oj.uz

Submission #1084605

# Submission time Handle Problem Language Result Execution time Memory
1084605 2024-09-06T13:36:07 Z kiethm07 Mecho (IOI09_mecho) C++11
4 / 100
 708 ms 12024 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;
    if (f[M.fi][M.se] != -1) return 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] + 1) 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(2) << "\n";
//    for (int i = 1; i <= n; i++){
//        for (int j = 1; j <= n; j++){
//            cout << f[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: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".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
mecho.cpp:106:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  106 |         freopen(TEXT".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
4.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 5980 KB Output isn't correct
2 Incorrect 4 ms 5980 KB Output isn't correct
3 Incorrect 4 ms 5980 KB Output isn't correct
4 Incorrect 4 ms 5980 KB Output isn't correct
5 Incorrect 4 ms 5980 KB Output isn't correct
6 Incorrect 4 ms 5980 KB Output isn't correct
7 Incorrect 602 ms 12024 KB Output isn't correct
8 Correct 5 ms 5976 KB Output is correct
9 Incorrect 5 ms 5976 KB Output isn't correct
10 Incorrect 5 ms 5844 KB Output isn't correct
11 Incorrect 5 ms 5980 KB Output isn't correct
12 Incorrect 6 ms 5468 KB Output isn't correct
13 Incorrect 7 ms 5596 KB Output isn't correct
14 Correct 8 ms 5980 KB Output is correct
15 Incorrect 5 ms 5980 KB Output isn't correct
16 Incorrect 5 ms 5980 KB Output isn't correct
17 Incorrect 5 ms 5988 KB Output isn't correct
18 Incorrect 5 ms 5980 KB Output isn't correct
19 Incorrect 5 ms 5468 KB Output isn't correct
20 Incorrect 6 ms 5984 KB Output isn't correct
21 Incorrect 5 ms 5980 KB Output isn't correct
22 Incorrect 7 ms 5980 KB Output isn't correct
23 Incorrect 5 ms 5984 KB Output isn't correct
24 Incorrect 5 ms 5980 KB Output isn't correct
25 Incorrect 6 ms 5984 KB Output isn't correct
26 Incorrect 6 ms 5980 KB Output isn't correct
27 Incorrect 6 ms 6068 KB Output isn't correct
28 Incorrect 6 ms 5984 KB Output isn't correct
29 Incorrect 7 ms 5988 KB Output isn't correct
30 Incorrect 6 ms 5984 KB Output isn't correct
31 Incorrect 7 ms 5472 KB Output isn't correct
32 Incorrect 7 ms 5980 KB Output isn't correct
33 Incorrect 51 ms 6800 KB Output isn't correct
34 Incorrect 55 ms 6784 KB Output isn't correct
35 Incorrect 81 ms 7020 KB Output isn't correct
36 Incorrect 65 ms 6984 KB Output isn't correct
37 Incorrect 64 ms 6980 KB Output isn't correct
38 Incorrect 104 ms 7312 KB Output isn't correct
39 Incorrect 89 ms 7196 KB Output isn't correct
40 Incorrect 77 ms 7204 KB Output isn't correct
41 Incorrect 132 ms 7604 KB Output isn't correct
42 Incorrect 98 ms 7392 KB Output isn't correct
43 Incorrect 94 ms 7424 KB Output isn't correct
44 Incorrect 163 ms 7960 KB Output isn't correct
45 Incorrect 117 ms 7688 KB Output isn't correct
46 Incorrect 113 ms 7684 KB Output isn't correct
47 Incorrect 200 ms 8308 KB Output isn't correct
48 Incorrect 136 ms 7984 KB Output isn't correct
49 Incorrect 135 ms 7972 KB Output isn't correct
50 Incorrect 226 ms 8740 KB Output isn't correct
51 Incorrect 156 ms 8300 KB Output isn't correct
52 Incorrect 155 ms 8308 KB Output isn't correct
53 Incorrect 262 ms 9172 KB Output isn't correct
54 Incorrect 183 ms 8620 KB Output isn't correct
55 Incorrect 176 ms 8820 KB Output isn't correct
56 Incorrect 303 ms 9632 KB Output isn't correct
57 Incorrect 260 ms 9028 KB Output isn't correct
58 Incorrect 207 ms 8928 KB Output isn't correct
59 Incorrect 361 ms 10180 KB Output isn't correct
60 Incorrect 230 ms 9396 KB Output isn't correct
61 Incorrect 243 ms 9392 KB Output isn't correct
62 Incorrect 404 ms 10708 KB Output isn't correct
63 Incorrect 605 ms 9892 KB Output isn't correct
64 Incorrect 577 ms 9896 KB Output isn't correct
65 Incorrect 586 ms 9900 KB Output isn't correct
66 Incorrect 604 ms 9888 KB Output isn't correct
67 Correct 587 ms 9896 KB Output is correct
68 Incorrect 708 ms 9916 KB Output isn't correct
69 Incorrect 707 ms 9904 KB Output isn't correct
70 Incorrect 705 ms 9924 KB Output isn't correct
71 Incorrect 688 ms 9904 KB Output isn't correct
72 Incorrect 683 ms 9900 KB Output isn't correct
73 Incorrect 648 ms 11908 KB Output isn't correct
74 Incorrect 618 ms 11972 KB Output isn't correct
75 Incorrect 625 ms 11984 KB Output isn't correct
76 Incorrect 640 ms 11992 KB Output isn't correct
77 Incorrect 634 ms 11968 KB Output isn't correct
78 Correct 593 ms 11968 KB Output is correct
79 Incorrect 596 ms 12008 KB Output isn't correct
80 Incorrect 601 ms 11984 KB Output isn't correct
81 Incorrect 608 ms 11976 KB Output isn't correct
82 Incorrect 594 ms 11968 KB Output isn't correct
83 Incorrect 601 ms 11876 KB Output isn't correct
84 Incorrect 614 ms 11940 KB Output isn't correct
85 Incorrect 610 ms 11876 KB Output isn't correct
86 Incorrect 594 ms 11932 KB Output isn't correct
87 Incorrect 612 ms 11948 KB Output isn't correct
88 Incorrect 596 ms 11964 KB Output isn't correct
89 Incorrect 599 ms 11972 KB Output isn't correct
90 Incorrect 610 ms 11968 KB Output isn't correct
91 Incorrect 612 ms 11976 KB Output isn't correct
92 Incorrect 619 ms 11968 KB Output isn't correct