oj.uz

Submission #717452

# Submission time Handle Problem Language Result Execution time Memory
717452 2023-04-02T00:03:28 Z Joshua_Andersson Portals (BOI14_portals) C++14
70 / 100
 1000 ms 121780 KB 
#undef _GLIBCXX_DEBUG                // disable run-time bound checking, etc
#pragma GCC optimize("Ofast,inline") // Ofast = O3,fast-math,allow-store-data-races,no-protect-parens
#pragma GCC optimize ("unroll-loops")

#pragma GCC target("bmi,bmi2,lzcnt,popcnt")                      // bit manipulation
#pragma GCC target("movbe")                                      // byte swap
#pragma GCC target("aes,pclmul,rdrnd")                           // encryption
#pragma GCC target("avx,avx2,f16c,fma,sse3,ssse3,sse4.1,sse4.2") // SIMD

#include <bits/stdc++.h>
#include <bits/extc++.h>
using namespace std;

#define enablell 1

typedef long long ll;
typedef unsigned long long ull;
#if enablell
#define int ll
#define inf int(1e18)
#define float double
#else
const int inf = int(2e9);
#endif
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<vvi> vvvi;
typedef vector<vvvi> vvvvi;
typedef vector<bool> vb;
typedef vector<vb> vvb;
typedef vector<vvb> vvvb;
typedef pair<int, int> p2;
typedef vector<p2> vp2;
typedef vector<vp2> vvp2;
typedef vector<vvp2> vvvp2;
typedef tuple<int, int, int> p3;
typedef vector<p3> vp3;
typedef vector<vp3> vvp3;
typedef vector<vvp3> vvvp3;
typedef tuple<int, int, int, int> p4;
typedef vector<p4> vp4;

#define PBDS 0
#define _LOCAL _MSC_VER > 0
#if _LOCAL
#define gc() getchar()
#define popcount(x) __popcnt(x)
#define leading_zeros(x) _lzcnt_u32(x)
uint32_t clz(uint32_t x) { return _lzcnt_u32(x); }
uint32_t ctz(uint32_t x) { return _tzcnt_u32(x); }
#define bswap64(x) _byteswap_uint64(x)
#define assert(x) debassert(x)
#else
#define popcount(x) __builtin_popcount(x)
uint32_t clz(uint32_t x) { return __builtin_clz(x); }
uint32_t ctz(uint32_t x) { return __builtin_ctzll(x); }
#define bswap64(x) __builtin_bswap64(x)
#define gc() getchar_unlocked()
#if PBDS
using namespace __gnu_pbds;
// lower_bound is now upper_bound and vice versa (multiset). generally a bit broken
template<typename T> using indexed_multiset = tree<int, null_type, less_equal<T>, rb_tree_tag, tree_order_statistics_node_update>;
template<typename T> using indexed_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
struct chash { // large odd number for C
    const uint64_t C = ll(4e18 * acos(0)) | 71;
    ll operator()(ll x) const { return __builtin_bswap64(x * C); }
};

template<typename T, typename U> using fast_map = __gnu_pbds::gp_hash_table<T, U, chash>;
template<typename T> using fast_set = __gnu_pbds::gp_hash_table<T, null_type, chash>;
template<typename T, typename H> using fast_set_h = __gnu_pbds::gp_hash_table<T, null_type, H>;
#endif

#endif

#define FAST_INPUT 0
#define FILE_TC 0
#if FILE_TC && _LOCAL
ifstream filein("E:\\desktop\\code\\repos\\Comp prog\\x64\\Debug\\in.txt");
//ifstream filein("E:\\downloads\\test_data\\test_data\\005-case05.in");
//ifstream filein("E:\\desktop\\po-repos\\swedish-olympiad-2023\\online\\tomtplanering\\data\\secret\\group10\\010-case10.in");

#define cin filein
//ifstream cin("C:\\Users\\Matis\\desktop\\po-two\\swedish-olympiad-2014\\");
void fast() {}
#else
inline void fast() { ios::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL); }
#endif

#if FAST_INPUT && !FILE_TC
inline void read(int& v) { v = 0; int sign = 1; char c = gc(); if (c == '-') { sign = -1; } else { v += c - '0'; } while ((c = gc()) != EOF && c != ' ' && c != '\n') { v *= 10; v += c - '0'; } v *= sign; }
inline void read(int& u, int& v) { read(u); read(v); }
inline void read(int& u, int& v, int& k) { read(u); read(v); read(k); }
//inline void read(int& v) { char c; while ((c = getchar()) != EOF && c != ' ' && c != '\n') { v *= 10; v += c - '0'; } }
inline void read(string& s) { char c; while ((c = gc()) != EOF && c != '\n' && c != ' ') { s.push_back(c); } }
#else
template <typename T> inline void read(T& a) { cin >> a; }
template <typename T> inline void read(T& a, T& b) { cin >> a >> b; }
template <typename T> inline void read(T& a, T& b, T& c) { cin >> a >> b >> c; }
#endif
template <typename T> inline void write(T a) { cout << (a) << "\n"; }
#define quit cout << endl; _Exit(0);
#define dread(type, a) type a; read(a)
#define dread2(type, a, b) dread(type, a); dread(type, b)
#define dread3(type, a, b, c) dread2(type, a, b); dread(type, c)
#define dread4(type, a, b, c, d) dread3(type, a, b, c); dread(type, d)
#define dread5(type, a, b, c, d, e) dread4(type, a, b, c, d); dread(type, e)
#define readvector(type, name, size) vector<type> name(size); rep(i,size) {dread(type,temp); name[i]=temp;}
#ifdef _DEBUG
#define noop cout << "";
#define deb __debugbreak();
#define debassert(expr) if (!(expr)) deb;
#define debif(expr) if(expr) deb;
#else
#define noop ;
#define deb ;
#define debassert(expr) ;
#define debif(expr) ;
#endif

