제출 #558805

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
558805		ljuba	Bali Sculptures (APIO15_sculpture)	C++17	100 / 100	122 ms	460 KiB

sculpture

#include <bits/stdc++.h>
 
using namespace std;
 
typedef long long ll;
typedef long double ld;
 
typedef vector<int> vi;
typedef vector<ll> vll;
 
typedef vector<vi> vvi;
typedef vector<vll> vvll;
 
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
 
typedef vector<pii> vpii;
typedef vector<pll> vpll;
 
typedef vector<vpii> vvpii;
typedef vector<vpll> vvpll;
 
#define pb push_back
#define mp make_pair
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define sz(x) (int)(x).size()
#define fi first
#define se second
 
template<class T> bool ckmin(T &a, const T &b) {return a > b ? a = b, 1 : 0;}
template<class T> bool ckmax(T &a, const T &b) {return a < b ? a = b, 1 : 0;}
 
namespace debug {
    void __print(int x) {cerr << x;}
    void __print(long long x) {cerr << x;}
    void __print(double x) {cerr << x;}
    void __print(long double x) {cerr << x;}
    void __print(char x) {cerr << '\'' << x << '\'';}
    void __print(const string &x) {cerr << '\"' << x << '\"';}
    void __print(const char *x) {cerr << '\"' << x << '\"';}
    void __print(bool x) {cerr << (x ? "true" : "false");}
 
    template<typename T, typename V>
    void __print(const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ','; __print(x.second); cerr << '}';}
    template<typename T>
    void __print(const T &x) {int f = 0; cerr << '{'; for(auto z : x) cerr << (f++ ? "," : ""), __print(z); cerr << "}";}
    void _print() {cerr << "]\n";}
    template <typename T, typename... V>
    void _print(T t, V... v) {__print(t); if(sizeof...(v)) cerr << ", "; _print(v...);}
 
#ifdef ljuba
#define dbg(x...) cerr << "\e[91m" << "LINE(" << __LINE__ << ") -> " << "[" << #x << "] = ["; _print(x)
#else
#define dbg(x...)
#endif
}
 
using namespace debug;
 
const char nl = '\n';
 
mt19937 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
 
/*
погледај сампле тестове, пре него што имплементираш (можда имаш погрешну идеју) 
уместо да разматраш неке глупе случајеве на папиру, размишљај заправо о задатку
*/

const int LG = 43;

const ll INF = 1e18 + 12;

void solve() {
    //nice problem, but different approach for different subtasks is ugly
    int n, a, b;
    cin >> n >> a >> b;

    vll v(n);
    for(auto &z : v) cin >> z;

    vll pref(n+1);
    for(int i = 0; i < n; ++i) {
        pref[i+1] = pref[i] + v[i];
    }

    ll ans = (1LL<<LG) - 1;

    auto moze = [&](ll x) {
        if(a == 1) {
            vll dp(n+1, INF);
            dp[0] = 0;

            for(int i = 1; i <= n; ++i) {
                for(int j = i-1; j >= 0; --j) {
                    ll suma = pref[i] - pref[j];
                    if((suma | x) != x) continue;
                    //1101110
                    //1010000
                    //  .
                    ckmin(dp[i], dp[j] + 1);
                }
            }

            return dp[n] <= b;
        }

        vector<vector<bool>> dp(n+1, vector<bool>(n+1, false));
        dp[0][0] = true;
        for(int i = 1; i <= n; ++i) {
            for(int j = i-1; j >= 0; --j) {
                for(int k = 0; k <= n; ++k) {
                    ll suma = pref[i] - pref[j];
                    if((suma | x) != x) continue;
                    if(dp[j][k]) dp[i][k+1] = true;
                    // dp[i][k+1] = dp[j][k];
                }
            }
        }

        for(int i = a; i <= b; ++i) {
            if(dp[n][i]) return true;
        }

        return false;
    };

    for(int i = LG-1; i >= 0; --i) {
        if(moze(ans-(1LL<<i))) {
            ans -= (1LL<<i);
        }
    }

    cout << ans << nl;
}
 
int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
 
    int testCases = 1;
    //cin >> testCases;
    while(testCases--)
        solve();
}

• Subtask 1: 9 / 9
• Subtask 2: 16 / 16
• Subtask 3: 21 / 21
• Subtask 4: 25 / 25
• Subtask 5: 29 / 29