Submission #883248

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
883248	2023-12-04T21:59:46 Z	Servant_of_the_Lord	Mecho (IOI09_mecho)	C++17	79 / 100	620 ms	4064 KB

mecho

#include <bits/stdc++.h>
#define ll long long

using namespace std;

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

    ll x,y,z,a,b,c;
    cin>>x>>y;
    vector<string>v;
    vector<vector<ll>>w;
    for(ll i=0;i<x;i++)
    {
        string s;
        cin>>s;
        v.push_back(s);
        for(ll j=0;j<x;j++)
        {
            if(v[i][j]=='M')a=i,b=j;
            if(v[i][j]=='H')w.push_back({i,j});
        }
    }
    
    ll l=-1,h=x*x;
    while(l<h)
    {
        ll m=l+(h-l+1)/2;
        vector<string>u;
        for(string i:v)u.push_back(i);
        queue<vector<ll>>q,r;
        for(vector<ll>i:w)q.push(i);
        r.push({a,b});
        q.push({-1,-1});
        r.push({-1,-1});
        bool o=false;
        function<void(ll,ll)>a1=[&](ll a,ll b)
        {
            if(a<0||a>=x||b<0||b>=x||u[a][b]=='H'||u[a][b]=='D'||u[a][b]=='T')return;
            u[a][b]='H';
            q.push({a,b});
        };
        function<void(ll,ll)>a2=[&](ll a,ll b)
        {
            if(a<0||a>=x||b<0||b>=x||u[a][b]=='H'||u[a][b]=='M'||u[a][b]=='T')return;
            if(u[a][b]=='D')o=true;
            u[a][b]='M';
            r.push({a,b});
        };
        for(ll i=0;i<m-1;i++)
        {
            while(q.front()[0]!=-1)
            {
                a1(q.front()[0]-1,q.front()[1]);
                a1(q.front()[0]+1,q.front()[1]);
                a1(q.front()[0],q.front()[1]-1);
                a1(q.front()[0],q.front()[1]+1);
                q.pop();
            }
            q.pop();
            q.push({-1,-1});
        }
        while(r.front()[0]!=-1)
        {
            while(q.front()[0]!=-1)
            {
                a1(q.front()[0]-1,q.front()[1]);
                a1(q.front()[0]+1,q.front()[1]);
                a1(q.front()[0],q.front()[1]-1);
                a1(q.front()[0],q.front()[1]+1);
                q.pop();
            }
            q.pop();
            q.push({-1,-1});
            for(ll i=0;i<y;i++)
            {
                while(r.front()[0]!=-1)
                {
                    if(u[r.front()[0]][r.front()[1]]!='M')
                    {
                        r.pop();
                        continue;
                    }
                    a2(r.front()[0]-1,r.front()[1]);
                    a2(r.front()[0]+1,r.front()[1]);
                    a2(r.front()[0],r.front()[1]-1);
                    a2(r.front()[0],r.front()[1]+1);
                    r.pop();
                }
                r.pop();
                r.push({-1,-1});
            }
            
        }
        if(o)l=m;
        else h=m-1;
    }
    cout<<l<<'\n';
}

Compilation message

mecho.cpp:6:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    6 | main()
      | ^~~~
mecho.cpp: In function 'int main()':
mecho.cpp:11:12: warning: unused variable 'z' [-Wunused-variable]
   11 |     ll x,y,z,a,b,c;
      |            ^
mecho.cpp:11:18: warning: unused variable 'c' [-Wunused-variable]
   11 |     ll x,y,z,a,b,c;
      |                  ^
mecho.cpp:35:21: warning: 'b' may be used uninitialized in this function [-Wmaybe-uninitialized]
   35 |         r.push({a,b});
      |                     ^
mecho.cpp:35:21: warning: 'a' may be used uninitialized in this function [-Wmaybe-uninitialized]

