oj.uz

Submission #799528

# Submission time Handle Problem Language Result Execution time Memory
799528 2023-07-31T15:38:53 Z Baytoro Mecho (IOI09_mecho) C++17
30 / 100
 1000 ms 6356 KB 
#include <bits/stdc++.h>
using namespace std;
#define ios ios::sync_with_stdio(false); cin.tie(NULL);cout.tie(NULL);
#define pb push_back
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define fr first
#define sc second
#define endl "\n"
#define ll long long
//#define int long long
void fopn(string name){
	freopen((name+".in").c_str(),"r",stdin);
	freopen((name+".out").c_str(),"w",stdout);
}
const ll INF=1e18,mod=1e9,N=1e7+5;
int n,s;
char a[805][805];
pair<int,int> cur,last;
int dist[805][805][2];
vector<int> dx={1,-1,0, 0},
			dy={0, 0,1,-1};
bool okh(int x, int y){
	return (x>0 && x<=n && y>0 && y<=n && (a[x][y]=='M' || a[x][y]=='G' || a[x][y]=='H'));
}
bool okm(int x, int y){
	return (x>0 && x<=n && y>0 && y<=n && (a[x][y]=='M' || a[x][y]=='G' || a[x][y]=='D'));
}
queue<pair<int,int>> dq;
bool check(int D){
	if(dist[cur.fr][cur.sc][0]<=D) return 0;
	while(!dq.empty()) dq.pop();
	dq.push({cur.fr,cur.sc});
	for(int i=1;i<=n;i++){
		for(int j=1;j<=n;j++)
			dist[i][j][1]=0;
	}
	dist[cur.fr][cur.sc][1]=1;
	while(!dq.empty()){
		pair<int,int> a=dq.front();
		dq.pop();
		for(int i=0;i<4;i++){
			int x=a.fr+dx[i],y=a.sc+dy[i];
			int d=dist[a.fr][a.sc][1]+1;
			if(okm(x,y) && !dist[x][y][1]){
				if((d-1)/s+1+D<=dist[x][y][0]){
					dq.push({x,y});
					dist[x][y][1]=d;
				}
				if(x==last.fr && y==last.sc && (d-1)/s+D-((d-1)%s==0)<=dist[x][y][0]) return 1;
			}
		}
	}
	return dist[last.fr][last.sc][1];
}
void solve(){
	queue<pair<int,int>> dq;
	cin>>n>>s;
	for(int i=1;i<=n;i++){
		for(int j=1;j<=n;j++){
			cin>>a[i][j];
			if(a[i][j]=='H'){
				dq.push({i,j});
				dist[i][j][0]=1;
			}
			else if(a[i][j]=='M')
				cur={i,j};
			else if(a[i][j]=='D')
				last={i,j};
		}
	}
	while(!dq.empty()){
		pair<int,int> a=dq.front();
		dq.pop();
		for(int i=0;i<4;i++){
			int x=a.fr+dx[i],y=a.sc+dy[i];
			if(okh(x,y) && !dist[x][y][0]){
				dist[x][y][0]=dist[a.fr][a.sc][0]+1;
				dq.push({x,y});
			}
		}
	}
	for(int i=1;i<=n;i++){
		for(int j=1;j<=n;j++){
			dist[i][j][0]-=(dist[i][j][0]>0);
		}
	}
	dist[last.fr][last.sc][0]=2e9;
	int l=-1,r=1e9;
	while(l<r){
		int md=(l+r)/2;
		if(check(md)) l=md;
		else r=md-1;
	}
	cout<<l<<endl;
}
main(){
	ios;
	int T=1;
	//cin>>T;
	for(int i=1;i<=T;i++){
		//cout<<"Case #"<<i<<": ";
		solve();
	}
}

