oj.uz

Submission #221442

# Submission time Handle Problem Language Result Execution time Memory
221442 2020-04-10T06:06:20 Z tatyam Mecho (IOI09_mecho) C++17
84 / 100
 217 ms 6448 KB 
#include <bits/stdc++.h>
using namespace std;
using pii = pair<int, int>;
const int INF = 0x3fffffff;
const int dx[] = {0, 1, 0, -1};
const int dy[] = {1, 0, -1, 0};
#define name2(a,b,c,...) c
#define rep1(b) for(int i = 0; i < b; i++)
#define rep2(i,b) for(int i = 0; i < b; i++)
#define rep(...) name2(__VA_ARGS__,rep2,rep1)(__VA_ARGS__)
#define each(i,a) for(auto&& i : a)
template<class T, class U> bool chmin(T& a, const U& b){ if(a > b){ a = b; return 1; } return 0; }
template<class T, class U> bool chmax(T& a, const U& b){ if(a < b){ a = b; return 1; } return 0; }
 
 
int main(){
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    int n, s;
    cin >> n >> s;
    vector<string> a(n);
    each(i, a) cin >> i;
    vector<vector<int>> bee(n, vector<int>(n, INF));
    queue<pii> q;
    rep(n) rep(j, n) if(a[i][j] == 'H'){
        bee[i][j] = 0;
        q.emplace(i, j);
    }
    while(q.size()){
        auto [x, y] = q.front();
        q.pop();
        rep(4){
            int x2 = x + dx[i], y2 = y + dy[i];
            if(x2 < 0 || y2 < 0 || x2 >= n || y2 >= n || a[x2][y2] != 'G') continue;
            if(chmin(bee[x2][y2], bee[x][y] + 1)) q.emplace(x2, y2);
        }
    }
    pii start, goal;
    rep(n) rep(j, n) if(a[i][j] == 'M') start = {i, j};
    rep(n) rep(j, n) if(a[i][j] == 'D') goal = {i, j};
    auto check = [&](int v) -> bool {
        vector<vector<int>> m(n, vector<int>(n, INF));
        m[start.first][start.second] = 0;
        q.push(start);
        while(q.size()){
            auto [x, y] = q.front();
            q.pop();
            int next = m[x][y] + 1;
            rep(4){
                int x2 = x + dx[i], y2 = y + dy[i];
                if(x2 < 0 || y2 < 0 || x2 >= n || y2 >= n || a[x2][y2] == 'T') continue;
                if(next / s + v < bee[x2][y2] && chmin(m[x2][y2], next)) q.emplace(x2, y2);
            }
        }
        return m[goal.first][goal.second] != INF;
    };
    int ok = -1, ng = 0x1fffff;
    while(ng - ok > 1){
        int cen = (ok + ng) / 2;
        if(check(cen)) ok = cen;
        else ng = cen;
    }
    cout << ok << endl;
}

Subtask #1
84.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 4 ms 384 KB Output is correct
4 Correct 4 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 131 ms 6232 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 5 ms 384 KB Output is correct
12 Incorrect 5 ms 384 KB Output isn't correct
13 Incorrect 5 ms 384 KB Output isn't correct
14 Correct 5 ms 384 KB Output is correct
15 Correct 5 ms 384 KB Output is correct
16 Correct 5 ms 384 KB Output is correct
17 Correct 5 ms 384 KB Output is correct
18 Correct 5 ms 384 KB Output is correct
19 Correct 5 ms 384 KB Output is correct
20 Correct 5 ms 384 KB Output is correct
21 Correct 5 ms 384 KB Output is correct
22 Correct 5 ms 384 KB Output is correct
23 Correct 5 ms 384 KB Output is correct
24 Correct 5 ms 384 KB Output is correct
25 Correct 5 ms 384 KB Output is correct
26 Correct 5 ms 384 KB Output is correct
27 Correct 5 ms 384 KB Output is correct
28 Correct 5 ms 384 KB Output is correct
29 Correct 5 ms 384 KB Output is correct
30 Correct 5 ms 384 KB Output is correct
31 Correct 5 ms 384 KB Output is correct
32 Correct 5 ms 384 KB Output is correct
33 Correct 12 ms 1540 KB Output is correct
34 Correct 12 ms 1512 KB Output is correct
35 Correct 31 ms 1508 KB Output is correct
36 Correct 13 ms 1852 KB Output is correct
37 Correct 16 ms 1856 KB Output is correct
38 Correct 41 ms 1856 KB Output is correct
39 Correct 16 ms 2272 KB Output is correct
40 Correct 16 ms 2224 KB Output is correct
41 Correct 50 ms 2224 KB Output is correct
42 Correct 19 ms 2736 KB Output is correct
43 Correct 19 ms 2736 KB Output is correct
44 Correct 61 ms 2656 KB Output is correct
45 Correct 20 ms 3200 KB Output is correct
46 Correct 20 ms 3120 KB Output is correct
47 Correct 81 ms 3192 KB Output is correct
48 Correct 24 ms 3712 KB Output is correct
49 Correct 24 ms 3648 KB Output is correct
50 Correct 94 ms 3680 KB Output is correct
51 Correct 28 ms 4280 KB Output is correct
52 Correct 30 ms 4196 KB Output is correct
53 Correct 106 ms 4252 KB Output is correct
54 Correct 32 ms 4812 KB Output is correct
55 Correct 34 ms 4860 KB Output is correct
56 Correct 131 ms 4832 KB Output is correct
57 Correct 36 ms 5528 KB Output is correct
58 Correct 36 ms 5476 KB Output is correct
59 Correct 149 ms 5488 KB Output is correct
60 Correct 39 ms 6200 KB Output is correct
61 Correct 41 ms 6200 KB Output is correct
62 Correct 177 ms 6160 KB Output is correct
63 Correct 141 ms 6244 KB Output is correct
64 Correct 214 ms 6164 KB Output is correct
65 Correct 217 ms 6160 KB Output is correct
66 Correct 175 ms 6216 KB Output is correct
67 Correct 164 ms 6220 KB Output is correct
68 Correct 75 ms 6216 KB Output is correct
69 Correct 74 ms 6184 KB Output is correct
70 Correct 65 ms 6296 KB Output is correct
71 Correct 55 ms 6284 KB Output is correct
72 Incorrect 57 ms 6224 KB Output isn't correct
73 Incorrect 102 ms 6180 KB Output isn't correct
74 Correct 90 ms 6228 KB Output is correct
75 Correct 99 ms 6180 KB Output is correct
76 Correct 98 ms 6204 KB Output is correct
77 Correct 97 ms 6228 KB Output is correct
78 Correct 112 ms 6200 KB Output is correct
79 Correct 85 ms 6212 KB Output is correct
80 Correct 98 ms 6200 KB Output is correct
81 Correct 106 ms 6272 KB Output is correct
82 Correct 99 ms 6204 KB Output is correct
83 Correct 118 ms 6192 KB Output is correct
84 Correct 106 ms 6192 KB Output is correct
85 Correct 104 ms 6260 KB Output is correct
86 Correct 119 ms 6448 KB Output is correct
87 Correct 104 ms 6192 KB Output is correct
88 Correct 116 ms 6168 KB Output is correct
89 Correct 115 ms 6236 KB Output is correct
90 Correct 154 ms 6340 KB Output is correct
91 Correct 119 ms 6224 KB Output is correct
92 Correct 122 ms 6168 KB Output is correct