oj.uz

Submission #1084581

# Submission time Handle Problem Language Result Execution time Memory
1084581 2024-09-06T12:16:58 Z kiethm07 Mecho (IOI09_mecho) C++11
38 / 100
 799 ms 12204 KB 
#include <bits/stdc++.h>

#define pii pair<int,int>
#define iii pair<int,pii>
#define fi first
#define se second

#define vi vector<int>
#define vii vector<pii>
#define pb(i) push_back(i)
#define all(x) x.begin(),x.end()

#define TEXT "a"

using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;

const int inf = 1e9 + 7;
const ld eps = 1e-8;
const double pi = acos(-1);
const int N = 805;

int n,s;
int f[N][N], g[N][N];
char a[N][N];
int dx[4] = {0,0,1,-1};
int dy[4] = {1,-1,0,0};

bool check(int val){
    queue<pii> q;
    memset(f,-1,sizeof(f));
    memset(g,-1,sizeof(g));
    pii M, D;
    for (int i = 1; i <= n; i++){
        for (int j = 1; j <= n; j++){
            if (a[i][j] == 'M') M = pii(i,j);
            if (a[i][j] == 'D') D = pii(i,j);
            if (a[i][j] == 'H'){
                q.push(pii(i,j));
                f[i][j] = 0;
            }
        }
    }
    while(!q.empty()){
        pii u = q.front();
        q.pop();
        if (f[u.fi][u.se] >= val) continue;
        for (int i = 0; i < 4; i++){
            int x = u.fi + dx[i];
            int y = u.se + dy[i];
            if (x == 0 || x > n || y == 0 || y > n) continue;
            if (a[x][y] == 'T' || a[x][y] == 'D') continue;
            if (f[x][y] != -1) continue;
            f[x][y] = f[u.fi][u.se] + 1;
            q.push(pii(x,y));
        }
    }
    for (int i = 1; i <= n; i++){
        for (int j = 1; j <= n; j++){
            if (f[i][j] == -1) continue;
            f[i][j] = 0;
            q.push(pii(i,j));
        }
    }
    while(!q.empty()){
        pii u = q.front();
        q.pop();
        for (int i = 0; i < 4; i++){
            int x = u.fi + dx[i];
            int y = u.se + dy[i];
            if (x == 0 || x > n || y == 0 || y > n) continue;
            if (a[x][y] == 'T' || a[x][y] == 'D') continue;
            if (f[x][y] != -1) continue;
            f[x][y] = f[u.fi][u.se] + s;
            q.push(pii(x,y));
        }
    }
    f[D.fi][D.se] = inf;
    g[M.fi][M.se] = 0;
    q.push(M);
    while(!q.empty()){
        pii u = q.front();
        q.pop();
        for (int i = 0; i < 4; i++){
            int x = u.fi + dx[i];
            int y = u.se + dy[i];
            if (x == 0 || x > n || y == 0 || y > n) continue;
            if (a[x][y] == 'T') continue;
            if (g[x][y] != -1) continue;
            if (f[x][y] <= g[u.fi][u.se]) continue;
            g[x][y] = g[u.fi][u.se] + 1;
            q.push(pii(x,y));
        }
    }
    return g[D.fi][D.se] != -1;
}

int main(){
    cin.tie(0) -> sync_with_stdio(0);
    if (fopen(TEXT".inp","r")){
        freopen(TEXT".inp","r",stdin);
        freopen(TEXT".out","w",stdout);
    }
    cin >> n >> s;
    for (int i = 1; i <= n; i++){
        for (int j = 1; j <= n; j++) cin >> a[i][j];
    }
    int res = -1;
    int l = 0;
    int r = inf;
//    cout << check(1) << "\n";
//    for (int i = 1; i <= n; i++){
//        for (int j = 1; j <= n; j++){
//            cout << g[i][j] << "   ";
//        }
//        cout << "\n";
//    }
    while(l <= r){
        int mid = (l + r) / 2;
        if (check(mid)){
            res = mid;
            l = mid + 1;
        }
        else r = mid - 1;
    }
    cout << res << "\n";
    return 0;
}

