Submission #867348

#	Time	Username	Problem	Language	Result	Execution time	Memory
867348		efedmrlr	Group Photo (JOI21_ho_t3)	C++17	64 / 100	5047 ms	98916 KiB

Main

#include <bits/stdc++.h>

using namespace std;

#define n_l '\n'
#define dbg(...) cout << "[" << #__VA_ARGS__ << "]: "; cout << to_string(__VA_ARGS__) << endl
template <typename T, size_t N> int SIZE(const T (&t)[N]){ return N; } template<typename T> int SIZE(const T &t){ return t.size(); } string to_string(const string s, int x1=0, int x2=1e9){ return '"' + ((x1 < s.size()) ? s.substr(x1, x2-x1+1) : "") + '"'; } string to_string(const char* s) { return to_string((string) s); } string to_string(const bool b) { return (b ? "true" : "false"); } string to_string(const char c){ return string({c}); } template<size_t N> string to_string(const bitset<N> &b, int x1=0, int x2=1e9){ string t = ""; for(int __iii__ = min(x1,SIZE(b)),  __jjj__ = min(x2, SIZE(b)-1); __iii__ <= __jjj__; ++__iii__){ t += b[__iii__] + '0'; } return '"' + t + '"'; } template <typename A, typename... C> string to_string(const A (&v), int x1=0, int x2=1e9, C... coords); int l_v_l_v_l = 0, t_a_b_s = 0; template <typename A, typename B> string to_string(const pair<A, B> &p) { l_v_l_v_l++; string res = "(" + to_string(p.first) + ", " + to_string(p.second) + ")"; l_v_l_v_l--; return res; } template <typename A, typename... C> string to_string(const A (&v), int x1, int x2, C... coords) { int rnk = rank<A>::value; string tab(t_a_b_s, ' '); string res = ""; bool first = true; if(l_v_l_v_l == 0) res += n_l; res += tab + "["; x1 = min(x1, SIZE(v)), x2 = min(x2, SIZE(v)); auto l = begin(v); advance(l, x1); auto r = l; advance(r, (x2-x1) + (x2 < SIZE(v))); for (auto e = l; e != r; e = next(e)) { if (!first) { res += ", "; } first = false; l_v_l_v_l++; if(e != l){ if(rnk > 1) { res += n_l; t_a_b_s = l_v_l_v_l; }; } else{ t_a_b_s = 0; } res += to_string(*e, coords...); l_v_l_v_l--; } res += "]"; if(l_v_l_v_l == 0) res += n_l; return res; } void dbgm(){;} template<typename Heads, typename... Tails> void dbgm(Heads H, Tails... T){ cout << to_string(H) << " | "; dbgm(T...); } 
#define dbgm(...) cout << "[" << #__VA_ARGS__ << "]: "; dbgm(__VA_ARGS__); cout << endl


#define lli long long int
#define MP make_pair
#define pb push_back
#define REP(i,n) for(int (i) = 0; (i) < (n); (i)++)
#pragma GCC optimize("O1,O2,O3")
void fastio() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
}


const double EPS = 0.00001;
const int INF = 1e9+500;
const int N = 1e5+5;
const int M = 3e5+5;
const int ALPH = 26;
const int LGN = 25;
const int MOD = 1e9+7;
int n,m,q;
vector<int> h, dp;
vector<vector<int> > cost;

struct SegTree {
    vector<int> data;
    int sz;
    SegTree(int sz) {
        this->sz = sz;
        data.assign(4*(sz + 1), 0);
    }
    void update(int tl, int tr, int v ,int ind ,int val)  {
        if(tl == tr) {
            data[v] += val;
            return;
        }
        int tm  = (tl + tr) / 2;
        if(ind <= tm) {
            update(tl, tm, v*2, ind, val);
        }
        else {
            update(tm+1, tr ,v*2+1, ind, val);
        }
        data[v] = data[v*2] + data[v*2+1];
    }
    void update(int ind ,int val) {
        update(0, sz, 1, ind ,val);
    }
    int query(int tl, int tr, int v, int l, int r) {
        if(tl >= l && tr <= r) {
            return data[v];
        }
        if(tl > r || tr < l) {
            return 0;
        }
        int tm = (tl + tr) >> 1;
        return query(tl, tm, v*2, l, r) + query(tm+1, tr, v*2+1, l, r);
    }
    int query(int l, int r) {
        return query(0, sz, 1, l, r);
    }
    int order(int x) {
        return query(0, x);
    }
    void insert(int x) {
        if(query(x,x)) return;
        update(x, 1);
    }
    void erase(int x) {
        if(query(x,x) == 0) return;
        update(x, -1);
    }
 
