| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 492199 |
2021-12-05T23:28:38 Z |
Evang |
Mecho (IOI09_mecho) |
C++17 |
|
442 ms |
6668 KB |
#include <bits/stdc++.h>
using namespace std;
#ifdef _DEBUG
#define dout(x) clog << "Line " << __LINE__ << ": " << #x << "=" << (x) << el
#else
#define dout(x)
#endif
#define mp(a, b) make_pair(a, b)
#define mt(args...) make_tuple(args)
#define pb(x) push_back(x)
#define eb(args...) emplace_back(args)
#define ff first
#define ss second
#define DIE exit(0)
template<typename T>
using vc = vector<T>;
template<typename T>
using uset = unordered_set<T>;
template<typename A, typename B>
using umap = unordered_map<A, B>;
template<typename T, typename Comp>
using pq = std::priority_queue<T, vc<T>, Comp>;
template<typename T>
using maxpq = pq<T, less<T>>;
template<typename T>
using minpq = pq<T, greater<T>>;
using db = double;
using ld = long double;
using ll = long long;
using ull = unsigned long long;
using pi = pair<int, int>;
using pll = pair<ll, ll>;
using vi = vc<int>;
using vll = vc<ll>;
using vpi = vc<pi>;
using vpll = vc<pll>;
using str = string;
constexpr char el = '\n';
constexpr char sp = ' ';
constexpr int inf = 0x3f3f3f3f;
constexpr ll llinf = 0x3f3f3f3f3f3f3f3fLL;
// ---------------------------------------------------------------------
const int N = 805;
int n, s, b[N][N], m[N][N];
int dr[] = {0, 0, -1, 1};
int dc[] = {-1, 1, 0, 0};
char a[N][N];
pi st;
vpi h;
bool good(int r, int c){
return 0 <= r && r < n && 0 <= c && c < n;
}
bool ok(int t){
dout(t);
memset(b, -1, sizeof b);
memset(m, -1, sizeof m);
queue<pi> q;
for(auto x: h){
q.push(x);
b[x.ff][x.ss] = 0;
}
while(!q.empty()){
auto[r, c] = q.front();
if(b[r][c]==t)
break;
q.pop();
for(int i = 0; i < 4; ++i){
int r2 = r + dr[i];
int c2 = c + dc[i];
if(good(r2, c2)&&(a[r2][c2]=='M'||a[r2][c2]=='G')&&b[r2][c2]==-1){
b[r2][c2] = b[r][c] + 1;
q.emplace(r2, c2);
}
}
}
#ifdef _DEBUG
clog << "Line " << __LINE__ << ":\n";
for(int i = 0; i < n; ++i){
for(int j = 0; j < n; ++j)
clog << b[i][j] << sp;
clog << el;
}
clog << el;
#endif
queue<pi> q2; // mecho
q2.push(st);
m[st.ff][st.ss] = 0;
int t2 = t;
while(!q2.empty()){
t2++;
while(!q2.empty()){
auto[r, c] = q2.front();
if(m[r][c]==(t2-t)*s)
break;
q2.pop();
if(~b[r][c])
continue;
for(int i = 0; i < 4; ++i){
int r2 = r + dr[i];
int c2 = c + dc[i];
if(good(r2, c2)&&b[r2][c2]==-1&&m[r2][c2]==-1&&
(a[r2][c2]=='G'||a[r2][c2]=='D')){
if(a[r2][c2]=='D')
return 1;
m[r2][c2] = m[r][c] + 1;
q2.emplace(r2, c2);
}
}
}
#ifdef _DEBUG
clog << "Line " << __LINE__ << ":\n";
for(int i = 0; i < n; ++i){
for(int j = 0; j < n; ++j)
clog << m[i][j] << sp;
clog << el;
}
clog << el;
#endif
while(!q.empty()){
auto[r, c] = q.front();
if(b[r][c]==t2)
break;
q.pop();
for(int i = 0; i < 4; ++i){
int r2 = r + dr[i];
int c2 = c + dc[i];
if(good(r2, c2)&&b[r2][c2]==-1&&(a[r2][c2]=='G'||a[r2][c2]=='M')){
b[r2][c2] = b[r][c] + 1;
q.emplace(r2, c2);
}
}
}
}
return 0;
}