Compilation message

mecho.cpp: In function 'int main()':
mecho.cpp:104:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  104 |         freopen(TEXT".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
mecho.cpp:105:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  105 |         freopen(TEXT".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
38.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 6 ms 5468 KB Output isn't correct
2 Incorrect 7 ms 5468 KB Output isn't correct
3 Incorrect 5 ms 5468 KB Output isn't correct
4 Incorrect 5 ms 5468 KB Output isn't correct
5 Correct 5 ms 5464 KB Output is correct
6 Correct 5 ms 5468 KB Output is correct
7 Correct 721 ms 11996 KB Output is correct
8 Incorrect 7 ms 5464 KB Output isn't correct
9 Correct 6 ms 5468 KB Output is correct
10 Correct 6 ms 5468 KB Output is correct
11 Correct 6 ms 5528 KB Output is correct
12 Incorrect 8 ms 5468 KB Output isn't correct
13 Incorrect 8 ms 5468 KB Output isn't correct
14 Correct 9 ms 5464 KB Output is correct
15 Incorrect 6 ms 5464 KB Output isn't correct
16 Correct 5 ms 5464 KB Output is correct
17 Incorrect 6 ms 5468 KB Output isn't correct
18 Correct 6 ms 5468 KB Output is correct
19 Incorrect 6 ms 5468 KB Output isn't correct
20 Correct 6 ms 5344 KB Output is correct
21 Incorrect 6 ms 5468 KB Output isn't correct
22 Correct 6 ms 5572 KB Output is correct
23 Incorrect 6 ms 5592 KB Output isn't correct
24 Correct 6 ms 5468 KB Output is correct
25 Incorrect 7 ms 5584 KB Output isn't correct
26 Correct 7 ms 5468 KB Output is correct
27 Incorrect 8 ms 5468 KB Output isn't correct
28 Correct 8 ms 5468 KB Output is correct
29 Incorrect 9 ms 5624 KB Output isn't correct
30 Correct 8 ms 5468 KB Output is correct
31 Incorrect 8 ms 5464 KB Output isn't correct
32 Correct 11 ms 5468 KB Output is correct
33 Incorrect 83 ms 6452 KB Output isn't correct
34 Correct 68 ms 6444 KB Output is correct
35 Correct 101 ms 6700 KB Output is correct
36 Incorrect 86 ms 6644 KB Output isn't correct
37 Correct 95 ms 6644 KB Output is correct
38 Correct 123 ms 7000 KB Output is correct
39 Incorrect 107 ms 6896 KB Output isn't correct
40 Correct 105 ms 6896 KB Output is correct
41 Correct 148 ms 7276 KB Output is correct
42 Incorrect 133 ms 7164 KB Output isn't correct
43 Correct 131 ms 7164 KB Output is correct
44 Correct 187 ms 7956 KB Output is correct
45 Incorrect 158 ms 7452 KB Output isn't correct
46 Correct 147 ms 7480 KB Output is correct
47 Correct 225 ms 8120 KB Output is correct
48 Incorrect 185 ms 7784 KB Output isn't correct
49 Correct 177 ms 7804 KB Output is correct
50 Correct 277 ms 8560 KB Output is correct
51 Incorrect 218 ms 8184 KB Output isn't correct
52 Correct 224 ms 8192 KB Output is correct
53 Correct 321 ms 9048 KB Output is correct
54 Incorrect 267 ms 8596 KB Output isn't correct
55 Correct 249 ms 8556 KB Output is correct
56 Correct 366 ms 9560 KB Output is correct
57 Incorrect 302 ms 8916 KB Output isn't correct
58 Correct 269 ms 8964 KB Output is correct
59 Correct 422 ms 10080 KB Output is correct
60 Incorrect 345 ms 9388 KB Output isn't correct
61 Correct 324 ms 9408 KB Output is correct
62 Correct 456 ms 10724 KB Output is correct
63 Correct 670 ms 10144 KB Output is correct
64 Correct 706 ms 9888 KB Output is correct
65 Correct 743 ms 9892 KB Output is correct
66 Incorrect 682 ms 9912 KB Output isn't correct
67 Correct 659 ms 9912 KB Output is correct
68 Correct 732 ms 10160 KB Output is correct
69 Correct 728 ms 10004 KB Output is correct
70 Correct 727 ms 9900 KB Output is correct
71 Correct 721 ms 9904 KB Output is correct
72 Incorrect 799 ms 9904 KB Output isn't correct
73 Incorrect 670 ms 11908 KB Output isn't correct
74 Correct 705 ms 11956 KB Output is correct
75 Correct 701 ms 11972 KB Output is correct
76 Correct 710 ms 11976 KB Output is correct
77 Correct 708 ms 12204 KB Output is correct
78 Correct 629 ms 11980 KB Output is correct
79 Correct 693 ms 11976 KB Output is correct
80 Correct 665 ms 11972 KB Output is correct
81 Correct 678 ms 11968 KB Output is correct
82 Correct 696 ms 12136 KB Output is correct
83 Correct 638 ms 11888 KB Output is correct
84 Correct 742 ms 11976 KB Output is correct
85 Correct 679 ms 11960 KB Output is correct
86 Correct 680 ms 11952 KB Output is correct
87 Correct 684 ms 12044 KB Output is correct
88 Correct 708 ms 12176 KB Output is correct
89 Correct 709 ms 11996 KB Output is correct
90 Correct 660 ms 11972 KB Output is correct
91 Correct 680 ms 11964 KB Output is correct
92 Correct 639 ms 11976 KB Output is correct