Subtask #1

79.0 / 100.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	1 ms	348 KB	Output is correct
5	Incorrect	0 ms	348 KB	Output isn't correct
6	Correct	0 ms	348 KB	Output is correct
7	Correct	561 ms	2576 KB	Output is correct
8	Correct	0 ms	348 KB	Output is correct
9	Correct	1 ms	348 KB	Output is correct
10	Correct	0 ms	344 KB	Output is correct
11	Correct	0 ms	348 KB	Output is correct
12	Correct	2 ms	348 KB	Output is correct
13	Incorrect	1 ms	344 KB	Output isn't correct
14	Correct	2 ms	348 KB	Output is correct
15	Correct	0 ms	348 KB	Output is correct
16	Correct	0 ms	348 KB	Output is correct
17	Correct	1 ms	348 KB	Output is correct
18	Correct	1 ms	348 KB	Output is correct
19	Correct	1 ms	348 KB	Output is correct
20	Correct	1 ms	348 KB	Output is correct
21	Correct	1 ms	348 KB	Output is correct
22	Correct	1 ms	348 KB	Output is correct
23	Correct	2 ms	348 KB	Output is correct
24	Correct	1 ms	348 KB	Output is correct
25	Correct	1 ms	348 KB	Output is correct
26	Correct	2 ms	348 KB	Output is correct
27	Correct	2 ms	500 KB	Output is correct
28	Correct	2 ms	344 KB	Output is correct
29	Correct	2 ms	348 KB	Output is correct
30	Correct	2 ms	348 KB	Output is correct
31	Correct	2 ms	348 KB	Output is correct
32	Correct	2 ms	344 KB	Output is correct
33	Correct	53 ms	604 KB	Output is correct
34	Correct	46 ms	724 KB	Output is correct
35	Correct	60 ms	604 KB	Output is correct
36	Correct	70 ms	808 KB	Output is correct
37	Correct	65 ms	828 KB	Output is correct
38	Correct	76 ms	604 KB	Output is correct
39	Correct	87 ms	856 KB	Output is correct
40	Correct	79 ms	856 KB	Output is correct
41	Correct	120 ms	928 KB	Output is correct
42	Correct	130 ms	856 KB	Output is correct
43	Correct	98 ms	996 KB	Output is correct
44	Correct	129 ms	1024 KB	Output is correct
45	Correct	145 ms	1112 KB	Output is correct
46	Correct	118 ms	1112 KB	Output is correct
47	Correct	151 ms	1156 KB	Output is correct
48	Correct	215 ms	1112 KB	Output is correct
49	Correct	154 ms	1244 KB	Output is correct
50	Correct	179 ms	1112 KB	Output is correct
51	Correct	221 ms	1384 KB	Output is correct
52	Correct	176 ms	1372 KB	Output is correct
53	Correct	241 ms	1420 KB	Output is correct
54	Correct	238 ms	1644 KB	Output is correct
55	Correct	203 ms	1520 KB	Output is correct
56	Correct	259 ms	1368 KB	Output is correct
57	Correct	277 ms	1876 KB	Output is correct
58	Correct	282 ms	1660 KB	Output is correct
59	Correct	307 ms	1716 KB	Output is correct
60	Correct	346 ms	1800 KB	Output is correct
61	Correct	263 ms	1800 KB	Output is correct
62	Correct	353 ms	1872 KB	Output is correct
63	Incorrect	416 ms	1836 KB	Output isn't correct
64	Correct	439 ms	2092 KB	Output is correct
65	Correct	393 ms	1856 KB	Output is correct
66	Correct	451 ms	1848 KB	Output is correct
67	Correct	419 ms	1872 KB	Output is correct
68	Incorrect	448 ms	2040 KB	Output isn't correct
69	Correct	404 ms	1884 KB	Output is correct
70	Correct	414 ms	2040 KB	Output is correct
71	Correct	474 ms	2044 KB	Output is correct
72	Correct	500 ms	2032 KB	Output is correct
73	Correct	444 ms	3820 KB	Output is correct
74	Correct	552 ms	3924 KB	Output is correct
75	Correct	620 ms	3912 KB	Output is correct
76	Correct	571 ms	3828 KB	Output is correct
77	Correct	588 ms	4064 KB	Output is correct
78	Correct	543 ms	3604 KB	Output is correct
79	Correct	535 ms	3672 KB	Output is correct
80	Correct	576 ms	3608 KB	Output is correct
81	Correct	554 ms	3616 KB	Output is correct
82	Correct	547 ms	3788 KB	Output is correct
83	Incorrect	542 ms	3276 KB	Output isn't correct
84	Correct	540 ms	3416 KB	Output is correct
85	Correct	573 ms	3408 KB	Output is correct
86	Correct	540 ms	3288 KB	Output is correct
87	Correct	536 ms	3412 KB	Output is correct
88	Incorrect	533 ms	3156 KB	Output isn't correct
89	Correct	522 ms	2948 KB	Output is correct
90	Correct	525 ms	3160 KB	Output is correct
91	Correct	559 ms	3160 KB	Output is correct
92	Correct	563 ms	3116 KB	Output is correct