Submission #398716

#	Time	Username	Problem	Language	Result	Execution time	Memory
398716		Falcon	Bali Sculptures (APIO15_sculpture)	C++17	50 / 100	177 ms	452 KiB

sculpture

#pragma GCC optimize("O2")

#include <bits/stdc++.h>

#ifdef DEBUG
#include "debug.hpp"
#endif

using namespace std;

#define all(c)              (c).begin(), (c).end()
#define rall(c)             (c).rbegin(), (c).rend()
#define traverse(c, it)     for(auto it = (c).begin(); it != (c).end(); ++it)
#define rep(i, N)           for(int i = 0; i < (N); ++i)
#define rrep(i, N)          for(int i = (N) - 1; i >= 0; --i)
#define rep1(i, N)          for(int i = 1; i <= (N); ++i)
#define rep2(i, s, e)       for(int i = (s); i <= (e); ++i)
#define rep3(i, s, e, d)    for(int i = (s); (d) >= 0 ? i <= (e) : i >= (e); i += (d))

#ifdef DEBUG
#define debug(x...)         { \
                            ++dbg::depth; \
                            string dbg_vals = dbg::to_string(x); \
                            --dbg::depth; \
                            dbg::fprint(__func__, __LINE__, #x, dbg_vals); \
                            }

#define light_debug(x)      { \
                            dbg::light = true; \
                            dbg::dout << __func__ << ":" << __LINE__; \
                            dbg::dout << "  " << #x << " = " << x << endl; \
                            dbg::light = false; \
                            }
#else
#define debug(x...)         42
#define light_debug(x)      42
#endif


using ll = long long;

template<typename T>
inline T& ckmin(T& a, T b) { return a = a > b ? b : a; }

template<typename T>
inline T& ckmax(T& a, T b) { return a = a < b ? b : a; }


int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    
    #ifdef DEBUG
    freopen("debug", "w", stderr);
    #endif

    constexpr int MAX_BITS{50};

    int N, A, B; cin >> N >> A >> B;
    vector<long long> Y(N + 1); rep1(i, N) cin >> Y[i];
    partial_sum(all(Y), Y.begin());

    long long mask = (2LL << MAX_BITS) - 1;
    if(A > 1) {
        for(int b = MAX_BITS; b >= 0; --b) {
            mask ^= 1LL << b;
            vector<vector<bool>> dp(N + 1, vector<bool>(N + 1));
            dp[0][0] = true;
            rep1(i, N) {
                dp[i][1] = (mask | Y[i]) == mask;
                rep2(k, 2, i)
                    rep2(j, k - 1, i)
                        dp[i][k] = dp[i][k] ||
                        (dp[j][k - 1] && (mask | (Y[i] - Y[j])) == mask);
            }

            bool possible = false;
            rep2(i, A, B) possible |= dp[N][i];
            debug(b, possible);
            
            if(!possible) mask ^= 1LL << b;
        }
    } else {
        for(int b = MAX_BITS; b >= 0; --b) {
            mask ^= 1LL << b;
            vector<int> dp(N + 1, N + 1);
            dp[0] = 0;
            rep1(i, N)
                rep(j, i)
                    if((mask | (Y[i] - Y[j])) == mask)
                        ckmin(dp[i], dp[j] + 1);
            debug(dp);
            if(dp[N] > B) mask ^= 1LL << b;
        }
    }

    cout << mask << '\n';

    #ifdef DEBUG
    dbg::dout << "\nExecution time: " << clock() * 1000 / CLOCKS_PER_SEC  << "ms" << endl;
    #endif

    return 0;
}

Compilation message (stderr)

sculpture.cpp: In function 'int main()':
sculpture.cpp:35:29: warning: statement has no effect [-Wunused-value]
   35 | #define debug(x...)         42
      |                             ^~
sculpture.cpp:79:13: note: in expansion of macro 'debug'
   79 |             debug(b, possible);
      |             ^~~~~
sculpture.cpp:35:29: warning: statement has no effect [-Wunused-value]
   35 | #define debug(x...)         42
      |                             ^~
sculpture.cpp:92:13: note: in expansion of macro 'debug'
   92 |             debug(dp);
      |             ^~~~~

• Subtask 1: 0 / 9
• Subtask 2: 0 / 16
• Subtask 3: 21 / 21
• Subtask 4: 0 / 25
• Subtask 5: 29 / 29