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Submission #571016

# Submission time Handle Problem Language Result Execution time Memory
571016 2022-06-01T04:31:43 Z f4t4nt Mecho (IOI09_mecho) C++11
72 / 100
 414 ms 16520 KB 
#include <algorithm>
#include <cmath>
#include <ctime>
#include <deque>
#include <fstream>
#include <functional>
#include <iostream>
#include <iomanip>
#include <iterator>
#include <list>
#include <map>
#include <math.h>
#include <numeric>
#include <queue>
#include <random>
#include <set>
#include <sstream>
#include <stack>
#include <stdio.h>
#include <string>
#include <tuple>
#include <unordered_set>
#include <utility>
#include <vector>

using namespace std;

using ll = long long;
using ull = unsigned long long;
using ld = long double;
using ch = char;
using str = string;

#define pb push_back
#define elif else if
#define sz(C) (ll) C.size()
#define mp make_pair
#define mt make_tuple
#define flip(C) reverse(C.begin(), C.end())
#define ssort(C) sort(C.begin(), C.end())
#define rsort(C) sort(C.begin(), C.end(), greater<>())

#define FOR(x, e) for(ll  x = 0; x < (ll) e; x++)
#define FORR(x, e) for(ll x = (ll) e - 1; x >= 0; x--)
#define FOB(x, b, e) for(auto x = b; x < e; x++)
#define FOI(x, e, i) for(ll x = 0; x < (ll) e; x += (ll) i)
#define FOBI(x, b, e, i) for(ll x = (ll) b; x < (ll) e; x += (ll) i)
#define FORE(x, C) for(auto &x : C)

#ifdef LOCAL
#include "tester.cpp"
#define main test_main
extern istringstream fin;
extern ostringstream fout;
string test_file_name = "tests";
#define cin fin
#define cout fout
#endif

vector<int> di { -1, 0, 1, 0};
vector<int> dj { 0, -1, 0, 1};

void fill_b(ll &n, vector<vector<char>> &g, queue<pair<ll, ll>> &bfs_b, vector<vector<ll>> &d_b) {
    while(sz(bfs_b)) {
        ll i0 = bfs_b.front().first, j0 = bfs_b.front().second;
        bfs_b.pop();
        FOR(k, 4) {
            ll i1 = i0 + di[k], j1 = j0 + dj[k];
            if(i1 < 0 || i1 >= n || j1 < 0 || j1 >= n) continue;
            if(g[i1][j1] == 'T' || g[i1][j1] == 'D') continue;
            if(d_b[i1][j1] != 1e18) continue;
            d_b[i1][j1] = d_b[i0][j0] + 1;
            bfs_b.push({i1, j1});
        }
    }
}

bool valid(ll &mid, ll &n, ll &s, vector<vector<ll>> &d_b, vector<vector<char>> &g, queue<pair<ll, ll>> bfs_m, vector<vector<ll>> d_m) {
    while(sz(bfs_m)) {
        ll i0 = bfs_m.front().first, j0 = bfs_m.front().second, d = d_m[i0][j0] + 1;
        bfs_m.pop();
        FOR(k, 4) {
            ll i1 = i0 + di[k], j1 = j0 + dj[k];
            if(i1 < 0 || i1 >= n || j1 < 0 || j1 >= n) continue;
            if(g[i1][j1] == 'T') continue;
            if(d_m[i1][j1] != 1e18) continue;
            if(d_b[i1][j1] < mid + d / s) continue;
            if(g[i1][j1] == 'D') return true;
            d_m[i1][j1] = d;
            bfs_m.push({i1, j1});
        }
    }
    return false;
}

int main() {
    ll n, s, lo = -1, hi = 1e18;
    cin >> n >> s;
    vector<vector<char>> g(n, vector<char>(n));
    vector<vector<ll>> d_b(n, vector<ll>(n, 1e18)), d_m(n, vector<ll>(n, 1e18));
    queue<pair<ll, ll>> bfs_b, bfs_m;
    FOR(i, n) FOR(j, n) {
        cin >> g[i][j];
        if(g[i][j] == 'H') {
            bfs_b.push({i, j});
            d_b[i][j] = 0;
        }
        elif(g[i][j] == 'M') {
            bfs_m.push({i, j});
            d_m[i][j] = 0;
        }
    }
    fill_b(n, g, bfs_b, d_b);
    while(hi - lo > 0) {
        ll mid = lo + (hi - lo + 1) / 2;
        if(valid(mid, n, s, d_b, g, bfs_m, d_m)) lo = mid;
        else hi = mid - 1;
    }
    cout << lo - 1 << '\n';
    return 0;
}

