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Submission #476431

# Submission time Handle Problem Language Result Execution time Memory
476431 2021-09-26T18:25:45 Z Morley Mecho (IOI09_mecho) C++14
100 / 100
 213 ms 4352 KB 
#include <bits/stdc++.h>
using namespace std;

using ll = long long;
using vi = vector<int>;
using vl = vector<long long>;
using vb = vector<bool>;
using vvi = vector<vector<int>>;
using vvpi = vector<vector<pair<int,int>>>;
using vvb = vector<vector<bool>>;
using str = string;
using pi= pair<int,int>;
using pll = pair<ll,ll>;
using vpi = vector<pi>;
using ti = tuple<int,int,int>;
using vti = vector<ti>;

#define pb push_back
#define rs resize
#define mp make_pair
#define FOR(x,y,z) for(int x=y; x<z; x++)
#define F0R(x,z) for(int x=0; x<z; x++)
#define all(a) a.begin() , a.end()

ll mx = 1000000000000000000;
int inf = 2000000000;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);

	int n,s; cin >> n >> s;
	vector<str> F(n);
	for(int i=0;i<n;i++) cin >> F[i];
	vvi hd(n,vi(n,inf));
	queue<ti> Q;
	for(int i=0;i<n;i++) for(int j=0;j<n;j++) if(F[i][j]=='H') Q.push({i,j,0});
	while(!Q.empty()) {
		ti cur=Q.front(); Q.pop();
		int i=get<0>(cur),j=get<1>(cur),d=get<2>(cur);
		//cout << i << j << d << "\n";
		if(d>=hd[i][j]) continue;
		hd[i][j]=d;
		if(i>0 && hd[i-1][j]==inf && (F[i-1][j]=='G' || F[i-1][j]=='M')) Q.push({i-1,j,d+1});
		if(i<n-1 && hd[i+1][j]==inf && (F[i+1][j]=='G' || F[i+1][j]=='M')) Q.push({i+1,j,d+1});
		if(j>0 && hd[i][j-1]==inf && (F[i][j-1]=='G' || F[i][j-1]=='M')) Q.push({i,j-1,d+1});
		if(j<n-1 && hd[i][j+1]==inf && (F[i][j+1]=='G' || F[i][j+1]=='M')) Q.push({i,j+1,d+1});
	}
	//for(int i=0;i<n;i++) {for(int j=0;j<n;j++) if(hd[i][j]<inf) cout << hd[i][j]; else cout << "T"; cout << "\n";}
	int lob=-1,upb=n*n;
	while(lob<upb) {
		int tst=(lob+upb+1)/2;
		queue<ti> Qp;
		for(int i=0;i<n;i++) for(int j=0;j<n;j++) if(F[i][j]=='M') Qp.push({i,j,0});
		bool good=false; vb vis(n*n,false);
		while(!Qp.empty()) {
			ti cur=Qp.front(); Qp.pop();
			int i=get<0>(cur),j=get<1>(cur),d=get<2>(cur);
			//cout << i << j << d << " ";
			vis[i*n+j]=true;
			if(F[i][j]=='D') {good=true; break;}
			if(tst+d/s>=hd[i][j]) continue;
			if(i>0 && !vis[(i-1)*n+j] && (F[i-1][j]=='G' || F[i-1][j]=='D')) {Qp.push({i-1,j,d+1}); vis[n*(i-1)+j]=true;}
			if(i<n-1 && !vis[n*(i+1)+j] && (F[i+1][j]=='G' || F[i+1][j]=='D')) {Qp.push({i+1,j,d+1}); vis[n*(i+1)+j]=true;}
			if(j>0 && !vis[n*i+j-1] && (F[i][j-1]=='G' || F[i][j-1]=='D')) {Qp.push({i,j-1,d+1}); vis[n*i+j-1]=true;}
			if(j<n-1 && !vis[n*i+j+1] && (F[i][j+1]=='G' || F[i][j+1]=='D')) {Qp.push({i,j+1,d+1}); vis[n*i+j+1]=true;}
		}
		if(!good) upb=tst-1;
		else lob=tst;
	}
	cout << upb;

