Submission #1081271

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
1081271	2024-08-29T20:45:58 Z	Dennis_Jason	Mecho (IOI09_mecho)	C++14	100 / 100	137 ms	8896 KB

mecho

#include <bits/stdc++.h>
#define NMAX 100001
#define pb push_back
#define eb emplace_back
#define MOD 100003
#define nl '\n'
#define INF  2147483647
#define LLONG_MAX 9223372036854775807
#define pii pair<int,int>
#define tpl tuple<int,int,int>
//#pragma GCC optimize("O3")
using namespace std;
ifstream fin("aib.in");
ofstream fout("aib.out");
/*
 *
 *
    ================DEMONSTRATION===================


    =====================END========================
 */
int n,s;
int mat[805][805];
int dist[805][805];
int bee[805][805];
int di[]={1,-1,0,0};
int dj[]={0,0,1,-1};
int i_s,j_s,i_e,j_e;
queue<pii>bq;
queue<tpl>q;
bool inmat(int i,int j)
{
    return i>=1 && i<=n && j>=1 && j<=n;
}
void bear_bfs()
{
    while(!q.empty())
    {
        auto [x,y,dis]=q.front();
        q.pop();
//        cout<<x<<" "<<y<<" "<<dist[x][y]<<nl;
        if(x==i_e  && y==j_e)
        {
            return;
        }
            for(int d=0;d<4;++d)
            {
                int inou = x + di[d];
                int jnou = y + dj[d];
                int ceva=0;
                if(dis==1)
                    ceva=1;
                if (inmat(inou, jnou)
                    && (mat[inou][jnou] == 4 || mat[inou][jnou] == 3)
                    && dist[x][y] + ceva < bee[inou][jnou]
                    && dist[x][y] + ceva < dist[inou][jnou])
                {
                    dist[inou][jnou] = dist[x][y] + ceva;
                    if(ceva)
                        q.push({inou, jnou,s});
                    else
                        q.push({inou,jnou,dis-1});
                }
            }

    }
}

void bee_bfs()
{
    while(!bq.empty())
    {
        auto [x,y]=bq.front();
        bq.pop();
        for(int d=0;d<4;++d)
        {
            int inou=x+di[d];
            int jnou=y+dj[d];
            if(inmat(inou,jnou) && bee[inou][jnou]>bee[x][y]+1 && (mat[inou][jnou]==4 || mat[inou][jnou]==2))
            {
                bee[inou][jnou]=bee[x][y]+1;
                bq.push({inou,jnou});
            }
        }
    }
}
bool check(int sec)
{
    if(bee[i_s][j_s]<=sec)
        return false;
    for(int i=1;i<=n;++i)
    {
        for(int j=1;j<=n;++j)
        {
            dist[i][j]=INF;
        }
    }
    while(!q.empty())
        q.pop();
    dist[i_s][j_s]=sec;
    q.push({i_s,j_s,s});
    bear_bfs();

    return dist[i_e][j_e]!=INF;
}
signed main() {

    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    cin>>n>>s;
    for(int i=1;i<=n;++i)
    {
        for(int j=1;j<=n;++j)
        {
            dist[i][j]=bee[i][j]=INF;
            char x;
            cin>>x;
            if(x=='T')
                mat[i][j]=1;
            else if(x=='M')
            {
                i_s=i;
                j_s=j;
                mat[i][j]=2;
            }
            else if(x=='D')
            {
                i_e=i;
                j_e=j;
                mat[i][j]=3;
            }
            else if(x=='G')
            {
                mat[i][j]=4;
            }
            else
            {
                bee[i][j]=0;
                bq.push({i,j});
                mat[i][j]=5;
            }
        }
    }
    bee_bfs();
//    for(int i=1;i<=n;++i)
//    {
//        for(int j=1;j<=n;++j)
//        {
//            cout<<bee[i][j]<<" ";
//        }
//        cout<<nl;
//    }
    int st=0;
    int dr=1e9;
    int ans=-1;
    while(st<=dr)
    {
        int mid=(st+dr)/2;
        if(check(mid))
        {
             ans=mid;
            st=mid+1;
        }
        else
            dr=mid-1;
    }


    cout<<ans;




    return 0;
}

Compilation message

mecho.cpp:8: warning: "LLONG_MAX" redefined
    8 | #define LLONG_MAX 9223372036854775807
      | 
In file included from /usr/lib/gcc/x86_64-linux-gnu/10/include/limits.h:195,
                 from /usr/lib/gcc/x86_64-linux-gnu/10/include/syslimits.h:7,
                 from /usr/lib/gcc/x86_64-linux-gnu/10/include/limits.h:34,
                 from /usr/include/c++/10/climits:42,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:39,
                 from mecho.cpp:1:
/usr/include/limits.h:135: note: this is the location of the previous definition
  135 | #  define LLONG_MAX __LONG_LONG_MAX__
      | 
mecho.cpp: In function 'void bear_bfs()':
mecho.cpp:40:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   40 |         auto [x,y,dis]=q.front();
      |              ^
mecho.cpp: In function 'void bee_bfs()':
mecho.cpp:74:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   74 |         auto [x,y]=bq.front();
      |              ^