#define rep(i, high) for (int i = 0; i < high; i++)
#define repp(i, low, high) for (int i = low; i < high; i++)
#define repe(i, container) for (auto& i : container)
#define per(i, high) for (int i = high-1; i >= 0; i--)
#define perr(i, low, high) for (int i = high-1; i >= low; i--)

#define all(a) a.begin(),a.end()
#define rall(a) a.rbegin(),a.rend()
#define setcontains(set, x) (set.find(x) != set.end())
#define within(a, b, c, d) (a >= 0 && a < b && c >= 0 && c < d)
#define sz(container) ((int)container.size())
#define mp(a,b) (make_pair(a,b))

#define ceildiv(x,y) ((x + y - 1) / y)

template<typename T> inline void eraseOne(multiset<T>& mSet, T k) { auto itr = mSet.find(k); if (itr != mSet.end()) { mSet.erase(itr); } }
template<typename T, typename U> inline T first(U& a) { return *begin(a); }
template <typename T, typename U> inline void operator+=(pair<T, U>& l, const pair<T, U>& r) { l = { l.first + r.first,l.second + r.second }; }
template <typename T, typename U> inline pair<T, U> operator+(const pair<T, U> l, const pair<T, U> r) { return { l.first + r.first, l.second + r.second }; }
template <typename T, typename U> inline pair<T, U> operator-(const pair<T, U> l, const pair<T, U> r) { return { l.first - r.first, l.second - r.second }; }
template <typename T, typename U> inline pair<T, U> operator*(const pair<T, U> l, const int m) { return { l.first * m, l.second * m }; }
template <typename Out> inline void split(const string& s, char delim, Out result) { istringstream iss(s); string item; while (getline(iss, item, delim)) { *result++ = item; } }
inline vector<string> split(const string& s, char delim) { vector<string> elems; split(s, delim, back_inserter(elems)); return elems; }
vector<string> split(string s, string d) { size_t k = 0, n, e = d.length(); string t; vector<string> r; while ((n = s.find(d, k)) != string::npos) { t = s.substr(k, n - k); k = n + e; r.push_back(t); } r.push_back(s.substr(k)); return r; }
ll binpow(ll a, ll b) { ll res = 1; while (b > 0) { if (b & 1) res = res * a; a = a * a; b >>= 1; } return res; }
ll binpow(ll a, ll b, ll m) { a %= m; long long res = 1; while (b > 0) { if (b & 1) res = res * a % m; a = a * a % m; b >>= 1; } return res; } // For a < 2^31

#if 1
auto Start = chrono::high_resolution_clock::now();
void resettimer() { Start = chrono::high_resolution_clock::now(); }
int elapsedmillis() { return chrono::duration_cast<chrono::milliseconds>(chrono::high_resolution_clock::now() - Start).count(); }
random_device rd;
mt19937 rng(rd());
template<typename T> inline T randint(T lo, T hi) { return uniform_int_distribution<T>(lo, hi)(rng); } // [lo,hi]
template<typename T> inline T randel(vector<T>& v) { return v[uniform_int_distribution<T>((int)0, v.size() - 1)(rng)]; } // [lo,hi]
#endif
const ll mod = 1e9 + 7;
vp2 dirs = { {0,1},{0,-1},{1,0},{-1,0} };

p2 getwall (p2 p, int dir, vector<string>& grid, vvvp2& dp)
{
    if (grid[p.first][p.second] == '#') return p - dirs[dir];
    if (dp[p.first][p.second][dir].second != -1) return dp[p.first][p.second][dir];
    return dp[p.first][p.second][dir] = getwall(p + dirs[dir], dir, grid, dp);
}

int32_t main()
{
    fast();

    dread2(int, r, c);
    r += 2;
    c += 2;
    vector<string> grid;
    grid.reserve(r+2);
    grid.push_back(string(c, '#'));
    p2 start;
    p2 goal;

    rep(i, r-2)
    {
        dread(string, row);
        row.insert(row.begin(), '#');
        row.push_back('#');

        rep(j, c)
        {
            if (row[j]=='S')
            {
                row[j] = '.';
                start = { i+1,j };
            }
            else if (row[j]=='C')
            {
                row[j] = '.';
                goal = { i+1,j };
            }
        }
        grid.push_back(row);
    }
    grid.push_back(string(c, '#'));


    queue<p3> q;
    vvi walldist(r, vi(c, inf));
    rep(i, r)
    {
        rep(j, c)
        {
            repe(dir, dirs)
            {
                p2 p = p2(i,j) + dir;
                if (p.first < 0 || p.first >= r || p.second < 0 || p.second >= c) continue;
                if (grid[p.first][p.second] == '#' && grid[i][j]=='.')
                {
                    q.emplace(i, j, 0);
                }
            }
            
