oj.uz

Submission #571017

# Submission time Handle Problem Language Result Execution time Memory
571017 2022-06-01T04:33:38 Z f4t4nt Mecho (IOI09_mecho) C++11
84 / 100
 417 ms 16436 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 = 0, 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;
    }
    lo--;
    if(valid(lo, n, s, d_b, g, bfs_m, d_m)) cout << lo << '\n';
    else cout << -1 << '\n';
    return 0;
}

Subtask #1
84.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 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 312 ms 16192 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 1 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 Correct 1 ms 340 KB Output is 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 2 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 2 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 1 ms 340 KB Output is correct
31 Correct 1 ms 340 KB Output is correct
32 Correct 1 ms 340 KB Output is correct
33 Correct 28 ms 3340 KB Output is correct
34 Correct 28 ms 3560 KB Output is correct
35 Correct 55 ms 3544 KB Output is correct
36 Correct 51 ms 4484 KB Output is correct
37 Correct 41 ms 4264 KB Output is correct
38 Correct 61 ms 4280 KB Output is correct
39 Correct 52 ms 5264 KB Output is correct
40 Correct 55 ms 5284 KB Output is correct
41 Correct 130 ms 5476 KB Output is correct
42 Correct 83 ms 6588 KB Output is correct
43 Correct 62 ms 6592 KB Output is correct
44 Correct 111 ms 6676 KB Output is correct
45 Correct 79 ms 8028 KB Output is correct
46 Correct 89 ms 8008 KB Output is correct
47 Correct 165 ms 7956 KB Output is correct
48 Correct 86 ms 9272 KB Output is correct
49 Correct 90 ms 9280 KB Output is correct
50 Correct 189 ms 9484 KB Output is correct
51 Correct 131 ms 10852 KB Output is correct
52 Correct 107 ms 10932 KB Output is correct
53 Correct 202 ms 10876 KB Output is correct
54 Correct 128 ms 12536 KB Output is correct
55 Correct 130 ms 12444 KB Output is correct
56 Correct 244 ms 12496 KB Output is correct
57 Correct 160 ms 14296 KB Output is correct
58 Correct 151 ms 14356 KB Output is correct
59 Correct 306 ms 14304 KB Output is correct
60 Correct 180 ms 16168 KB Output is correct
61 Correct 180 ms 16156 KB Output is correct
62 Correct 364 ms 16408 KB Output is correct
63 Correct 334 ms 16228 KB Output is correct
64 Correct 417 ms 16216 KB Output is correct
65 Correct 382 ms 16284 KB Output is correct
66 Correct 336 ms 16156 KB Output is correct
67 Correct 297 ms 16160 KB Output is correct
68 Correct 234 ms 16380 KB Output is correct
69 Correct 225 ms 16192 KB Output is correct
70 Correct 205 ms 16236 KB Output is correct
71 Correct 226 ms 16268 KB Output is correct
72 Incorrect 202 ms 16400 KB Output isn't correct
73 Incorrect 203 ms 16268 KB Output isn't correct
74 Correct 245 ms 16424 KB Output is correct
75 Correct 278 ms 16372 KB Output is correct
76 Correct 232 ms 16436 KB Output is correct
77 Correct 258 ms 16164 KB Output is correct
78 Correct 291 ms 16204 KB Output is correct
79 Correct 233 ms 16284 KB Output is correct
80 Correct 291 ms 16232 KB Output is correct
81 Correct 240 ms 16280 KB Output is correct
82 Correct 319 ms 16192 KB Output is correct
83 Correct 282 ms 16352 KB Output is correct
84 Correct 308 ms 16252 KB Output is correct
85 Correct 271 ms 16372 KB Output is correct
86 Correct 274 ms 16216 KB Output is correct
87 Correct 263 ms 16200 KB Output is correct
88 Correct 306 ms 16316 KB Output is correct
89 Correct 274 ms 16304 KB Output is correct
90 Correct 326 ms 16240 KB Output is correct
91 Correct 317 ms 16180 KB Output is correct
92 Correct 291 ms 16228 KB Output is correct