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Submission #754291

# Submission time Handle Problem Language Result Execution time Memory
754291 2023-06-07T12:19:39 Z TimDee Mecho (IOI09_mecho) C++17
100 / 100
 415 ms 17292 KB 
#include <bits/stdc++.h>
using namespace std;

#define int long long
#define forn(i,n) for(int i=0;i<n;++i)
#define pi pair<int,int>
#define f first
#define s second
#define pb push_back
#define all(x) x.begin(),x.end()
#define vii(a,n) vector<int>a(n);forn(i,n)cin>>a[i];

const int inf=1e18;

const int N=800;
string a[N];
int d[N][N];
int p[N][N];
int vis[N][N];

void clear(int n) {
	forn(i,n) forn(j,n) d[i][j]=0;
}
void reset(int n) {
	forn(i,n) forn(j,n) vis[i][j]=0;
}

struct z {
	int f,s,d,d1,d2;
};

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

void solve() {

	int n,s; cin>>n>>s;
	forn(i,n) cin>>a[i];

	forn(i,n) forn(j,n) p[i][j]=inf;
	queue<z> q;
	forn(i,n) forn(j,n) if (a[i][j]=='H') {
		q.push({i,j,0});
	}

	while (q.size()) {
		auto it=q.front(); q.pop();
		int x=it.f, y=it.s, d=it.d;
		if (x<0 || y<0) continue;
		if (x>=n || y>=n) continue;
		if (vis[x][y]) continue;
		if (a[x][y]=='T' || a[x][y]=='D') continue;
		vis[x][y]=1;
		p[x][y]=d;
		q.push({x-1,y,d+1});
		q.push({x+1,y,d+1});
		q.push({x,y-1,d+1});
		q.push({x,y+1,d+1});
	}

	int l=-1, r=1e9;
	pi D;
	forn(i,n) forn(j,n) if (a[i][j]=='D') D={i,j};
	while (l<r) {
		int mid=(l+r+1)>>1;
		reset(n);
		forn(i,n) forn(j,n) if (a[i][j]=='M') {
			q.push({i,j,0,0,0});
		}

		while (q.size()) {
			auto it=q.front(); q.pop();
			int x=it.f, y=it.s, d=it.d, d1=it.d1, d2=it.d2;
			//cout<<mid<<": "<<x<<' '<<y<<' '<<d<<' '<<vis[x][y]<<' '<<p[x][y]<<' '<<a[x][y]<<'\n';
			if (x<0 || y<0) continue;
			if (x>=n || y>=n) continue;
			if (vis[x][y]) continue;
			if (a[x][y]=='T') continue;
			if (p[x][y]<mid+(d+s-1)/s) continue;
			if (p[x][y]==mid+(d+s-1)/s) {
				if (d%s) {

				} else {
					continue;
				}
			}
			vis[x][y]=1;
			q.push({x-1,y,d+1});
			q.push({x+1,y,d+1});
			q.push({x,y-1,d+1});
			q.push({x,y+1,d+1});
		}
		if (vis[D.f][D.s]) l=mid;
		else r=mid-1;
	}
	cout<<r<<'\n';

}

int32_t main() {
	ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	solve();
}

Compilation message

mecho.cpp: In function 'void solve()':
mecho.cpp:72:32: warning: unused variable 'd1' [-Wunused-variable]
   72 |    int x=it.f, y=it.s, d=it.d, d1=it.d1, d2=it.d2;
      |                                ^~
mecho.cpp:72:42: warning: unused variable 'd2' [-Wunused-variable]
   72 |    int x=it.f, y=it.s, d=it.d, d1=it.d1, d2=it.d2;
      |                                          ^~

