;
B[ny][nx] = dst;
PQ.push(pii(ny, nx));
}
}
}
/*
for(int i = 1; i <= N; i++) {
for(int j = 1; j <= N; j++)
printf("%d ", B[i][j]);
puts("");
}
*/
if(!f(0)) {
puts("-1");
return 0;
}
cout << getAns() << endl;
return 0;
}
Compilation message
mecho.cpp: In function 'int main()':
mecho.cpp:99:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d", &N, &K);
~~~~~^~~~~~~~~~~~~~~~
mecho.cpp:101:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf(" %s", A[i]+1);
~~~~~^~~~~~~~~~~~~~~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
2 ms |
376 KB |
Output isn't correct |
2 |
Incorrect |
2 ms |
376 KB |
Output isn't correct |
3 |
Incorrect |
2 ms |
428 KB |
Output isn't correct |
4 |
Incorrect |
2 ms |
508 KB |
Output isn't correct |
5 |
Correct |
2 ms |
560 KB |
Output is correct |
6 |
Correct |
2 ms |
560 KB |
Output is correct |
7 |
Correct |
106 ms |
6320 KB |
Output is correct |
8 |
Incorrect |
2 ms |
6320 KB |
Output isn't correct |
9 |
Correct |
2 ms |
6320 KB |
Output is correct |
10 |
Correct |
2 ms |
6320 KB |
Output is correct |
11 |
Correct |
2 ms |
6320 KB |
Output is correct |
12 |
Correct |
2 ms |
6320 KB |
Output is correct |
13 |
Correct |
2 ms |
6320 KB |
Output is correct |
14 |
Correct |
2 ms |
6320 KB |
Output is correct |
15 |
Incorrect |
2 ms |
6320 KB |
Output isn't correct |
16 |
Correct |
2 ms |
6320 KB |
Output is correct |
17 |
Incorrect |
2 ms |
6320 KB |
Output isn't correct |
18 |
Correct |
2 ms |
6320 KB |
Output is correct |
19 |
Incorrect |
2 ms |
6320 KB |
Output isn't correct |
20 |
Correct |
2 ms |
6320 KB |
Output is correct |
21 |
Incorrect |
2 ms |
6320 KB |
Output isn't correct |
22 |
Correct |
2 ms |
6320 KB |
Output is correct |
23 |
Incorrect |
2 ms |
6320 KB |
Output isn't correct |
24 |
Correct |
3 ms |
6320 KB |
Output is correct |
25 |
Incorrect |
2 ms |
6320 KB |
Output isn't correct |
26 |
Correct |
2 ms |
6320 KB |
Output is correct |
27 |
Incorrect |
2 ms |
6320 KB |
Output isn't correct |
28 |
Correct |
2 ms |
6320 KB |
Output is correct |
29 |
Incorrect |
2 ms |
6320 KB |
Output isn't correct |
30 |
Correct |
2 ms |
6320 KB |
Output is correct |
31 |
Incorrect |
2 ms |
6320 KB |
Output isn't correct |
32 |
Correct |
2 ms |
6320 KB |
Output is correct |
33 |
Incorrect |
6 ms |
6320 KB |
Output isn't correct |
34 |
Correct |
7 ms |
6320 KB |
Output is correct |
35 |
Correct |
23 ms |
6320 KB |
Output is correct |
36 |
Incorrect |
8 ms |
6320 KB |
Output isn't correct |
37 |
Correct |
7 ms |
6320 KB |
Output is correct |
38 |
Correct |
31 ms |
6320 KB |
Output is correct |
39 |
Incorrect |
9 ms |
6320 KB |
Output isn't correct |
40 |
Correct |
11 ms |
6320 KB |
Output is correct |
41 |
Correct |
44 ms |
6320 KB |
Output is correct |
42 |
Incorrect |
10 ms |
6320 KB |
Output isn't correct |
43 |
Correct |
10 ms |
6320 KB |
Output is correct |
44 |
Correct |
54 ms |
6320 KB |
Output is correct |
45 |
Incorrect |
12 ms |
6320 KB |
Output isn't correct |
46 |
Correct |
12 ms |
6320 KB |
Output is correct |
47 |
Correct |
65 ms |
6320 KB |
Output is correct |
48 |
Incorrect |
14 ms |
6320 KB |
Output isn't correct |
49 |
Correct |
14 ms |
6320 KB |
Output is correct |
50 |
Correct |
80 ms |
6320 KB |
Output is correct |
51 |
Incorrect |
17 ms |
6320 KB |
Output isn't correct |
52 |
Correct |
15 ms |
6320 KB |
Output is correct |
53 |
Correct |
104 ms |
6320 KB |
Output is correct |
54 |
Incorrect |
17 ms |
6320 KB |
Output isn't correct |
55 |
Correct |
16 ms |
6320 KB |
Output is correct |
56 |
Correct |
115 ms |
6320 KB |
Output is correct |
57 |
Incorrect |
21 ms |
6320 KB |
Output isn't correct |
58 |
Correct |
24 ms |
6320 KB |
Output is correct |
59 |
Correct |
176 ms |
6320 KB |
Output is correct |
60 |
Incorrect |
21 ms |
6320 KB |
Output isn't correct |
61 |
Correct |
21 ms |
6320 KB |
Output is correct |
62 |
Correct |
151 ms |
6320 KB |
Output is correct |
63 |
Correct |
136 ms |
6320 KB |
Output is correct |
64 |
Correct |
234 ms |
6320 KB |
Output is correct |
65 |
Correct |
186 ms |
6396 KB |
Output is correct |
66 |
Incorrect |
159 ms |
6396 KB |
Output isn't correct |
67 |
Correct |
37 ms |
6396 KB |
Output is correct |
68 |
Correct |
58 ms |
6396 KB |
Output is correct |
69 |
Correct |
55 ms |
6396 KB |
Output is correct |
70 |
Correct |
53 ms |
6396 KB |
Output is correct |
71 |
Correct |
46 ms |
6396 KB |
Output is correct |
72 |
Correct |
34 ms |
6396 KB |
Output is correct |
73 |
Correct |
49 ms |
6436 KB |
Output is correct |
74 |
Correct |
76 ms |
6436 KB |
Output is correct |
75 |
Correct |
85 ms |
6436 KB |
Output is correct |
76 |
Correct |
82 ms |
6436 KB |
Output is correct |
77 |
Correct |
89 ms |
6436 KB |
Output is correct |
78 |
Correct |
53 ms |
6512 KB |
Output is correct |
79 |
Correct |
68 ms |
6512 KB |
Output is correct |
80 |
Correct |
74 ms |
6528 KB |
Output is correct |
81 |
Correct |
84 ms |
6528 KB |
Output is correct |
82 |
Correct |
84 ms |
6528 KB |
Output is correct |
83 |
Correct |
122 ms |
6528 KB |
Output is correct |
84 |
Correct |
116 ms |
6552 KB |
Output is correct |
85 |
Correct |
96 ms |
6552 KB |
Output is correct |
86 |
Correct |
102 ms |
6552 KB |
Output is correct |
87 |
Correct |
96 ms |
6552 KB |
Output is correct |
88 |
Correct |
99 ms |
6552 KB |
Output is correct |
89 |
Correct |
117 ms |
6552 KB |
Output is correct |
90 |
Correct |
114 ms |
6552 KB |
Output is correct |
91 |
Correct |
105 ms |
6552 KB |
Output is correct |
92 |
Correct |
104 ms |
6552 KB |
Output is correct |