        }
    }
    
    while (q.size())
    {
        int i, j,d;
        tie(i, j,d) = q.front();
        q.pop();

        if (walldist[i][j] != inf) continue;
        walldist[i][j] = d;

        repe(dir, dirs)
        {
            p2 np = p2(i, j) + dir;
            if (np.first < 0 || np.first >= r || np.second < 0 || np.second >= c) continue;
            if (grid[np.first][np.second] == '#') continue;
            q.emplace(np.first, np.second, d + 1);
        }
    }

    priority_queue<p3> pq;
    pq.emplace(0, start.first, start.second);
    vvi dist(r, vi(c, inf));

    vvvp2 dp(r, vvp2(c, vp2(4, p2(-1,-1))));

    while (pq.size())
    {
        int d, i, j;
        tie(d, i, j) = pq.top();
        pq.pop();

        if (p2(i,j)==goal)
        {
            cout << -d;
            quit;
        }

        if (dist[i][j] != inf) continue;
        dist[i][j] = d;

        repe(dir, dirs)
        {
            p2 np = p2(i, j) + dir;
            if (np.first < 0 || np.first >= r || np.second < 0 || np.second >= c) continue;

            if (grid[np.first][np.second] == '#') continue;
            pq.emplace(d-1, np.first, np.second);
        }

        rep(dir, dirs.size())
        {
            p2 np = getwall(p2(i,j),dir,grid,dp);

            pq.emplace(d-walldist[i][j]-1, np.first, np.second);
        }
    }

    quit;
}

Compilation message

portals.cpp: In function 'int32_t main()':
portals.cpp:121:40: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  121 | #define rep(i, high) for (int i = 0; i < high; i++)
......
  271 |         rep(dir, dirs.size())
      |             ~~~~~~~~~~~~~~~~            
portals.cpp:271:9: note: in expansion of macro 'rep'
  271 |         rep(dir, dirs.size())
      |         ^~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 212 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 4 ms 920 KB Output is correct
10 Correct 2 ms 916 KB Output is correct
11 Correct 2 ms 596 KB Output is correct
12 Correct 3 ms 596 KB Output is correct
13 Correct 2 ms 596 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 724 KB Output is correct
16 Correct 1 ms 340 KB Output is correct

Subtask #3
20.0 / 20.0

# 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 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 23 ms 5248 KB Output is correct
6 Correct 31 ms 5320 KB Output is correct
7 Correct 27 ms 5328 KB Output is correct
8 Correct 12 ms 5204 KB Output is correct

Subtask #4
19.0 / 19.0

# 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 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 3 ms 920 KB Output is correct
10 Correct 2 ms 916 KB Output is correct
11 Correct 2 ms 596 KB Output is correct
12 Correct 2 ms 596 KB Output is correct
13 Correct 2 ms 596 KB Output is correct
14 Correct 23 ms 5252 KB Output is correct
15 Correct 29 ms 5304 KB Output is correct
16 Correct 23 ms 5336 KB Output is correct
17 Correct 29 ms 5336 KB Output is correct
18 Correct 36 ms 5792 KB Output is correct
19 Correct 8 ms 5528 KB Output is correct
20 Correct 26 ms 8400 KB Output is correct
21 Correct 23 ms 5204 KB Output is correct
22 Correct 24 ms 5168 KB Output is correct
23 Correct 27 ms 5324 KB Output is correct
24 Correct 70 ms 6812 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 2 ms 724 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 12 ms 5204 KB Output is correct

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 4 ms 920 KB Output is correct
10 Correct 3 ms 980 KB Output is correct
11 Correct 2 ms 604 KB Output is correct
12 Correct 2 ms 596 KB Output is correct
13 Correct 2 ms 724 KB Output is correct
14 Correct 23 ms 5164 KB Output is correct
15 Correct 29 ms 5320 KB Output is correct
16 Correct 22 ms 5332 KB Output is correct
17 Correct 29 ms 5324 KB Output is correct
18 Correct 38 ms 5680 KB Output is correct
19 Correct 8 ms 5500 KB Output is correct
20 Correct 27 ms 8424 KB Output is correct
21 Correct 22 ms 5204 KB Output is correct
22 Correct 23 ms 5204 KB Output is correct
23 Correct 27 ms 5324 KB Output is correct
24 Execution timed out 1051 ms 121780 KB Time limit exceeded
25 Halted 0 ms 0 KB -