Compilation message

mecho.cpp:97:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   97 | main(){
      | ^~~~
mecho.cpp: In function 'void fopn(std::string)':
mecho.cpp:13:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |  freopen((name+".in").c_str(),"r",stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
mecho.cpp:14:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |  freopen((name+".out").c_str(),"w",stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
30.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Execution timed out 1099 ms 6036 KB Time limit exceeded
8 Correct 1 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Execution timed out 1083 ms 340 KB Time limit exceeded
11 Execution timed out 1086 ms 340 KB Time limit exceeded
12 Correct 1 ms 596 KB Output is correct
13 Correct 1 ms 596 KB Output is correct
14 Correct 1 ms 596 KB Output is correct
15 Execution timed out 1088 ms 340 KB Time limit exceeded
16 Execution timed out 1075 ms 340 KB Time limit exceeded
17 Execution timed out 1079 ms 340 KB Time limit exceeded
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 468 KB Output is correct
20 Execution timed out 1091 ms 468 KB Time limit exceeded
21 Execution timed out 1079 ms 468 KB Time limit exceeded
22 Correct 1 ms 468 KB Output is correct
23 Correct 1 ms 468 KB Output is correct
24 Execution timed out 1081 ms 468 KB Time limit exceeded
25 Execution timed out 1071 ms 596 KB Time limit exceeded
26 Correct 1 ms 596 KB Output is correct
27 Execution timed out 1081 ms 596 KB Time limit exceeded
28 Execution timed out 1082 ms 536 KB Time limit exceeded
29 Execution timed out 1084 ms 596 KB Time limit exceeded
30 Execution timed out 1083 ms 596 KB Time limit exceeded
31 Execution timed out 1086 ms 724 KB Time limit exceeded
32 Correct 1 ms 724 KB Output is correct
33 Execution timed out 1081 ms 2720 KB Time limit exceeded
34 Correct 4 ms 2772 KB Output is correct
35 Execution timed out 1089 ms 2772 KB Time limit exceeded
36 Execution timed out 1063 ms 3136 KB Time limit exceeded
37 Execution timed out 1071 ms 3156 KB Time limit exceeded
38 Execution timed out 1082 ms 3156 KB Time limit exceeded
39 Correct 9 ms 3428 KB Output is correct
40 Execution timed out 1078 ms 3412 KB Time limit exceeded
41 Execution timed out 1064 ms 3412 KB Time limit exceeded
42 Execution timed out 1062 ms 3796 KB Time limit exceeded
43 Execution timed out 1061 ms 3796 KB Time limit exceeded
44 Execution timed out 1085 ms 3812 KB Time limit exceeded
45 Execution timed out 1076 ms 4180 KB Time limit exceeded
46 Execution timed out 1075 ms 4180 KB Time limit exceeded
47 Execution timed out 1072 ms 4136 KB Time limit exceeded
48 Execution timed out 1085 ms 4492 KB Time limit exceeded
49 Execution timed out 1083 ms 4564 KB Time limit exceeded
50 Execution timed out 1063 ms 4564 KB Time limit exceeded
51 Execution timed out 1077 ms 4820 KB Time limit exceeded
52 Correct 20 ms 4820 KB Output is correct
53 Execution timed out 1081 ms 4872 KB Time limit exceeded
54 Execution timed out 1075 ms 5236 KB Time limit exceeded
55 Correct 16 ms 5236 KB Output is correct
56 Execution timed out 1061 ms 5248 KB Time limit exceeded
57 Correct 24 ms 5632 KB Output is correct
58 Execution timed out 1079 ms 5548 KB Time limit exceeded
59 Execution timed out 1090 ms 5548 KB Time limit exceeded
60 Execution timed out 1074 ms 5884 KB Time limit exceeded
61 Execution timed out 1071 ms 5880 KB Time limit exceeded
62 Execution timed out 1072 ms 5924 KB Time limit exceeded
63 Correct 117 ms 5988 KB Output is correct
64 Correct 211 ms 5992 KB Output is correct
65 Execution timed out 1063 ms 5984 KB Time limit exceeded
66 Correct 119 ms 5992 KB Output is correct
67 Correct 106 ms 5988 KB Output is correct
68 Correct 58 ms 5972 KB Output is correct
69 Execution timed out 1069 ms 5972 KB Time limit exceeded
70 Execution timed out 1075 ms 5928 KB Time limit exceeded
71 Execution timed out 1073 ms 5968 KB Time limit exceeded
72 Correct 30 ms 5972 KB Output is correct
73 Correct 34 ms 6268 KB Output is correct
74 Execution timed out 1083 ms 6284 KB Time limit exceeded
75 Correct 92 ms 6272 KB Output is correct
76 Execution timed out 1091 ms 6264 KB Time limit exceeded
77 Execution timed out 1080 ms 6356 KB Time limit exceeded
78 Correct 75 ms 6244 KB Output is correct
79 Correct 54 ms 6244 KB Output is correct
80 Execution timed out 1090 ms 6176 KB Time limit exceeded
81 Correct 77 ms 6228 KB Output is correct
82 Execution timed out 1088 ms 6184 KB Time limit exceeded
83 Correct 86 ms 6212 KB Output is correct
84 Execution timed out 1076 ms 6144 KB Time limit exceeded
85 Execution timed out 1062 ms 6208 KB Time limit exceeded
86 Execution timed out 1073 ms 6180 KB Time limit exceeded
87 Correct 83 ms 6208 KB Output is correct
88 Correct 97 ms 6144 KB Output is correct
89 Execution timed out 1092 ms 6140 KB Time limit exceeded
90 Execution timed out 1076 ms 6032 KB Time limit exceeded
91 Execution timed out 1066 ms 6096 KB Time limit exceeded
92 Execution timed out 1081 ms 6100 KB Time limit exceeded