oj.uz

Submission #1081264

# Submission time Handle Problem Language Result Execution time Memory
1081264 2024-08-29T20:44:02 Z Dennis_Jason Mecho (IOI09_mecho) C++14
69 / 100
 138 ms 8652 KB 
#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)
            {
                bee[inou][jnou]=bee[x][y]+1;
                bq.push({inou,jnou});
            }
        }
    }
}
bool check(int sec)
{
    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=1;
    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
69.0 / 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 Incorrect 0 ms 348 KB Output isn't correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 70 ms 8652 KB Output is correct
8 Correct 0 ms 604 KB Output is correct
9 Correct 1 ms 604 KB Output is correct
10 Correct 0 ms 604 KB Output is correct
11 Correct 0 ms 604 KB Output is correct
12 Incorrect 1 ms 860 KB Output isn't correct
13 Incorrect 1 ms 860 KB Output isn't correct
14 Correct 1 ms 856 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 1 ms 604 KB Output is correct
17 Correct 0 ms 604 KB Output is correct
18 Correct 1 ms 604 KB Output is correct
19 Correct 1 ms 604 KB Output is correct
20 Correct 1 ms 604 KB Output is correct
21 Correct 0 ms 860 KB Output is correct
22 Correct 1 ms 860 KB Output is correct
23 Correct 1 ms 728 KB Output is correct
24 Correct 1 ms 860 KB Output is correct
25 Correct 1 ms 860 KB Output is correct
26 Correct 1 ms 860 KB Output is correct
27 Correct 1 ms 1116 KB Output is correct
28 Correct 1 ms 1116 KB Output is correct
29 Correct 1 ms 1116 KB Output is correct
30 Correct 1 ms 1116 KB Output is correct
31 Correct 1 ms 1116 KB Output is correct
32 Correct 1 ms 1116 KB Output is correct
33 Correct 5 ms 3916 KB Output is correct
34 Correct 5 ms 3676 KB Output is correct
35 Correct 15 ms 3916 KB Output is correct
36 Correct 7 ms 4428 KB Output is correct
37 Correct 6 ms 4188 KB Output is correct
38 Correct 26 ms 4380 KB Output is correct
39 Correct 8 ms 4700 KB Output is correct
40 Correct 8 ms 4708 KB Output is correct
41 Correct 27 ms 4948 KB Output is correct
42 Correct 9 ms 5264 KB Output is correct
43 Correct 9 ms 5212 KB Output is correct
44 Correct 34 ms 5464 KB Output is correct
45 Correct 16 ms 5980 KB Output is correct
46 Correct 10 ms 5980 KB Output is correct
47 Correct 39 ms 5980 KB Output is correct
48 Correct 15 ms 6492 KB Output is correct
49 Correct 12 ms 6516 KB Output is correct
50 Correct 46 ms 6488 KB Output is correct
51 Correct 14 ms 7004 KB Output is correct
52 Correct 13 ms 6884 KB Output is correct
53 Correct 55 ms 7036 KB Output is correct
54 Correct 17 ms 7516 KB Output is correct
55 Correct 15 ms 7592 KB Output is correct
56 Correct 74 ms 7516 KB Output is correct
57 Correct 19 ms 8028 KB Output is correct
58 Correct 18 ms 8088 KB Output is correct
59 Correct 70 ms 8028 KB Output is correct
60 Correct 19 ms 8024 KB Output is correct
61 Correct 19 ms 8028 KB Output is correct
62 Correct 80 ms 8036 KB Output is correct
63 Incorrect 87 ms 8028 KB Output isn't correct
64 Correct 138 ms 8028 KB Output is correct
65 Correct 131 ms 8028 KB Output is correct
66 Correct 97 ms 8036 KB Output is correct
67 Correct 89 ms 8036 KB Output is correct
68 Incorrect 46 ms 8028 KB Output isn't correct
69 Correct 45 ms 8028 KB Output is correct
70 Correct 42 ms 7912 KB Output is correct
71 Correct 34 ms 8028 KB Output is correct
72 Incorrect 38 ms 8024 KB Output isn't correct
73 Incorrect 50 ms 8280 KB Output isn't correct
74 Correct 45 ms 8284 KB Output is correct
75 Correct 52 ms 8284 KB Output is correct
76 Correct 50 ms 8284 KB Output is correct
77 Correct 48 ms 8284 KB Output is correct
78 Correct 54 ms 8284 KB Output is correct
79 Correct 42 ms 8300 KB Output is correct
80 Correct 49 ms 8284 KB Output is correct
81 Correct 51 ms 8284 KB Output is correct
82 Correct 44 ms 8284 KB Output is correct
83 Incorrect 55 ms 8028 KB Output isn't correct
84 Correct 54 ms 8024 KB Output is correct
85 Correct 60 ms 8240 KB Output is correct
86 Correct 57 ms 8028 KB Output is correct
87 Correct 58 ms 8028 KB Output is correct
88 Incorrect 54 ms 8028 KB Output isn't correct
89 Correct 59 ms 8024 KB Output is correct
90 Correct 65 ms 8028 KB Output is correct
91 Correct 63 ms 8024 KB Output is correct
92 Correct 61 ms 8028 KB Output is correct