};


void calc_cost(int x) {
    vector<int> nwh;
    vector<array<int,2> > ord;
    for(int i = 1; i<=n; i++) {
        if(h[i] < x) continue;
        nwh.pb(h[i]);
        ord.pb({h[i] , (int)nwh.size() - 1});
    }
    SegTree st(nwh.size()), st2(nwh.size());
    for(int i = 0; i<nwh.size(); i++) {
        st.insert(i);
    }
    sort(ord.begin(), ord.end());    

    int cst = 0;
    for(int i = 0; i<ord.size(); i++) {
        int deg = st2.query(ord[i][1] + 1, nwh.size());
        st2.insert(ord[i][1]);

        cst += st.order(ord[i][1]) - 1 + (i) - (deg * 2);
        st.erase(ord[i][1]);
        cost[x][ord[i][0]] = cst;
    }   
    
}

inline void solve() {
    cin >> n;
    h.resize(n+1);
    dp.assign(n+1, INF);
    for(int i = 1; i<=n; i++) {
        cin>>h[i];
    }
    cost.assign(n+1, vector<int>(n+1,0));

    for(int i = 1; i<=n; i++) {
    
        calc_cost(i);
    }
    dp[0] = 0;
    for(int i = 1 ;i<=n; i++) {

        for(int j = 0; j<i; j++) {
            dp[i] = min(dp[i] , dp[j] + cost[j+1][i]);
        }
    }

    cout<<dp[n]<<"\n";

}   
 
signed main() {
    fastio();
    int test = 1;
    //cin>>test;
    while(test--) {
        solve();
    }
    
}

Compilation message (stderr)

Main.cpp: In function 'std::string to_string(std::string, int, int)':
Main.cpp:7:208: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    7 | template <typename T, size_t N> int SIZE(const T (&t)[N]){ return N; } template<typename T> int SIZE(const T &t){ return t.size(); } string to_string(const string s, int x1=0, int x2=1e9){ return '"' + ((x1 < s.size()) ? s.substr(x1, x2-x1+1) : "") + '"'; } string to_string(const char* s) { return to_string((string) s); } string to_string(const bool b) { return (b ? "true" : "false"); } string to_string(const char c){ return string({c}); } template<size_t N> string to_string(const bitset<N> &b, int x1=0, int x2=1e9){ string t = ""; for(int __iii__ = min(x1,SIZE(b)),  __jjj__ = min(x2, SIZE(b)-1); __iii__ <= __jjj__; ++__iii__){ t += b[__iii__] + '0'; } return '"' + t + '"'; } template <typename A, typename... C> string to_string(const A (&v), int x1=0, int x2=1e9, C... coords); int l_v_l_v_l = 0, t_a_b_s = 0; template <typename A, typename B> string to_string(const pair<A, B> &p) { l_v_l_v_l++; string res = "(" + to_string(p.first) + ", " + to_string(p.second) + ")"; l_v_l_v_l--; return res; } template <typename A, typename... C> string to_string(const A (&v), int x1, int x2, C... coords) { int rnk = rank<A>::value; string tab(t_a_b_s, ' '); string res = ""; bool first = true; if(l_v_l_v_l == 0) res += n_l; res += tab + "["; x1 = min(x1, SIZE(v)), x2 = min(x2, SIZE(v)); auto l = begin(v); advance(l, x1); auto r = l; advance(r, (x2-x1) + (x2 < SIZE(v))); for (auto e = l; e != r; e = next(e)) { if (!first) { res += ", "; } first = false; l_v_l_v_l++; if(e != l){ if(rnk > 1) { res += n_l; t_a_b_s = l_v_l_v_l; }; } else{ t_a_b_s = 0; } res += to_string(*e, coords...); l_v_l_v_l--; } res += "]"; if(l_v_l_v_l == 0) res += n_l; return res; } void dbgm(){;} template<typename Heads, typename... Tails> void dbgm(Heads H, Tails... T){ cout << to_string(H) << " | "; dbgm(T...); }
      |                                                                                                                                                                                                             ~~~^~~~~~~~~~
Main.cpp: In function 'void calc_cost(int)':
Main.cpp:94:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   94 |     for(int i = 0; i<nwh.size(); i++) {
      |                    ~^~~~~~~~~~~
Main.cpp:100:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::array<int, 2> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  100 |     for(int i = 0; i<ord.size(); i++) {
      |                    ~^~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 7 / 7
• Subtask 3: 32 / 32
• Subtask 4: 20 / 20
• Subtask 5: 0 / 36