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 360 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 360 KB Output is correct
5 Correct 1 ms 360 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 297 ms 13924 KB Output is correct
8 Correct 1 ms 484 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 1 ms 468 KB Output is correct
11 Correct 1 ms 356 KB Output is correct
12 Correct 1 ms 852 KB Output is correct
13 Correct 1 ms 748 KB Output is correct
14 Correct 2 ms 980 KB Output is correct
15 Correct 1 ms 468 KB Output is correct
16 Correct 1 ms 484 KB Output is correct
17 Correct 1 ms 468 KB Output is correct
18 Correct 1 ms 488 KB Output is correct
19 Correct 1 ms 596 KB Output is correct
20 Correct 1 ms 612 KB Output is correct
21 Correct 1 ms 596 KB Output is correct
22 Correct 1 ms 596 KB Output is correct
23 Correct 1 ms 724 KB Output is correct
24 Correct 2 ms 740 KB Output is correct
25 Correct 1 ms 852 KB Output is correct
26 Correct 2 ms 872 KB Output is correct
27 Correct 1 ms 852 KB Output is correct
28 Correct 1 ms 872 KB Output is correct
29 Correct 1 ms 980 KB Output is correct
30 Correct 1 ms 980 KB Output is correct
31 Correct 2 ms 980 KB Output is correct
32 Correct 2 ms 1008 KB Output is correct
33 Correct 15 ms 4868 KB Output is correct
34 Correct 17 ms 4948 KB Output is correct
35 Correct 65 ms 5048 KB Output is correct
36 Correct 14 ms 5680 KB Output is correct
37 Correct 21 ms 5588 KB Output is correct
38 Correct 82 ms 5768 KB Output is correct
39 Correct 19 ms 6308 KB Output is correct
40 Correct 22 ms 6368 KB Output is correct
41 Correct 92 ms 6488 KB Output is correct
42 Correct 21 ms 7124 KB Output is correct
43 Correct 18 ms 7124 KB Output is correct
44 Correct 121 ms 7228 KB Output is correct
45 Correct 24 ms 7804 KB Output is correct
46 Correct 26 ms 7852 KB Output is correct
47 Correct 164 ms 7968 KB Output is correct
48 Correct 33 ms 8552 KB Output is correct
49 Correct 30 ms 8524 KB Output is correct
50 Correct 201 ms 8724 KB Output is correct
51 Correct 36 ms 9352 KB Output is correct
52 Correct 40 ms 9300 KB Output is correct
53 Correct 249 ms 9544 KB Output is correct
54 Correct 64 ms 10108 KB Output is correct
55 Correct 84 ms 10120 KB Output is correct
56 Correct 260 ms 10260 KB Output is correct
57 Correct 46 ms 10784 KB Output is correct
58 Correct 43 ms 10788 KB Output is correct
59 Correct 317 ms 11044 KB Output is correct
60 Correct 52 ms 11660 KB Output is correct
61 Correct 54 ms 11544 KB Output is correct
62 Correct 415 ms 11836 KB Output is correct
63 Correct 214 ms 11612 KB Output is correct
64 Correct 379 ms 11732 KB Output is correct
65 Correct 385 ms 11736 KB Output is correct
66 Correct 253 ms 11728 KB Output is correct
67 Correct 231 ms 11716 KB Output is correct
68 Correct 114 ms 12260 KB Output is correct
69 Correct 109 ms 12252 KB Output is correct
70 Correct 78 ms 12284 KB Output is correct
71 Correct 113 ms 12264 KB Output is correct
72 Correct 104 ms 12272 KB Output is correct
73 Correct 120 ms 17284 KB Output is correct
74 Correct 194 ms 17292 KB Output is correct
75 Correct 225 ms 17284 KB Output is correct
76 Correct 231 ms 17288 KB Output is correct
77 Correct 195 ms 17284 KB Output is correct
78 Correct 208 ms 16592 KB Output is correct
79 Correct 182 ms 16536 KB Output is correct
80 Correct 177 ms 16648 KB Output is correct
81 Correct 210 ms 16640 KB Output is correct
82 Correct 177 ms 16564 KB Output is correct
83 Correct 219 ms 15924 KB Output is correct
84 Correct 200 ms 15784 KB Output is correct
85 Correct 226 ms 15764 KB Output is correct
86 Correct 208 ms 15988 KB Output is correct
87 Correct 200 ms 15732 KB Output is correct
88 Correct 237 ms 14924 KB Output is correct
89 Correct 248 ms 14936 KB Output is correct
90 Correct 240 ms 14924 KB Output is correct
91 Correct 219 ms 14920 KB Output is correct
92 Correct 234 ms 14948 KB Output is correct