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답안 #442318

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
442318 2021-07-07T12:39:14 Z Haidara Mecho (IOI09_mecho) C++17
58 / 100
 231 ms 7236 KB 
/* * * * * * * * * *\
 * Author: Haidara *
 * LANG: C++17     *
 * PROB:           *
\* * * * * * * * * */
#include<bits/stdc++.h>
#define fast ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
#define int long long
#define rep(i,x,n) for(int i=x;i<(n);i++)
#define FOR(i,n) rep(i,0,n)
#define per(i,x,n) for(int i=x;i>(n);i--)
#define ROF(i,x) for(int i=x;i>=0;i--)
#define v(i) vector< i >
#define p(i,j) pair< i , j >
#define pii pair<int,int>
#define m(i,j) map< i , j >
#define um(i,j) unordered_map< i , j >
#define pq(i) priority_queue< i >
#define ff first
#define all(x) x.begin(),x.end()
#define ss second
#define pp push_back
using namespace std;
void SIO(string name="")
{
    if(name!="")
    {
        freopen((name+".in").c_str(),"r",stdin);
        freopen((name+".out").c_str(),"w",stdout);
    }
}
const int inf=1LL<<62LL;
const int mod=1e9+7;
const int maxn=808;
char a[maxn][maxn];
int n,jump;
pii M,D;
queue<pii>q;
int dist[maxn][maxn],dx[] {-1,1,0,0},dy[] {0,0,1,-1};
bool valid(int x,int y)
{
    return x>=0&&y>=0&&x<n&&y<n&&a[x][y]!='T';
}
void solve()
{
    while(q.size())
    {
        pii f=q.front();
        q.pop();
        FOR(i,4)
        {
            int x=f.ff+dx[i],y=f.ss+dy[i];
            if(valid(x,y)&&dist[f.ff][f.ss]+jump<dist[x][y])
                dist[x][y]=dist[f.ff][f.ss]+jump,q.push({x,y});
        }
    }
}
bool check(int st)
{
    queue<p(pii,int)>qq;
    qq.push({M,st*jump});
    bool vis[maxn][maxn];
    FOR(i,maxn)
    FOR(j,maxn)
    vis[i][j]=0;
    bool ret=0;
    vis[M.ff][M.ss]=1;
    while(qq.size())
    {
        pii f=qq.front().ff;
        int curr=qq.front().ss;
        qq.pop();
        if(f==D)
            ret=1;
        FOR(i,4)
        {
            int x=f.ff+dx[i],y=f.ss+dy[i];
            if(valid(x,y))
            {
                if(dist[x][y]>curr+1&&!vis[x][y])
                    qq.push({{x,y},curr+1}),vis[x][y]=1;
            }
        }
    }
    return ret;
}
signed main()
{
    SIO("");
    cin>>n>>jump;
    FOR(i,n)
    FOR(j,n)
    {
        dist[i][j]=inf;
        cin>>a[i][j];
        if(a[i][j]=='M')
            M= {i,j};
        else if(a[i][j]=='D')
            D= {i,j};
        else if(a[i][j]=='H')
            q.push({i,j}),dist[i][j]=0;
    }
    solve();
    int l=1,r=maxn*maxn*2,ans=-1;
    while(l<=r)
    {
        int mid=l+(r-l)/2;
        if(check(mid))
            ans=max(ans,mid),l=mid+1;
        else
            r=mid-1;
    }
    cout<<ans;
}

