oj.uz

Submission #651070

# Submission time Handle Problem Language Result Execution time Memory
651070 2022-10-16T23:59:31 Z dooompy Love Polygon (BOI18_polygon) C++17
100 / 100
 276 ms 24260 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>
    using namespace std;
     
    #define enablell 0
     
    typedef long long ll;
    #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 _LOCAL _MSC_VER > 0
    #if _LOCAL
    #define gc() getchar()
    #define popcount(x) __popcnt(x)
    #define leading_zeros(x) _lzcnt_u32(x)
    #define assert(x) debassert(x)
    #else
    #define popcount(x) __builtin__popcount(x)
    #define leading_zeros(x) __builtin_clz(x)
    #define gc() getchar_unlocked()
    #if 0
    #include <bits/extc++.h>
    using namespace __gnu_pbds;
    struct chash { // large odd number for C
        const uint64_t C = ll(4e18 * acos(0)) | 71;
        ll operator()(ll x) const { return x; }
    };
    //typedef __gnu_pbds::gp_hash_table<int, null_type, chash> h;
    #endif
     
    #endif
     
    #define FILE_TC 0
    #if FILE_TC
    ifstream filein("C:\\Users\\Matis\\source\\repos\\Comp prog\\x64\\Debug\\in.txt");
    #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 !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& 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 revall(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 first(a) (*begin(a))
    #define indexpair(p, i) ((i==0)?p.first:p.second)
    #define chmax(a,b) ((a)=max((a),b))
    #define chmin(a,b) ((a)=min((a),b))
     
    #define ceildiv(x,y) ((x + y - 1) / y)
    #define fract(a) (a-floor(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; }
     
    #if 0
    auto Start = chrono::high_resolution_clock::now();
    #define elapsedmillis() (chrono::duration_cast<chrono::milliseconds>(chrono::high_resolution_clock::now() - Start).count())
    #define rununtil(time) if (elapsedmillis() >= time) break;
    random_device rd;
    mt19937 rng(rd());
    #endif
    const int mod = 1e9 + 7;
     
    struct node
    {
        int edge;
        set<int> redges;
        node() : edge(-1){}
    };
     
    void dfs(int u, vi& ret, vb& vis, vector<node>& edges)
    {
        if (vis[u]) return;
        vis[u] = true;
        ret.push_back(u);
        dfs(edges[u].edge, ret, vis, edges);
    }
     
    int32_t main()
    {
        fast();
     
        int nodenum = 0;
        map<string, int> nametonode;
     
        vector<node> edges;
     
        dread(int, n);
        if (n % 2 == 1)
        {
            cout << "-1";
            quit;
        }
     
        vb mated(n);
        rep(i,n)
        {
            dread2(string, a, b);
            if (!nametonode.count(a)) nametonode[a] = nodenum++;
            if (!nametonode.count(b)) nametonode[b] = nodenum++;
     
            int u = nametonode[a];
            int v = nametonode[b];
            while (max(u, v) >= edges.size()) edges.push_back({});
     
     
     
            edges[u].edge = v;
            edges[v].redges.insert(u);
     
            if (u!=v&&edges[v].edge==u)
            {
                mated[u] = 1;
                mated[v] = 1;
            }
        }
     
        queue<int> leafs;
        rep(i, edges.size())
        {
            if (edges[i].redges.size()==0)
            {
                leafs.push(i);
            }
        }
     
        
     
        set<int> loners;
     
        int ans = 0;
        while (leafs.size())
        {
            int u = leafs.front();
            leafs.pop();
     
            if (mated[edges[u].edge])
            {
                loners.insert(u);
            }
            else
            {
                int target = edges[u].edge;
                int targetsq = edges[target].edge;
                edges[targetsq].redges.erase(target);
                if (edges[targetsq].redges.size()==0)
                {
                    leafs.push(targetsq);
                }
                mated[u] = 1;
                mated[target] = 1;
                ans++;
            }
     
        }
     
        // All that is left is loners and cycles
        // Loners != cycles of len 1
     
        // Find all cycles
        vvi cycles;
        vb vis(mated);
        rep(i, nodenum)
        {
            if (vis[i]||setcontains(loners,i)) continue;
            vi cycle;
            dfs(i, cycle, vis, edges);
            cycles.push_back(cycle);
        }
      
      int lonersz = loners.size();
     
        rep(i, cycles.size())
        {
            if (cycles[i].size()==1)
            {
                lonersz++;
            }
            else if (cycles[i].size()>2)
            {
                ans += cycles[i].size() / 2;
                if (cycles[i].size() % 2 == 1)
                {
                    lonersz++;
                }
            }
        }
     
            ans += lonersz;
      cout << ans;

     
        quit;
    }

Compilation message

polygon.cpp: In function 'int32_t main()':
polygon.cpp:179:30: warning: comparison of integer expressions of different signedness: 'const int' and 'std::vector<node>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  179 |             while (max(u, v) >= edges.size()) edges.push_back({});
      |                    ~~~~~~~~~~^~~~~~~~~~~~~~~
polygon.cpp:103:44: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<node>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  103 |     #define rep(i, high) for (int i = 0; i < high; i++)
......
  194 |         rep(i, edges.size())
      |             ~~~~~~~~~~~~~~~                 
polygon.cpp:194:9: note: in expansion of macro 'rep'
  194 |         rep(i, edges.size())
      |         ^~~
polygon.cpp:103:44: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  103 |     #define rep(i, high) for (int i = 0; i < high; i++)
......
  248 |         rep(i, cycles.size())
      |             ~~~~~~~~~~~~~~~~                
polygon.cpp:248:9: note: in expansion of macro 'rep'
  248 |         rep(i, cycles.size())
      |         ^~~

