oj.uz

Submission #688151

# Submission time Handle Problem Language Result Execution time Memory
688151 2023-01-27T07:58:37 Z ar88lo Mecho (IOI09_mecho) C++14
84 / 100
 187 ms 15564 KB 
#include <bits/stdc++.h>
#define int long long
#define double (long double)
using namespace std;

struct node{
    int x; int y;
};

const int max_n = 1000, INF = 1e8;
int n,s;
string a[max_n];
bool ch[max_n][max_n];
int dis[max_n][max_n][2];
queue<node> src;
node st,dt;
bool isin(node u){
    return (u.x >= 0 && u.y >= 0 && u.x < n && u.y < n);
}
bool safe(node u, int h){
    return (dis[u.x][u.y][0] - h > dis[u.x][u.y][1]/s);
}
void f(node v, node u){
    if(isin(v) && !ch[v.x][v.y] && a[v.x][v.y] != 'T' && a[v.x][v.y] != 'D'){
        dis[v.x][v.y][0] = dis[u.x][u.y][0] + 1;
        ch[v.x][v.y] = 1;
        src.push(v);
    }
}
void g(node v, node u, int h){
    if(isin(v) && ch[v.x][v.y] == 0 && a[v.x][v.y] != 'T'){
        dis[v.x][v.y][1] = dis[u.x][u.y][1] + 1;
        if(safe(v, h)){
        ch[v.x][v.y] = 1;
        src.push(v);
        }
    }
}
void relax1(node v){
    
    node u,d,l,r;
    u = d = l = r = v;
    u.y++; d.y--; l.x--; r.x++;
    f(u, v); f(d, v); f(l, v); f(r, v);
}
void relax2(node v, int h){

    node u,d,l,r;
    u = d = l = r = v;
    u.y++; d.y--; l.x--; r.x++;
    g(u, v, h); g(d, v, h); g(l, v, h); g(r, v, h);
}
bool check(int h){

    for(int i = 0; i <= n; i++){
        for(int j = 0; j <= n; j++){
            ch[i][j] = 0;
            dis[i][j][1] = INF;
        }
    }
    ch[st.x][st.y] = 1;
    dis[st.x][st.y][1] = 0;
    src.push(st);
    while(!src.empty()){
        node u = src.front();
        src.pop();
        relax2(u, h);
    }
    return ch[dt.x][dt.y];
}
void bfs(){

    for(int i = 0; i <= n; i++){
        for(int j = 0; j <= n; j++){
            ch[i][j] = 0;
        }
    }
    queue<node>temp = src;
    while(!temp.empty()){
        ch[temp.front().x][temp.front().y] = 1;
        temp.pop();
    }
    while(!src.empty()){
        node u = src.front();
        src.pop();
        relax1(u);
    }
}
int32_t main(){
    
    ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    node temp;
    cin>>n>>s;
    for(int i = 0; i < n; i++){
        cin>>a[i];
        for(int j = 0; j < n; j++){
            if(a[i][j] == 'M'){
                st.x = i; st.y = j;
            }
            if(a[i][j] == 'D'){
                dt.x = i; dt.y = j;
            }
            if(a[i][j] == 'H'){
                temp.x = i; temp.y = j;
                src.push(temp);
            }
        }
    }
    bfs();
    src.push(st);
    dis[dt.x][dt.y][0] = INF * INF;
    int ans = -1;
    for(int k = INF; k > 0; k /= 2){
        while(ans + k < INF && check(ans + k)) ans += k;
    }
    cout<<ans<<'\n';

