| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 53455 |
2018-06-30T05:06:45 Z |
윤교준(#1420) |
Mecho (IOI09_mecho) |
C++11 |
|
245 ms |
6556 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) 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 |
Correct |
2 ms |
504 KB |
Output is correct |
| 2 |
Correct |
2 ms |
504 KB |
Output is correct |
| 3 |
Correct |
2 ms |
504 KB |
Output is correct |
| 4 |
Correct |
2 ms |
504 KB |
Output is correct |
| 5 |
Correct |
2 ms |
520 KB |
Output is correct |
| 6 |
Correct |
2 ms |
536 KB |
Output is correct |
| 7 |
Correct |
110 ms |
6424 KB |
Output is correct |
| 8 |
Correct |
2 ms |
6424 KB |
Output is correct |
| 9 |
Correct |
2 ms |
6424 KB |
Output is correct |
| 10 |
Correct |
2 ms |
6424 KB |
Output is correct |
| 11 |
Correct |
2 ms |
6424 KB |
Output is correct |
| 12 |
Correct |
2 ms |
6424 KB |
Output is correct |
| 13 |
Correct |
3 ms |
6424 KB |
Output is correct |
| 14 |
Correct |
2 ms |
6424 KB |
Output is correct |
| 15 |
Correct |
2 ms |
6424 KB |
Output is correct |
| 16 |
Correct |
2 ms |
6424 KB |
Output is correct |
| 17 |
Correct |
2 ms |
6424 KB |
Output is correct |
| 18 |
Correct |
2 ms |
6424 KB |
Output is correct |
| 19 |
Correct |
2 ms |
6424 KB |
Output is correct |
| 20 |
Correct |
2 ms |
6424 KB |
Output is correct |
| 21 |
Correct |
2 ms |
6424 KB |
Output is correct |
| 22 |
Correct |
3 ms |
6424 KB |
Output is correct |
| 23 |
Correct |
3 ms |
6424 KB |
Output is correct |
| 24 |
Correct |
3 ms |
6424 KB |
Output is correct |
| 25 |
Correct |
2 ms |
6424 KB |
Output is correct |
| 26 |
Correct |
3 ms |
6424 KB |
Output is correct |
| 27 |
Correct |
2 ms |
6424 KB |
Output is correct |
| 28 |
Correct |
2 ms |
6424 KB |
Output is correct |
| 29 |
Correct |
2 ms |
6424 KB |
Output is correct |
| 30 |
Correct |
2 ms |
6424 KB |
Output is correct |
| 31 |
Correct |
3 ms |
6424 KB |
Output is correct |
| 32 |
Correct |
4 ms |
6424 KB |
Output is correct |
| 33 |
Correct |
6 ms |
6424 KB |
Output is correct |
| 34 |
Correct |
6 ms |
6424 KB |
Output is correct |
| 35 |
Correct |
23 ms |
6424 KB |
Output is correct |
| 36 |
Correct |
8 ms |
6424 KB |
Output is correct |
| 37 |
Correct |
7 ms |
6424 KB |
Output is correct |
| 38 |
Correct |
29 ms |
6424 KB |
Output is correct |
| 39 |
Correct |
13 ms |
6424 KB |
Output is correct |
| 40 |
Correct |
10 ms |
6424 KB |
Output is correct |
| 41 |
Correct |
56 ms |
6424 KB |
Output is correct |
| 42 |
Correct |
10 ms |
6424 KB |
Output is correct |
| 43 |
Correct |
10 ms |
6424 KB |
Output is correct |
| 44 |
Correct |
47 ms |
6424 KB |
Output is correct |
| 45 |
Correct |
12 ms |
6424 KB |
Output is correct |
| 46 |
Correct |
16 ms |
6424 KB |
Output is correct |
| 47 |
Correct |
55 ms |
6424 KB |
Output is correct |
| 48 |
Correct |
13 ms |
6424 KB |
Output is correct |
| 49 |
Correct |
13 ms |
6424 KB |
Output is correct |
| 50 |
Correct |
70 ms |
6424 KB |
Output is correct |
| 51 |
Correct |
15 ms |
6424 KB |
Output is correct |
| 52 |
Correct |
15 ms |
6424 KB |
Output is correct |
| 53 |
Correct |
90 ms |
6424 KB |
Output is correct |
| 54 |
Correct |
17 ms |
6424 KB |
Output is correct |
| 55 |
Correct |
16 ms |
6424 KB |
Output is correct |
| 56 |
Correct |
99 ms |
6424 KB |
Output is correct |
| 57 |
Correct |
26 ms |
6424 KB |
Output is correct |
| 58 |
Correct |
23 ms |
6424 KB |
Output is correct |
| 59 |
Correct |
130 ms |
6424 KB |
Output is correct |
| 60 |
Correct |
21 ms |
6424 KB |
Output is correct |
| 61 |
Correct |
22 ms |
6424 KB |
Output is correct |
| 62 |
Correct |
157 ms |
6424 KB |
Output is correct |
| 63 |
Correct |
172 ms |
6424 KB |
Output is correct |
| 64 |
Correct |
245 ms |
6424 KB |
Output is correct |
| 65 |
Correct |
175 ms |
6424 KB |
Output is correct |
| 66 |
Correct |
152 ms |
6424 KB |
Output is correct |
| 67 |
Correct |
37 ms |
6424 KB |
Output is correct |
| 68 |
Correct |
53 ms |
6424 KB |
Output is correct |
| 69 |
Correct |
52 ms |
6424 KB |
Output is correct |
| 70 |
Correct |
49 ms |
6424 KB |
Output is correct |
| 71 |
Correct |
46 ms |
6424 KB |
Output is correct |
| 72 |
Correct |
35 ms |
6424 KB |
Output is correct |
| 73 |
Correct |
42 ms |
6424 KB |
Output is correct |
| 74 |
Correct |
70 ms |
6424 KB |
Output is correct |
| 75 |
Correct |
78 ms |
6500 KB |
Output is correct |
| 76 |
Correct |
73 ms |
6500 KB |
Output is correct |
| 77 |
Correct |
95 ms |
6500 KB |
Output is correct |
| 78 |
Correct |
31 ms |
6500 KB |
Output is correct |
| 79 |
Correct |
65 ms |
6500 KB |
Output is correct |
| 80 |
Correct |
70 ms |
6500 KB |
Output is correct |
| 81 |
Correct |
77 ms |
6500 KB |
Output is correct |
| 82 |
Correct |
67 ms |
6500 KB |
Output is correct |
| 83 |
Correct |
94 ms |
6500 KB |
Output is correct |
| 84 |
Correct |
122 ms |
6500 KB |
Output is correct |
| 85 |
Correct |
117 ms |
6500 KB |
Output is correct |
| 86 |
Correct |
96 ms |
6556 KB |
Output is correct |
| 87 |
Correct |
90 ms |
6556 KB |
Output is correct |
| 88 |
Correct |
94 ms |
6556 KB |
Output is correct |
| 89 |
Correct |
113 ms |
6556 KB |
Output is correct |
| 90 |
Correct |
108 ms |
6556 KB |
Output is correct |
| 91 |
Correct |
103 ms |
6556 KB |
Output is correct |
| 92 |
Correct |
127 ms |
6556 KB |
Output is correct |