Compilation message

mecho.cpp: In function 'void SIO(std::string)':
mecho.cpp:28:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   28 |         freopen((name+".in").c_str(),"r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
mecho.cpp:29:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   29 |         freopen((name+".out").c_str(),"w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
58.0 / 100.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 844 KB Output is correct
2 Incorrect 1 ms 844 KB Output isn't correct
3 Correct 1 ms 844 KB Output is correct
4 Incorrect 2 ms 844 KB Output isn't correct
5 Incorrect 1 ms 844 KB Output isn't correct
6 Incorrect 1 ms 972 KB Output isn't correct
7 Incorrect 148 ms 6956 KB Output isn't correct
8 Correct 1 ms 972 KB Output is correct
9 Correct 1 ms 972 KB Output is correct
10 Correct 1 ms 972 KB Output is correct
11 Correct 1 ms 972 KB Output is correct
12 Incorrect 2 ms 1228 KB Output isn't correct
13 Incorrect 2 ms 1100 KB Output isn't correct
14 Correct 2 ms 1228 KB Output is correct
15 Correct 2 ms 972 KB Output is correct
16 Correct 2 ms 972 KB Output is correct
17 Correct 1 ms 972 KB Output is correct
18 Correct 2 ms 972 KB Output is correct
19 Correct 1 ms 1100 KB Output is correct
20 Correct 2 ms 1100 KB Output is correct
21 Correct 2 ms 1100 KB Output is correct
22 Correct 1 ms 1100 KB Output is correct
23 Correct 2 ms 1100 KB Output is correct
24 Correct 2 ms 1100 KB Output is correct
25 Correct 2 ms 1228 KB Output is correct
26 Correct 2 ms 1252 KB Output is correct
27 Correct 2 ms 1228 KB Output is correct
28 Correct 2 ms 1228 KB Output is correct
29 Correct 2 ms 1228 KB Output is correct
30 Correct 2 ms 1228 KB Output is correct
31 Correct 2 ms 1228 KB Output is correct
32 Correct 2 ms 1228 KB Output is correct
33 Correct 12 ms 3424 KB Output is correct
34 Correct 15 ms 3404 KB Output is correct
35 Correct 37 ms 3420 KB Output is correct
36 Correct 17 ms 3692 KB Output is correct
37 Correct 16 ms 3788 KB Output is correct
38 Correct 50 ms 3788 KB Output is correct
39 Correct 18 ms 4044 KB Output is correct
40 Correct 19 ms 4044 KB Output is correct
41 Correct 59 ms 4148 KB Output is correct
42 Correct 24 ms 4464 KB Output is correct
43 Correct 22 ms 4400 KB Output is correct
44 Correct 91 ms 4420 KB Output is correct
45 Correct 27 ms 4804 KB Output is correct
46 Correct 35 ms 4828 KB Output is correct
47 Correct 93 ms 4856 KB Output is correct
48 Correct 30 ms 5068 KB Output is correct
49 Correct 30 ms 5112 KB Output is correct
50 Correct 107 ms 5184 KB Output is correct
51 Correct 37 ms 5504 KB Output is correct
52 Correct 37 ms 5548 KB Output is correct
53 Correct 141 ms 5556 KB Output is correct
54 Correct 46 ms 5816 KB Output is correct
55 Correct 43 ms 5904 KB Output is correct
56 Correct 174 ms 6040 KB Output is correct
57 Correct 47 ms 6252 KB Output is correct
58 Correct 50 ms 6252 KB Output is correct
59 Correct 188 ms 6268 KB Output is correct
60 Correct 55 ms 6556 KB Output is correct
61 Correct 58 ms 6596 KB Output is correct
62 Correct 212 ms 6628 KB Output is correct
63 Incorrect 143 ms 6532 KB Output isn't correct
64 Correct 231 ms 6600 KB Output is correct
65 Correct 215 ms 6616 KB Output is correct
66 Correct 169 ms 6680 KB Output is correct
67 Correct 173 ms 6724 KB Output is correct
68 Incorrect 88 ms 6580 KB Output isn't correct
69 Correct 82 ms 6568 KB Output is correct
70 Correct 83 ms 6616 KB Output is correct
71 Correct 95 ms 6596 KB Output is correct
72 Incorrect 68 ms 6696 KB Output isn't correct
73 Incorrect 76 ms 7144 KB Output isn't correct
74 Correct 103 ms 7108 KB Output is correct
75 Correct 138 ms 7144 KB Output is correct
76 Correct 117 ms 7236 KB Output is correct
77 Correct 119 ms 7124 KB Output is correct
78 Correct 135 ms 7100 KB Output is correct
79 Correct 93 ms 7028 KB Output is correct
80 Correct 109 ms 7228 KB Output is correct
81 Correct 121 ms 7092 KB Output is correct
82 Correct 119 ms 7080 KB Output is correct
83 Incorrect 146 ms 6980 KB Output isn't correct
84 Correct 139 ms 7032 KB Output is correct
85 Correct 125 ms 7032 KB Output is correct
86 Correct 142 ms 6944 KB Output is correct
87 Correct 145 ms 7028 KB Output is correct
88 Incorrect 145 ms 6852 KB Output isn't correct
89 Correct 160 ms 6940 KB Output is correct
90 Correct 163 ms 6884 KB Output is correct
91 Correct 148 ms 6932 KB Output is correct
92 Correct 177 ms 6932 KB Output is correct