oj.uz

Submission #533467

# Submission time Handle Problem Language Result Execution time Memory
533467 2022-03-06T06:05:49 Z Stro256 Mecho (IOI09_mecho) C++14
84 / 100
 176 ms 7024 KB 
#include<bits/stdc++.h>
using namespace std;

#define FOR(i,a,b) for(int i = (a) ; i<(b) ; i++)
#define F0R(i,a) FOR(i,0,a)
#define ROF(i,a,b) for(int i = (b)-1 ; i>=(a) ; i--)
#define R0F(i,a) ROF(i,0,a)
#define REP(a) F0R(_,a)
#define each(e,a) for(auto &e : (a))
#define sz(v) (int)(v).size()
#define all(v) (v).begin(),(v).end()
#define rall(v) (v).rbegin(),(v).rend()
#define rsz resize
#define pb push_back
#define f first
#define s second
#define pf push_front
#define ft front()
#define bk back()
#define eb emplace_back
#define lb lower_bound
#define ub upper_bound
#define tcT template<class T
#define tcTU tcT, class U
#define nl "\n"

using ll = long long;
using vi = vector<int>;
using vl = vector<ll>;
using vb = vector<bool>;
using pi = pair<int,int>;
using vpi = vector<pi>;
using str = string;
using vs = vector<str>;
using db = long double;
using pl = pair<ll,ll>;
using pd = pair<db,db>;
tcT> using V = vector<T>;
tcT> using pqg = priority_queue<T,vector<T>,greater<T>>;
tcTU> using PR = pair<T,U>;

const int MOD = 1e9+7;
const ll INF = 1e18;
const int dx[] = {-1,0,1,0}, dy[] = {0,-1,0,1};

constexpr int bits(int x) { return x == 0 ? 0 : 31 - __builtin_clz(x); }
constexpr bool onbit(int msk, int i) { return msk>>i&1; }
constexpr ll p2(int x) { return 1LL<<x; }
constexpr int pct(int x) { return __builtin_popcount(x); }
constexpr int lg2(int x) { return x == 0 ? 0 : 31 - __builtin_clz(x); }; //int only

tcT> bool ckmin(T&a, const T&b) { return b < a ? a = b,1 : 0; }
tcT> bool ckmax(T&a, const T&b) { return b > a ? a = b,1 : 0; }

ll cdiv(ll a, ll b) { return a/b+((a^b)>0&&a%b); }
ll fdiv(ll a, ll b) { return a/b-((a^b)<0&&a%b); }

tcTU> T fstTrue(T lo, T hi, U f) {
    hi++; assert(lo <= hi);
    while (lo < hi) {
        T mid = lo+(hi-lo)/2;
        f(mid) ? hi = mid : lo = mid+1;
    }
    return lo;
}
tcTU> T lstTrue(T lo, T hi, U f) {
    lo--; assert(lo <= hi);
    while (lo < hi) {
        T mid = lo+(hi-lo+1)/2;
        f(mid) ? lo = mid : hi = mid-1;
    }
    return lo;
}

tcT> void remDup(V<T> &v) {
    sort(all(v)); v.erase(unique(all(v)), end(v)); }
void DBG() { cerr << "]\n"; }
template<class H, class... T> void DBG(H h, T... t) {
    cerr << h; if(sizeof...(t)) cerr << ", ";
    DBG(t...);
}
#ifdef LOCAL
#define dbg(...) cerr << "LINE(" << __LINE__ << ") -> [" << #__VA_ARGS__ << "]: [", DBG(__VA_ARGS__)
#else
#define dbg(...) 0
#endif // LOCAL

void setPrec() { cout << fixed << setprecision(16); }
void setIO(string NAME = "") {
    cin.tie(0)->sync_with_stdio(0);
    setPrec();
    if(sz(NAME)) {
        freopen((NAME + ".inp").c_str(),"r",stdin);
        freopen((NAME + ".out").c_str(),"w",stdout);
    }
}

const int MX = 805;
int N, S, si, sj, ei, ej;
str g[MX];
int d[MX][MX], d1[MX][MX];

bool isInside(int x, int y)  {
    return min(x,y)>=0 && max(x,y)<N;
}

void bfs(int dis[MX][MX], int st) {
    queue<pi> q;
    F0R(i,N) F0R(j,N) if(!dis[i][j]) q.push({i,j});
    while(!q.empty()) {
        int x = q.ft.f, y = q.ft.s; q.pop();
        if(st>=0 && dis[x][y]/S + st >= d1[x][y]) continue;
        F0R(i,4) {
            int nx = x + dx[i], ny = y + dy[i];
            if(isInside(nx, ny) && (g[nx][ny]!='T') && (st>=0 || g[nx][ny] != 'D') && dis[nx][ny]>=MOD) {
                q.push({nx, ny});
                dis[nx][ny] = dis[x][y] + 1;
            }
        }
    }
}

void solve() {
    cin>>N>>S;
    F0R(i,N) cin>>g[i];
    memset(d1, 0x3f, sizeof d1);
    F0R(i,N) F0R(j,N) {
        if(g[i][j] == 'M') {
            si = i, sj = j;
        }
        else if(g[i][j] == 'H') {
            d1[i][j] = 0;
        }
        else if(g[i][j] == 'D') {
            ei = i, ej = j;
        }
    }
    bfs(d1, -1);
    int lo = 0, hi = N*N+1;
    while(lo<hi) {
        int mid = lo + (hi-lo+1)/2;
        memset(d, 0x3f, sizeof d);
        d[si][sj] = 0;
        bfs(d, mid);
        if(d[ei][ej] < MOD) lo = mid;
        else hi = mid-1;
    }
    cout << lo << nl;
}

