Submission #883249

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
883249	2023-12-04T22:05:21 Z	Servant_of_the_Lord	Mecho (IOI09_mecho)	C++17	84 / 100	595 ms	3980 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=0,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

84.0 / 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	0 ms	348 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	0 ms	348 KB	Output is correct
7	Correct	507 ms	2576 KB	Output is correct
8	Incorrect	0 ms	348 KB	Output isn't correct
9	Correct	1 ms	348 KB	Output is correct
10	Correct	0 ms	348 KB	Output is correct
11	Correct	0 ms	348 KB	Output is correct
12	Correct	1 ms	348 KB	Output is correct
13	Correct	1 ms	348 KB	Output is correct
14	Incorrect	2 ms	508 KB	Output isn't correct
15	Correct	0 ms	348 KB	Output is correct
16	Correct	0 ms	348 KB	Output is correct
17	Correct	0 ms	348 KB	Output is correct
18	Correct	0 ms	348 KB	Output is correct
19	Correct	1 ms	348 KB	Output is correct
20	Correct	1 ms	344 KB	Output is correct
21	Correct	1 ms	344 KB	Output is correct
22	Correct	1 ms	344 KB	Output is correct
23	Correct	1 ms	348 KB	Output is correct
24	Correct	1 ms	348 KB	Output is correct
25	Correct	2 ms	348 KB	Output is correct
26	Correct	1 ms	348 KB	Output is correct
27	Correct	3 ms	344 KB	Output is correct
28	Correct	2 ms	348 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	488 KB	Output is correct
32	Correct	2 ms	348 KB	Output is correct
33	Correct	53 ms	604 KB	Output is correct
34	Correct	44 ms	604 KB	Output is correct
35	Correct	58 ms	604 KB	Output is correct
36	Correct	70 ms	800 KB	Output is correct
37	Correct	66 ms	812 KB	Output is correct
38	Correct	76 ms	604 KB	Output is correct
39	Correct	88 ms	856 KB	Output is correct
40	Correct	79 ms	856 KB	Output is correct
41	Correct	102 ms	856 KB	Output is correct
42	Correct	114 ms	860 KB	Output is correct
43	Correct	98 ms	856 KB	Output is correct
44	Correct	133 ms	856 KB	Output is correct
45	Correct	145 ms	1116 KB	Output is correct
46	Correct	124 ms	1112 KB	Output is correct
47	Correct	186 ms	1116 KB	Output is correct
48	Correct	164 ms	1240 KB	Output is correct
49	Correct	145 ms	1256 KB	Output is correct
50	Correct	192 ms	1116 KB	Output is correct
51	Correct	203 ms	1372 KB	Output is correct
52	Correct	179 ms	1620 KB	Output is correct
53	Correct	222 ms	1368 KB	Output is correct
54	Correct	237 ms	1484 KB	Output is correct
55	Correct	210 ms	1700 KB	Output is correct
56	Correct	258 ms	1372 KB	Output is correct
57	Correct	280 ms	1648 KB	Output is correct
58	Correct	233 ms	1648 KB	Output is correct
59	Correct	296 ms	1624 KB	Output is correct
60	Correct	311 ms	1816 KB	Output is correct
61	Correct	277 ms	1820 KB	Output is correct
62	Correct	344 ms	1864 KB	Output is correct
63	Correct	389 ms	1848 KB	Output is correct
64	Correct	426 ms	1856 KB	Output is correct
65	Correct	379 ms	1628 KB	Output is correct
66	Correct	434 ms	1848 KB	Output is correct
67	Incorrect	411 ms	1628 KB	Output isn't correct
68	Correct	453 ms	2132 KB	Output is correct
69	Correct	394 ms	2024 KB	Output is correct
70	Correct	462 ms	2036 KB	Output is correct
71	Correct	472 ms	2284 KB	Output is correct
72	Correct	500 ms	1884 KB	Output is correct
73	Correct	429 ms	3980 KB	Output is correct
74	Correct	535 ms	3824 KB	Output is correct
75	Correct	585 ms	3816 KB	Output is correct
76	Correct	585 ms	3964 KB	Output is correct
77	Correct	575 ms	3832 KB	Output is correct
78	Incorrect	533 ms	3420 KB	Output isn't correct
79	Correct	529 ms	3920 KB	Output is correct
80	Correct	558 ms	3600 KB	Output is correct
81	Correct	595 ms	3612 KB	Output is correct
82	Correct	544 ms	3644 KB	Output is correct
83	Correct	555 ms	3280 KB	Output is correct
84	Correct	570 ms	3408 KB	Output is correct
85	Correct	579 ms	3288 KB	Output is correct
86	Correct	574 ms	3288 KB	Output is correct
87	Correct	563 ms	3432 KB	Output is correct
88	Correct	530 ms	2908 KB	Output is correct
89	Correct	565 ms	3052 KB	Output is correct
90	Correct	554 ms	2944 KB	Output is correct
91	Correct	521 ms	2904 KB	Output is correct
92	Correct	524 ms	3064 KB	Output is correct