signed main() {
ios::sync_with_stdio(0); cin.tie(0);
cout << fixed; clog << fixed;
#ifdef _DEBUG
freopen("input.txt", "r", stdin);
freopen("output.txt", "w", stdout);
freopen("debug.txt", "w", stderr);
#endif
cin >> n >> s;
for(int i = 0; i < n; ++i)
for(int j = 0; j < n; ++j){
cin >> a[i][j];
if(a[i][j]=='M')
st = {i, j};
else if(a[i][j]=='H')
h.eb(i, j);
}
#ifdef _DEBUG
clog << "Line " << __LINE__ << ":\n";
for(int i = 0; i < n; ++i){
for(int j = 0; j < n; ++j)
clog << a[i][j];
clog << el;
}
clog << el;
#endif
#ifdef _DEBUG
clog << "Line " << __LINE__ << ":\n";
for(auto[x, y]: h)
clog << x << sp << y << el;
#endif
dout(st.ff);
dout(st.ss);
int ans = -1;
for(int u = int(1e6); u > 0; u /= 2)
while(ans + u <= int(1e6) && ok(ans + u))
ans += u;
cout << ans;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
5 ms |
5324 KB |
Output is correct |
| 2 |
Correct |
5 ms |
5324 KB |
Output is correct |
| 3 |
Correct |
5 ms |
5324 KB |
Output is correct |
| 4 |
Correct |
5 ms |
5324 KB |
Output is correct |
| 5 |
Correct |
5 ms |
5376 KB |
Output is correct |
| 6 |
Correct |
7 ms |
5324 KB |
Output is correct |
| 7 |
Correct |
367 ms |
6376 KB |
Output is correct |
| 8 |
Correct |
5 ms |
5308 KB |
Output is correct |
| 9 |
Correct |
6 ms |
5324 KB |
Output is correct |
| 10 |
Correct |
6 ms |
5324 KB |
Output is correct |
| 11 |
Correct |
5 ms |
5324 KB |
Output is correct |
| 12 |
Correct |
8 ms |
5324 KB |
Output is correct |
| 13 |
Correct |
6 ms |
5324 KB |
Output is correct |
| 14 |
Correct |
7 ms |
5324 KB |
Output is correct |
| 15 |
Correct |
6 ms |
5308 KB |
Output is correct |
| 16 |
Correct |
5 ms |
5324 KB |
Output is correct |
| 17 |
Correct |
6 ms |
5324 KB |
Output is correct |
| 18 |
Correct |
5 ms |
5324 KB |
Output is correct |
| 19 |
Correct |
6 ms |
5324 KB |
Output is correct |
| 20 |
Correct |
6 ms |
5324 KB |
Output is correct |
| 21 |
Correct |
7 ms |
5324 KB |
Output is correct |
| 22 |
Correct |
6 ms |
5324 KB |
Output is correct |
| 23 |
Correct |
6 ms |
5324 KB |
Output is correct |
| 24 |
Correct |
6 ms |
5324 KB |
Output is correct |
| 25 |
Correct |
6 ms |
5324 KB |
Output is correct |
| 26 |
Correct |
8 ms |
5324 KB |
Output is correct |
| 27 |
Correct |
7 ms |
5448 KB |
Output is correct |
| 28 |
Correct |
6 ms |
5444 KB |
Output is correct |
| 29 |
Correct |
8 ms |
5324 KB |
Output is correct |
| 30 |
Correct |
7 ms |
5452 KB |
Output is correct |
| 31 |
Correct |
8 ms |
5452 KB |
Output is correct |
| 32 |
Correct |
7 ms |
5452 KB |
Output is correct |
| 33 |
Correct |
43 ms |
5708 KB |
Output is correct |
| 34 |
Correct |
41 ms |
5768 KB |
Output is correct |
| 35 |
Correct |
49 ms |
5700 KB |
Output is correct |
| 36 |
Correct |
49 ms |
5848 KB |
Output is correct |
| 37 |
Correct |
56 ms |
5836 KB |
Output is correct |
| 38 |
Correct |
61 ms |
5852 KB |
Output is correct |
| 39 |
Correct |
64 ms |
5836 KB |
Output is correct |
| 40 |
Correct |
61 ms |