int main() {
    setIO();

    int t=1;
    //cin>>t;
    while(t-->0) {
        solve();
    }

    return 0;
}

Compilation message

mecho.cpp: In function 'void setIO(std::string)':
mecho.cpp:93:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   93 |         freopen((NAME + ".inp").c_str(),"r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
mecho.cpp:94:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   94 |         freopen((NAME + ".out").c_str(),"w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
84.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5324 KB Output is correct
2 Correct 4 ms 5324 KB Output is correct
3 Correct 3 ms 5324 KB Output is correct
4 Correct 3 ms 5324 KB Output is correct
5 Correct 4 ms 5340 KB Output is correct
6 Correct 3 ms 5328 KB Output is correct
7 Correct 124 ms 6708 KB Output is correct
8 Incorrect 3 ms 5324 KB Output isn't correct
9 Correct 5 ms 5324 KB Output is correct
10 Correct 3 ms 5324 KB Output is correct
11 Correct 3 ms 5332 KB Output is correct
12 Correct 3 ms 5336 KB Output is correct
13 Correct 3 ms 5332 KB Output is correct
14 Incorrect 4 ms 5332 KB Output isn't correct
15 Correct 3 ms 5332 KB Output is correct
16 Correct 3 ms 5324 KB Output is correct
17 Correct 3 ms 5324 KB Output is correct
18 Correct 3 ms 5324 KB Output is correct
19 Correct 3 ms 5324 KB Output is correct
20 Correct 3 ms 5324 KB Output is correct
21 Correct 3 ms 5324 KB Output is correct
22 Correct 3 ms 5324 KB Output is correct
23 Correct 3 ms 5324 KB Output is correct
24 Correct 4 ms 5452 KB Output is correct
25 Correct 3 ms 5332 KB Output is correct
26 Correct 3 ms 5324 KB Output is correct
27 Correct 3 ms 5324 KB Output is correct
28 Correct 3 ms 5324 KB Output is correct
29 Correct 5 ms 5324 KB Output is correct
30 Correct 4 ms 5324 KB Output is correct
31 Correct 4 ms 5324 KB Output is correct
32 Correct 5 ms 5428 KB Output is correct
33 Correct 7 ms 5580 KB Output is correct
34 Correct 7 ms 5580 KB Output is correct
35 Correct 21 ms 5584 KB Output is correct
36 Correct 8 ms 5656 KB Output is correct
37 Correct 8 ms 5596 KB Output is correct
38 Correct 26 ms 5708 KB Output is correct
39 Correct 9 ms 5764 KB Output is correct
40 Correct 10 ms 5724 KB Output is correct
41 Correct 48 ms 5808 KB Output is correct
42 Correct 15 ms 5856 KB Output is correct
43 Correct 12 ms 5924 KB Output is correct
44 Correct 44 ms 5900 KB Output is correct
45 Correct 12 ms 5964 KB Output is correct
46 Correct 13 ms 5984 KB Output is correct
47 Correct 57 ms 5936 KB Output is correct
48 Correct 13 ms 6056 KB Output is correct
49 Correct 15 ms 6104 KB Output is correct
50 Correct 69 ms 6044 KB Output is correct
51 Correct 15 ms 6244 KB Output is correct
52 Correct 26 ms 6272 KB Output is correct
53 Correct 74 ms 6220 KB Output is correct
54 Correct 17 ms 6340 KB Output is correct
55 Correct 18 ms 6348 KB Output is correct
56 Correct 81 ms 6364 KB Output is correct
57 Correct 21 ms 6468 KB Output is correct
58 Correct 22 ms 6500 KB Output is correct
59 Correct 107 ms 6576 KB Output is correct
60 Correct 21 ms 6596 KB Output is correct
61 Correct 22 ms 6604 KB Output is correct
62 Correct 170 ms 6828 KB Output is correct
63 Correct 90 ms 6612 KB Output is correct
64 Correct 176 ms 6688 KB Output is correct
65 Correct 144 ms 6600 KB Output is correct
66 Correct 120 ms 6688 KB Output is correct
67 Incorrect 106 ms 6700 KB Output isn't correct
68 Correct 49 ms 6624 KB Output is correct
69 Correct 44 ms 6620 KB Output is correct
70 Correct 46 ms 6620 KB Output is correct
71 Correct 48 ms 6628 KB Output is correct
72 Correct 29 ms 6596 KB Output is correct
73 Correct 32 ms 6972 KB Output is correct
74 Correct 50 ms 7024 KB Output is correct
75 Correct 81 ms 6876 KB Output is correct
76 Correct 61 ms 6852 KB Output is correct
77 Correct 65 ms 6884 KB Output is correct
78 Incorrect 65 ms 6940 KB Output isn't correct
79 Correct 55 ms 6940 KB Output is correct
80 Correct 51 ms 6864 KB Output is correct
81 Correct 65 ms 6976 KB Output is correct
82 Correct 58 ms 6944 KB Output is correct
83 Correct 69 ms 6852 KB Output is correct
84 Correct 72 ms 6904 KB Output is correct
85 Correct 95 ms 6908 KB Output is correct
86 Correct 94 ms 6852 KB Output is correct
87 Correct 68 ms 6812 KB Output is correct
88 Correct 73 ms 6852 KB Output is correct
89 Correct 93 ms 6760 KB Output is correct
90 Correct 111 ms 6856 KB Output is correct
91 Correct 70 ms 6880 KB Output is correct
92 Correct 74 ms 6848 KB Output is correct