oj.uz

답안 #960603

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
960603 2024-04-10T16:45:47 Z htphong0909 Mecho (IOI09_mecho) C++17
100 / 100
 137 ms 15368 KB 
#include<bits/stdc++.h>
using namespace std;
#define fi first
#define se second
 
using ll = long long;
using ii = pair<int, int>;
 
const int N = 1e6+5;
const int INF = 1e9;
 
ll d[1000][1000],m[1000][1000],n,s;
char a[1000][1000];
ll dx[4]={1,0,0,-1};
ll dy[4]={0,1,-1,0};
ii pos,h;
 
bool bfs(ll x) {
    if (d[pos.fi][pos.se] - x * s <= 0) return 0;
    queue<ii> q;
    q.push(pos);
    for(int i=0;i<n;i++) {
        for(int j=0;j<n;j++) {
            m[i][j]=0;
        }
    }
    while(!q.empty()) {
        ii u=q.front();
        q.pop();
        for(int i=0;i<4;i++) {
            ii v={u.fi+dx[i],u.se+dy[i]};
            if(v.fi<0 || v.fi>=n || v.se<0 || v.se>=n) continue;
            if(m[v.fi][v.se]==0 && a[v.fi][v.se]!='T' &&
               d[v.fi][v.se]-x*s>m[u.fi][u.se]+1 && a[v.fi][v.se]!='M') {
                m[v.fi][v.se]=m[u.fi][u.se]+1;
                q.push(v);
            }
        }
    }
    if(m[h.fi][h.se]>0) return 1; else return 0;
}
 
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    queue<ii> q;
    cin >> n >> s;
    for(int i=0;i<n;i++) {
        for(int j=0;j<n;j++) {
            cin >> a[i][j];
            if(a[i][j]=='H') {
                q.push({i,j});
            }
            if(a[i][j]=='M') pos={i,j};
            if(a[i][j]=='D') h={i,j};
        }
    }
    while(!q.empty()) {
        ii u=q.front();
        q.pop();
        for(int i=0;i<4;i++) {
            ii v={u.fi+dx[i],u.se+dy[i]};
            if(v.fi<0 || v.fi>=n || v.se<0 || v.se>=n) continue;
            if(d[v.fi][v.se]==0 && a[v.fi][v.se]!='T' && a[v.fi][v.se]!='H' && a[v.fi][v.se]!='D') {
                d[v.fi][v.se]=d[u.fi][u.se]+s;
                q.push(v);
            }
        }
    }
    d[h.fi][h.se] = INF;
    ll l=0,r=99999999,ans=-1;
    while(l<=r) {
        ll m=(l+r)/2;
        if(bfs(m)) {
            ans=m;
            l=m+1;
        }
        else {
            r=m-1;
        }
    }
    cout << ans;
    return 0;
}

Subtask #1
100.0 / 100.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2392 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 49 ms 15196 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 2 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2648 KB Output is correct
13 Correct 1 ms 2652 KB Output is correct
14 Correct 1 ms 2652 KB Output is correct
15 Correct 1 ms 2392 KB Output is correct
16 Correct 1 ms 2392 KB Output is correct
17 Correct 1 ms 2396 KB Output is correct
18 Correct 1 ms 2652 KB Output is correct
19 Correct 1 ms 2652 KB Output is correct
20 Correct 1 ms 2652 KB Output is correct
21 Correct 1 ms 2652 KB Output is correct
22 Correct 1 ms 2652 KB Output is correct
23 Correct 1 ms 2648 KB Output is correct
24 Correct 1 ms 2652 KB Output is correct
25 Correct 1 ms 2652 KB Output is correct
26 Correct 1 ms 2772 KB Output is correct
27 Correct 1 ms 2652 KB Output is correct
28 Correct 1 ms 2652 KB Output is correct
29 Correct 1 ms 2908 KB Output is correct
30 Correct 1 ms 2652 KB Output is correct
31 Correct 1 ms 2908 KB Output is correct
32 Correct 1 ms 2908 KB Output is correct
33 Correct 4 ms 6492 KB Output is correct
34 Correct 4 ms 6748 KB Output is correct
35 Correct 12 ms 7104 KB Output is correct
36 Correct 5 ms 6900 KB Output is correct
37 Correct 6 ms 7260 KB Output is correct
38 Correct 17 ms 7600 KB Output is correct
39 Correct 7 ms 9308 KB Output is correct
40 Correct 6 ms 9564 KB Output is correct
41 Correct 21 ms 10180 KB Output is correct
42 Correct 7 ms 9560 KB Output is correct
43 Correct 7 ms 10076 KB Output is correct
44 Correct 25 ms 10720 KB Output is correct
45 Correct 10 ms 10048 KB Output is correct
46 Correct 8 ms 10588 KB Output is correct
47 Correct 32 ms 11100 KB Output is correct
48 Correct 10 ms 10332 KB Output is correct
49 Correct 10 ms 10844 KB Output is correct
50 Correct 36 ms 11480 KB Output is correct
51 Correct 11 ms 10588 KB Output is correct
52 Correct 10 ms 11096 KB Output is correct
53 Correct 54 ms 11864 KB Output is correct
54 Correct 13 ms 12888 KB Output is correct
55 Correct 15 ms 13660 KB Output is correct
56 Correct 56 ms 14172 KB Output is correct
57 Correct 15 ms 13192 KB Output is correct
58 Correct 14 ms 13960 KB Output is correct
59 Correct 67 ms 14724 KB Output is correct
60 Correct 16 ms 13608 KB Output is correct
61 Correct 15 ms 14172 KB Output is correct
62 Correct 87 ms 15004 KB Output is correct
63 Correct 76 ms 14940 KB Output is correct
64 Correct 102 ms 15104 KB Output is correct
65 Correct 137 ms 15100 KB Output is correct
66 Correct 84 ms 15108 KB Output is correct
67 Correct 91 ms 15104 KB Output is correct
68 Correct 39 ms 14940 KB Output is correct
69 Correct 35 ms 14940 KB Output is correct
70 Correct 34 ms 15344 KB Output is correct
71 Correct 29 ms 15140 KB Output is correct
72 Correct 25 ms 14940 KB Output is correct
73 Correct 26 ms 15356 KB Output is correct
74 Correct 35 ms 15196 KB Output is correct
75 Correct 37 ms 15196 KB Output is correct
76 Correct 44 ms 15192 KB Output is correct
77 Correct 40 ms 15368 KB Output is correct
78 Correct 48 ms 15364 KB Output is correct
79 Correct 39 ms 15192 KB Output is correct
80 Correct 39 ms 15196 KB Output is correct
81 Correct 44 ms 15336 KB Output is correct
82 Correct 38 ms 15196 KB Output is correct
83 Correct 59 ms 15200 KB Output is correct
84 Correct 41 ms 15192 KB Output is correct
85 Correct 48 ms 15300 KB Output is correct
86 Correct 50 ms 15192 KB Output is correct
87 Correct 46 ms 15196 KB Output is correct
88 Correct 47 ms 15192 KB Output is correct
89 Correct 48 ms 15196 KB Output is correct
90 Correct 72 ms 15244 KB Output is correct
91 Correct 56 ms 15244 KB Output is correct
92 Correct 52 ms 15192 KB Output is correct