	return 0;
}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 2 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 95 ms 3856 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 0 ms 332 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 0 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 0 ms 204 KB Output is correct
18 Correct 0 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 0 ms 204 KB Output is correct
21 Correct 0 ms 204 KB Output is correct
22 Correct 0 ms 204 KB Output is correct
23 Correct 1 ms 204 KB Output is correct
24 Correct 0 ms 332 KB Output is correct
25 Correct 0 ms 332 KB Output is correct
26 Correct 1 ms 332 KB Output is correct
27 Correct 1 ms 332 KB Output is correct
28 Correct 1 ms 332 KB Output is correct
29 Correct 1 ms 332 KB Output is correct
30 Correct 1 ms 332 KB Output is correct
31 Correct 0 ms 332 KB Output is correct
32 Correct 1 ms 332 KB Output is correct
33 Correct 4 ms 956 KB Output is correct
34 Correct 4 ms 844 KB Output is correct
35 Correct 23 ms 956 KB Output is correct
36 Correct 5 ms 1100 KB Output is correct
37 Correct 5 ms 1152 KB Output is correct
38 Correct 26 ms 1100 KB Output is correct
39 Correct 6 ms 1356 KB Output is correct
40 Correct 5 ms 1356 KB Output is correct
41 Correct 35 ms 1356 KB Output is correct
42 Correct 7 ms 1612 KB Output is correct
43 Correct 8 ms 1584 KB Output is correct
44 Correct 47 ms 1596 KB Output is correct
45 Correct 9 ms 1868 KB Output is correct
46 Correct 13 ms 1876 KB Output is correct
47 Correct 49 ms 1868 KB Output is correct
48 Correct 11 ms 2192 KB Output is correct
49 Correct 14 ms 2220 KB Output is correct
50 Correct 61 ms 2124 KB Output is correct
51 Correct 13 ms 2508 KB Output is correct
52 Correct 12 ms 2508 KB Output is correct
53 Correct 82 ms 2496 KB Output is correct
54 Correct 15 ms 2856 KB Output is correct
55 Correct 16 ms 2764 KB Output is correct
56 Correct 104 ms 2844 KB Output is correct
57 Correct 17 ms 3232 KB Output is correct
58 Correct 21 ms 3276 KB Output is correct
59 Correct 134 ms 3216 KB Output is correct
60 Correct 19 ms 3532 KB Output is correct
61 Correct 18 ms 3532 KB Output is correct
62 Correct 129 ms 3556 KB Output is correct
63 Correct 113 ms 3540 KB Output is correct
64 Correct 213 ms 3652 KB Output is correct
65 Correct 156 ms 3604 KB Output is correct
66 Correct 127 ms 3492 KB Output is correct
67 Correct 126 ms 3612 KB Output is correct
68 Correct 50 ms 3572 KB Output is correct
69 Correct 54 ms 3576 KB Output is correct
70 Correct 38 ms 3588 KB Output is correct
71 Correct 44 ms 3644 KB Output is correct
72 Correct 34 ms 3644 KB Output is correct
73 Correct 43 ms 4300 KB Output is correct
74 Correct 67 ms 4300 KB Output is correct
75 Correct 86 ms 4352 KB Output is correct
76 Correct 78 ms 4352 KB Output is correct
77 Correct 77 ms 4296 KB Output is correct
78 Correct 84 ms 4172 KB Output is correct
79 Correct 64 ms 4172 KB Output is correct
80 Correct 68 ms 4172 KB Output is correct
81 Correct 78 ms 4268 KB Output is correct
82 Correct 81 ms 4292 KB Output is correct
83 Correct 89 ms 4140 KB Output is correct
84 Correct 76 ms 4136 KB Output is correct
85 Correct 89 ms 4044 KB Output is correct
86 Correct 80 ms 4116 KB Output is correct
87 Correct 84 ms 4156 KB Output is correct
88 Correct 106 ms 3916 KB Output is correct
89 Correct 115 ms 4000 KB Output is correct
90 Correct 93 ms 3940 KB Output is correct
91 Correct 89 ms 4004 KB Output is correct
92 Correct 95 ms 3916 KB Output is correct