Subtask #1

100.0 / 100.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	4696 KB	Output is correct
2	Correct	1 ms	4444 KB	Output is correct
3	Correct	1 ms	4440 KB	Output is correct
4	Correct	1 ms	4440 KB	Output is correct
5	Correct	1 ms	4444 KB	Output is correct
6	Correct	1 ms	4440 KB	Output is correct
7	Correct	52 ms	8792 KB	Output is correct
8	Correct	1 ms	4444 KB	Output is correct
9	Correct	1 ms	4444 KB	Output is correct
10	Correct	1 ms	4444 KB	Output is correct
11	Correct	1 ms	4444 KB	Output is correct
12	Correct	1 ms	6748 KB	Output is correct
13	Correct	1 ms	4700 KB	Output is correct
14	Correct	1 ms	6748 KB	Output is correct
15	Correct	1 ms	4444 KB	Output is correct
16	Correct	1 ms	4584 KB	Output is correct
17	Correct	1 ms	4444 KB	Output is correct
18	Correct	1 ms	4444 KB	Output is correct
19	Correct	1 ms	4444 KB	Output is correct
20	Correct	1 ms	4444 KB	Output is correct
21	Correct	1 ms	4700 KB	Output is correct
22	Correct	1 ms	4700 KB	Output is correct
23	Correct	1 ms	4856 KB	Output is correct
24	Correct	1 ms	4700 KB	Output is correct
25	Correct	1 ms	6748 KB	Output is correct
26	Correct	1 ms	6748 KB	Output is correct
27	Correct	1 ms	6748 KB	Output is correct
28	Correct	1 ms	6748 KB	Output is correct
29	Correct	1 ms	6748 KB	Output is correct
30	Correct	1 ms	6748 KB	Output is correct
31	Correct	1 ms	6748 KB	Output is correct
32	Correct	1 ms	6748 KB	Output is correct
33	Correct	4 ms	6888 KB	Output is correct
34	Correct	6 ms	6916 KB	Output is correct
35	Correct	13 ms	6748 KB	Output is correct
36	Correct	5 ms	6900 KB	Output is correct
37	Correct	4 ms	6748 KB	Output is correct
38	Correct	17 ms	6748 KB	Output is correct
39	Correct	6 ms	7004 KB	Output is correct
40	Correct	5 ms	7004 KB	Output is correct
41	Correct	21 ms	7164 KB	Output is correct
42	Correct	6 ms	7260 KB	Output is correct
43	Correct	6 ms	7260 KB	Output is correct
44	Correct	28 ms	7260 KB	Output is correct
45	Correct	8 ms	7512 KB	Output is correct
46	Correct	10 ms	7360 KB	Output is correct
47	Correct	33 ms	7516 KB	Output is correct
48	Correct	9 ms	7772 KB	Output is correct
49	Correct	9 ms	7772 KB	Output is correct
50	Correct	40 ms	7772 KB	Output is correct
51	Correct	10 ms	7772 KB	Output is correct
52	Correct	9 ms	7936 KB	Output is correct
53	Correct	46 ms	8008 KB	Output is correct
54	Correct	13 ms	8024 KB	Output is correct
55	Correct	15 ms	8028 KB	Output is correct
56	Correct	56 ms	8028 KB	Output is correct
57	Correct	19 ms	8284 KB	Output is correct
58	Correct	13 ms	8456 KB	Output is correct
59	Correct	68 ms	8460 KB	Output is correct
60	Correct	15 ms	8536 KB	Output is correct
61	Correct	13 ms	8540 KB	Output is correct
62	Correct	73 ms	8540 KB	Output is correct
63	Correct	84 ms	8476 KB	Output is correct
64	Correct	137 ms	8536 KB	Output is correct
65	Correct	126 ms	8536 KB	Output is correct
66	Correct	91 ms	8536 KB	Output is correct
67	Correct	81 ms	8536 KB	Output is correct
68	Correct	44 ms	8536 KB	Output is correct
69	Correct	40 ms	8536 KB	Output is correct
70	Correct	30 ms	8540 KB	Output is correct
71	Correct	30 ms	8536 KB	Output is correct
72	Correct	25 ms	8536 KB	Output is correct
73	Correct	27 ms	8796 KB	Output is correct
74	Correct	40 ms	8796 KB	Output is correct
75	Correct	50 ms	8792 KB	Output is correct
76	Correct	38 ms	8832 KB	Output is correct
77	Correct	43 ms	8796 KB	Output is correct
78	Correct	45 ms	8792 KB	Output is correct
79	Correct	35 ms	8896 KB	Output is correct
80	Correct	39 ms	8792 KB	Output is correct
81	Correct	46 ms	8796 KB	Output is correct
82	Correct	39 ms	8820 KB	Output is correct
83	Correct	54 ms	8796 KB	Output is correct
84	Correct	48 ms	8792 KB	Output is correct
85	Correct	48 ms	8796 KB	Output is correct
86	Correct	52 ms	8796 KB	Output is correct
87	Correct	49 ms	8796 KB	Output is correct
88	Correct	67 ms	8844 KB	Output is correct
89	Correct	52 ms	8796 KB	Output is correct
90	Correct	57 ms	8796 KB	Output is correct
91	Correct	51 ms	8792 KB	Output is correct
92	Correct	54 ms	8796 KB	Output is correct