Subtask #1
72.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 268 ms 16220 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Incorrect 1 ms 340 KB Output isn't correct
13 Incorrect 1 ms 340 KB Output isn't correct
14 Incorrect 2 ms 340 KB Output isn't correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 1 ms 340 KB Output is correct
30 Correct 2 ms 340 KB Output is correct
31 Correct 2 ms 340 KB Output is correct
32 Correct 2 ms 340 KB Output is correct
33 Correct 31 ms 3532 KB Output is correct
34 Correct 27 ms 3580 KB Output is correct
35 Correct 43 ms 3348 KB Output is correct
36 Correct 37 ms 4476 KB Output is correct
37 Correct 35 ms 4456 KB Output is correct
38 Correct 65 ms 4460 KB Output is correct
39 Correct 48 ms 5288 KB Output is correct
40 Correct 50 ms 5468 KB Output is correct
41 Correct 82 ms 5432 KB Output is correct
42 Correct 53 ms 6648 KB Output is correct
43 Correct 66 ms 6632 KB Output is correct
44 Correct 109 ms 6632 KB Output is correct
45 Correct 73 ms 7864 KB Output is correct
46 Correct 69 ms 7936 KB Output is correct
47 Correct 140 ms 7904 KB Output is correct
48 Correct 93 ms 9296 KB Output is correct
49 Correct 105 ms 9288 KB Output is correct
50 Correct 154 ms 9516 KB Output is correct
51 Correct 114 ms 10892 KB Output is correct
52 Correct 115 ms 10892 KB Output is correct
53 Correct 172 ms 10804 KB Output is correct
54 Correct 127 ms 12600 KB Output is correct
55 Correct 145 ms 12492 KB Output is correct
56 Correct 222 ms 12628 KB Output is correct
57 Correct 160 ms 14364 KB Output is correct
58 Correct 150 ms 14280 KB Output is correct
59 Correct 276 ms 14476 KB Output is correct
60 Correct 182 ms 16160 KB Output is correct
61 Correct 169 ms 16212 KB Output is correct
62 Correct 314 ms 16288 KB Output is correct
63 Correct 297 ms 16152 KB Output is correct
64 Correct 414 ms 16244 KB Output is correct
65 Correct 346 ms 16224 KB Output is correct
66 Correct 307 ms 16188 KB Output is correct
67 Incorrect 273 ms 16196 KB Output isn't correct
68 Correct 226 ms 16276 KB Output is correct
69 Correct 201 ms 16520 KB Output is correct
70 Correct 197 ms 16292 KB Output is correct
71 Correct 199 ms 16192 KB Output is correct
72 Incorrect 190 ms 16444 KB Output isn't correct
73 Incorrect 263 ms 16280 KB Output isn't correct
74 Correct 216 ms 16396 KB Output is correct
75 Correct 248 ms 16232 KB Output is correct
76 Correct 220 ms 16204 KB Output is correct
77 Correct 228 ms 16396 KB Output is correct
78 Incorrect 251 ms 16208 KB Output isn't correct
79 Correct 209 ms 16188 KB Output is correct
80 Correct 220 ms 16248 KB Output is correct
81 Correct 266 ms 16176 KB Output is correct
82 Correct 219 ms 16200 KB Output is correct
83 Correct 268 ms 16220 KB Output is correct
84 Correct 263 ms 16368 KB Output is correct
85 Correct 244 ms 16224 KB Output is correct
86 Correct 269 ms 16228 KB Output is correct
87 Correct 267 ms 16284 KB Output is correct
88 Correct 286 ms 16228 KB Output is correct
89 Correct 264 ms 16368 KB Output is correct
90 Correct 280 ms 16188 KB Output is correct
91 Correct 264 ms 16200 KB Output is correct
92 Correct 279 ms 16200 KB Output is correct