5828 KB |
Output is correct |
| 41 |
Correct |
75 ms |
5924 KB |
Output is correct |
| 42 |
Correct |
80 ms |
6008 KB |
Output is correct |
| 43 |
Correct |
91 ms |
6016 KB |
Output is correct |
| 44 |
Correct |
95 ms |
5964 KB |
Output is correct |
| 45 |
Correct |
84 ms |
6056 KB |
Output is correct |
| 46 |
Correct |
89 ms |
5964 KB |
Output is correct |
| 47 |
Correct |
112 ms |
5964 KB |
Output is correct |
| 48 |
Correct |
113 ms |
6092 KB |
Output is correct |
| 49 |
Correct |
114 ms |
6100 KB |
Output is correct |
| 50 |
Correct |
134 ms |
6108 KB |
Output is correct |
| 51 |
Correct |
130 ms |
6136 KB |
Output is correct |
| 52 |
Correct |
123 ms |
6144 KB |
Output is correct |
| 53 |
Correct |
162 ms |
6164 KB |
Output is correct |
| 54 |
Correct |
155 ms |
6092 KB |
Output is correct |
| 55 |
Correct |
144 ms |
6184 KB |
Output is correct |
| 56 |
Correct |
179 ms |
6180 KB |
Output is correct |
| 57 |
Correct |
175 ms |
6220 KB |
Output is correct |
| 58 |
Correct |
164 ms |
6216 KB |
Output is correct |
| 59 |
Correct |
211 ms |
6220 KB |
Output is correct |
| 60 |
Correct |
174 ms |
6256 KB |
Output is correct |
| 61 |
Correct |
176 ms |
6348 KB |
Output is correct |
| 62 |
Correct |
234 ms |
6216 KB |
Output is correct |
| 63 |
Correct |
301 ms |
6264 KB |
Output is correct |
| 64 |
Correct |
339 ms |
6268 KB |
Output is correct |
| 65 |
Correct |
334 ms |
6264 KB |
Output is correct |
| 66 |
Correct |
442 ms |
6264 KB |
Output is correct |
| 67 |
Correct |
291 ms |
6220 KB |
Output is correct |
| 68 |
Correct |
323 ms |
6300 KB |
Output is correct |
| 69 |
Correct |
305 ms |
6296 KB |
Output is correct |
| 70 |
Correct |
308 ms |
6292 KB |
Output is correct |
| 71 |
Correct |
306 ms |
6340 KB |
Output is correct |
| 72 |
Correct |
440 ms |
6340 KB |
Output is correct |
| 73 |
Correct |
291 ms |
6596 KB |
Output is correct |
| 74 |
Correct |
374 ms |
6512 KB |
Output is correct |
| 75 |
Correct |
389 ms |
6576 KB |
Output is correct |
| 76 |
Correct |
364 ms |
6516 KB |
Output is correct |
| 77 |
Correct |
398 ms |
6668 KB |
Output is correct |
| 78 |
Correct |
304 ms |
6528 KB |
Output is correct |
| 79 |
Correct |
377 ms |
6480 KB |
Output is correct |
| 80 |
Correct |
395 ms |
6532 KB |
Output is correct |
| 81 |
Correct |
334 ms |
6536 KB |
Output is correct |
| 82 |
Correct |
326 ms |
6532 KB |
Output is correct |
| 83 |
Correct |
324 ms |
6496 KB |
Output is correct |
| 84 |
Correct |
358 ms |
6508 KB |
Output is correct |
| 85 |
Correct |
368 ms |
6408 KB |
Output is correct |
| 86 |
Correct |
371 ms |
6616 KB |
Output is correct |
| 87 |
Correct |
356 ms |
6476 KB |
Output is correct |
| 88 |
Correct |
312 ms |
6348 KB |
Output is correct |
| 89 |
Correct |
351 ms |
6432 KB |
Output is correct |
| 90 |
Correct |
367 ms |
6436 KB |
Output is correct |
| 91 |
Correct |
371 ms |
6428 KB |
Output is correct |
| 92 |
Correct |
356 ms |
6348 KB |
Output is correct |
