oj.uz

Submission #245582

# Submission time Handle Problem Language Result Execution time Memory
245582 2020-07-06T20:08:38 Z tatyam Mecho (IOI09_mecho) C++17
100 / 100
 272 ms 6336 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' && a[x2][y2] != 'M') 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 {
        if(bee[start.first][start.second] <= v) return false;
        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 = n * n;
    while(ng - ok > 1){
        int cen = (ok + ng) / 2;
        if(check(cen)) ok = cen;
        else ng = cen;
    }
    cout << ok << endl;
}

Compilation message

mecho.cpp: In function 'int main()':
mecho.cpp:34:75: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
             if(x2 < 0 || y2 < 0 || x2 >= n || y2 >= n || a[x2][y2] != 'G' && a[x2][y2] != 'M') continue;

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 4 ms 384 KB Output is correct
4 Correct 5 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 126 ms 6148 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 Correct 5 ms 384 KB Output is correct
13 Correct 5 ms 384 KB Output is 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 512 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 10 ms 1508 KB Output is correct
34 Correct 11 ms 1536 KB Output is correct
35 Correct 31 ms 1604 KB Output is correct
36 Correct 11 ms 1884 KB Output is correct
37 Correct 14 ms 1792 KB Output is correct
38 Correct 39 ms 1792 KB Output is correct
39 Correct 14 ms 2248 KB Output is correct
40 Correct 16 ms 2248 KB Output is correct
41 Correct 58 ms 2232 KB Output is correct
42 Correct 18 ms 2680 KB Output is correct
43 Correct 20 ms 2684 KB Output is correct
44 Correct 65 ms 2668 KB Output is correct
45 Correct 20 ms 3184 KB Output is correct
46 Correct 20 ms 3180 KB Output is correct
47 Correct 70 ms 3148 KB Output is correct
48 Correct 25 ms 3704 KB Output is correct
49 Correct 29 ms 3672 KB Output is correct
50 Correct 85 ms 3644 KB Output is correct
51 Correct 28 ms 4188 KB Output is correct
52 Correct 27 ms 4208 KB Output is correct
53 Correct 120 ms 4204 KB Output is correct
54 Correct 31 ms 4880 KB Output is correct
55 Correct 33 ms 4824 KB Output is correct
56 Correct 130 ms 4832 KB Output is correct
57 Correct 34 ms 5476 KB Output is correct
58 Correct 40 ms 5504 KB Output is correct
59 Correct 152 ms 5448 KB Output is correct
60 Correct 37 ms 6160 KB Output is correct
61 Correct 42 ms 6160 KB Output is correct
62 Correct 166 ms 6164 KB Output is correct
63 Correct 139 ms 6168 KB Output is correct
64 Correct 272 ms 6144 KB Output is correct
65 Correct 194 ms 6160 KB Output is correct
66 Correct 184 ms 6240 KB Output is correct
67 Correct 157 ms 6160 KB Output is correct
68 Correct 68 ms 6180 KB Output is correct
69 Correct 65 ms 6208 KB Output is correct
70 Correct 49 ms 6160 KB Output is correct
71 Correct 57 ms 6200 KB Output is correct
72 Correct 39 ms 6144 KB Output is correct
73 Correct 41 ms 6136 KB Output is correct
74 Correct 83 ms 6144 KB Output is correct
75 Correct 102 ms 6160 KB Output is correct
76 Correct 94 ms 6184 KB Output is correct
77 Correct 95 ms 6204 KB Output is correct
78 Correct 106 ms 6164 KB Output is correct
79 Correct 68 ms 6200 KB Output is correct
80 Correct 87 ms 6144 KB Output is correct
81 Correct 90 ms 6212 KB Output is correct
82 Correct 83 ms 6260 KB Output is correct
83 Correct 111 ms 6120 KB Output is correct
84 Correct 129 ms 6276 KB Output is correct
85 Correct 134 ms 6128 KB Output is correct
86 Correct 115 ms 6120 KB Output is correct
87 Correct 153 ms 6148 KB Output is correct
88 Correct 110 ms 6176 KB Output is correct
89 Correct 136 ms 6180 KB Output is correct
90 Correct 110 ms 6156 KB Output is correct
91 Correct 103 ms 6180 KB Output is correct
92 Correct 117 ms 6336 KB Output is correct