    return 0;
}

Subtask #1
84.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 158 ms 15196 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 360 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Incorrect 1 ms 724 KB Output isn't correct
13 Incorrect 1 ms 596 KB Output isn't correct
14 Correct 1 ms 724 KB Output is correct
15 Correct 1 ms 468 KB Output is correct
16 Correct 1 ms 468 KB Output is correct
17 Correct 1 ms 468 KB Output is correct
18 Correct 1 ms 468 KB Output is correct
19 Correct 1 ms 480 KB Output is correct
20 Correct 1 ms 468 KB Output is correct
21 Correct 1 ms 596 KB Output is correct
22 Correct 1 ms 596 KB Output is correct
23 Correct 1 ms 596 KB Output is correct
24 Correct 1 ms 596 KB Output is correct
25 Correct 1 ms 724 KB Output is correct
26 Correct 1 ms 724 KB Output is correct
27 Correct 1 ms 724 KB Output is correct
28 Correct 1 ms 744 KB Output is correct
29 Correct 1 ms 724 KB Output is correct
30 Correct 1 ms 724 KB Output is correct
31 Correct 1 ms 748 KB Output is correct
32 Correct 1 ms 724 KB Output is correct
33 Correct 6 ms 4188 KB Output is correct
34 Correct 7 ms 4208 KB Output is correct
35 Correct 18 ms 4304 KB Output is correct
36 Correct 7 ms 5076 KB Output is correct
37 Correct 8 ms 5204 KB Output is correct
38 Correct 24 ms 5076 KB Output is correct
39 Correct 10 ms 6080 KB Output is correct
40 Correct 8 ms 6100 KB Output is correct
41 Correct 43 ms 6184 KB Output is correct
42 Correct 12 ms 7328 KB Output is correct
43 Correct 11 ms 7284 KB Output is correct
44 Correct 41 ms 7252 KB Output is correct
45 Correct 15 ms 8492 KB Output is correct
46 Correct 16 ms 8436 KB Output is correct
47 Correct 67 ms 8492 KB Output is correct
48 Correct 32 ms 9720 KB Output is correct
49 Correct 24 ms 9732 KB Output is correct
50 Correct 80 ms 9736 KB Output is correct
51 Correct 29 ms 10964 KB Output is correct
52 Correct 27 ms 11012 KB Output is correct
53 Correct 96 ms 11004 KB Output is correct
54 Correct 42 ms 12564 KB Output is correct
55 Correct 42 ms 12500 KB Output is correct
56 Correct 128 ms 12476 KB Output is correct
57 Correct 54 ms 13900 KB Output is correct
58 Correct 53 ms 13980 KB Output is correct
59 Correct 154 ms 14004 KB Output is correct
60 Correct 64 ms 14932 KB Output is correct
61 Correct 62 ms 14924 KB Output is correct
62 Correct 187 ms 14928 KB Output is correct
63 Correct 126 ms 14976 KB Output is correct
64 Correct 178 ms 15052 KB Output is correct
65 Correct 181 ms 14888 KB Output is correct
66 Correct 167 ms 14976 KB Output is correct
67 Correct 128 ms 14988 KB Output is correct
68 Correct 77 ms 14924 KB Output is correct
69 Correct 84 ms 14984 KB Output is correct
70 Correct 76 ms 15036 KB Output is correct
71 Correct 72 ms 15048 KB Output is correct
72 Incorrect 71 ms 15004 KB Output isn't correct
73 Incorrect 82 ms 15480 KB Output isn't correct
74 Correct 96 ms 15432 KB Output is correct
75 Correct 107 ms 15504 KB Output is correct
76 Correct 101 ms 15432 KB Output is correct
77 Correct 113 ms 15500 KB Output is correct
78 Correct 90 ms 15564 KB Output is correct
79 Correct 105 ms 15432 KB Output is correct
80 Correct 87 ms 15480 KB Output is correct
81 Correct 95 ms 15468 KB Output is correct
82 Correct 93 ms 15480 KB Output is correct
83 Correct 137 ms 15404 KB Output is correct
84 Correct 147 ms 15392 KB Output is correct
85 Correct 123 ms 15272 KB Output is correct
86 Correct 132 ms 15308 KB Output is correct
87 Correct 158 ms 15388 KB Output is correct
88 Correct 152 ms 15300 KB Output is correct
89 Correct 160 ms 15300 KB Output is correct
90 Correct 167 ms 15296 KB Output is correct
91 Correct 178 ms 15436 KB Output is correct
92 Correct 156 ms 15180 KB Output is correct