Subtask #1
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 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 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct

Subtask #2
25.0 / 25.0

# 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 1 ms 212 KB Output is correct
4 Correct 213 ms 20876 KB Output is correct
5 Correct 215 ms 19748 KB Output is correct
6 Correct 211 ms 21192 KB Output is correct
7 Correct 0 ms 212 KB Output is correct

Subtask #3
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 216 ms 18336 KB Output is correct
2 Correct 212 ms 18380 KB Output is correct
3 Correct 189 ms 24244 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 216 ms 18336 KB Output is correct
6 Correct 226 ms 18464 KB Output is correct
7 Correct 230 ms 18484 KB Output is correct
8 Correct 218 ms 19824 KB Output is correct
9 Correct 265 ms 19428 KB Output is correct
10 Correct 188 ms 23004 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct

Subtask #4
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 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 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 213 ms 20876 KB Output is correct
20 Correct 215 ms 19748 KB Output is correct
21 Correct 211 ms 21192 KB Output is correct
22 Correct 0 ms 212 KB Output is correct
23 Correct 216 ms 18336 KB Output is correct
24 Correct 212 ms 18380 KB Output is correct
25 Correct 189 ms 24244 KB Output is correct
26 Correct 0 ms 212 KB Output is correct
27 Correct 216 ms 18336 KB Output is correct
28 Correct 226 ms 18464 KB Output is correct
29 Correct 230 ms 18484 KB Output is correct
30 Correct 218 ms 19824 KB Output is correct
31 Correct 265 ms 19428 KB Output is correct
32 Correct 188 ms 23004 KB Output is correct
33 Correct 0 ms 212 KB Output is correct
34 Correct 1 ms 212 KB Output is correct
35 Correct 1 ms 212 KB Output is correct
36 Correct 1 ms 212 KB Output is correct
37 Correct 257 ms 18308 KB Output is correct
38 Correct 276 ms 18440 KB Output is correct
39 Correct 256 ms 18512 KB Output is correct
40 Correct 261 ms 18516 KB Output is correct
41 Correct 255 ms 18544 KB Output is correct
42 Correct 249 ms 18372 KB Output is correct
43 Correct 248 ms 18516 KB Output is correct
44 Correct 266 ms 18488 KB Output is correct
45 Correct 258 ms 18500 KB Output is correct
46 Correct 267 ms 18444 KB Output is correct
47 Correct 216 ms 19464 KB Output is correct
48 Correct 221 ms 18356 KB Output is correct
49 Correct 214 ms 18580 KB Output is correct
50 Correct 164 ms 24260 KB Output is correct
51 Correct 0 ms 212 KB Output is correct
52 Correct 200 ms 18244 KB Output is correct
53 Correct 228 ms 18620 KB Output is correct
54 Correct 227 ms 18472 KB Output is correct
55 Correct 213 ms 19800 KB Output is correct
56 Correct 237 ms 19480 KB Output is correct
57 Correct 189 ms 23024 KB Output is correct
58 Correct 0 ms 212 KB Output is correct
59 Correct 1 ms 212 KB Output is correct
60 Correct 0 ms 212 KB Output is correct
61 Correct 0 ms 212 KB Output is correct
62 Correct 0 ms 212 KB Output is correct
63 Correct 0 ms 212 KB Output is correct
64 Correct 0 ms 212 KB Output is correct
65 Correct 217 ms 20836 KB Output is correct
66 Correct 191 ms 19776 KB Output is correct
67 Correct 202 ms 21188 KB Output is correct
68 Correct 0 ms 212 KB Output is correct
69 Correct 0 ms 212 KB Output is correct
70 Correct 0 ms 212 KB Output is correct
71 Correct 0 ms 212 KB Output is correct
72 Correct 0 ms 212 KB Output is correct
73 Correct 0 ms 212 KB Output is correct
74 Correct 0 ms 212 KB Output is correct
75 Correct 1 ms 212 KB Output is correct
76 Correct 0 ms 212 KB Output is correct
77 Correct 0 ms 212 KB Output is correct
78 Correct 0 ms 212 KB Output is correct
79 Correct 0 ms 212 KB Output is correct
80 Correct 0 ms 212 KB Output is correct
81 Correct 1 ms 212 KB Output is correct
82 Correct 0 ms 212 KB Output is correct
83 Correct 0 ms 212 KB Output is correct