Submission #1101099

#	Time	Username	Problem	Language	Result	Execution time	Memory
1101099		Zero_OP	Bali Sculptures (APIO15_sculpture)	C++14	100 / 100	95 ms	600 KiB

sculpture

#include <bits/stdc++.h>

using namespace std;

#define rep(i, l, r) for(int i = (l), _r = (r); i < _r; ++i)
#define FOR(i, l, r) for(int i = (l), _r = (r); i <= _r; ++i)
#define ROF(i, r, l) for(int i = (r), _l = (l); i >= _l; --i)
#define all(v) begin(v), end(v)
#define compact(v) v.erase(unique(all(v)), end(v))
#define sz(v) (int)v.size()
#define dbg(x) "[" #x " = " << (x) << "]"

template<typename T>
bool minimize(T& a, const T& b){
    if(a > b) return a = b, true; return false;
}

template<typename T>
bool maximize(T& a, const T& b){
    if(a < b) return a = b, true; return false;
}

using ll = long long;
using ld = long double;

mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
template<typename T> T random_int(T l, T r){ return uniform_int_distribution<T>(l, r)(rng); }
template<typename T> T random_real(T l, T r){ return uniform_real_distribution<T>(l, r)(rng); }

const int MAX = 2e3 + 5;

int n, A, B, a[MAX];
ll pref[MAX];

ll sum(int l, int r){
    return pref[r] - pref[l - 1];
}

namespace subtask4{
    bool dp[105][105];
    void solve(){
        ll ans = (1LL << 60) - 1;
        for(int bit = 59; bit >= 0; --bit){
            ans ^= (1LL << bit); //try to erase largest bit

            memset(dp, false, sizeof(dp));
            dp[0][0] = true;
            for(int s = 1; s <= B; ++s){
                for(int i = 1; i <= n; ++i){
                    for(int j = 1; j <= i; ++j){
                        if((sum(j, i) | ans) == ans){
                            dp[s][i] |= dp[s - 1][j - 1];
                        }
                    }
                }
            }

            bool ok = false;
            for(int s = A; s <= B; ++s){
                ok |= dp[s][n];
            }

            if(!ok) ans ^= (1LL << bit); //cant
        }

        cout << ans << '\n';
    }
}

namespace subtask5{
    int dp[MAX];
    void solve(){
        ll ans = (1LL << 60) - 1;
        for(int bit = 59; bit >= 0; --bit){
            ans ^= (1LL << bit); //try to erase largest bit

            memset(dp, 0x3f, sizeof(dp));
            dp[0] = 0;
            for(int i = 1; i <= n; ++i){
                for(int j = 1; j <= i; ++j){
                    if((sum(j, i)| ans) == ans){
                        dp[i] = min(dp[i], dp[j - 1] + 1);
                    }
                }
            }

            if(dp[n] > B) ans ^= (1LL << bit); //cant
        }

        cout << ans << '\n';
    }
}

void testcase(){
    cin >> n >> A >> B;
    FOR(i, 1, n) cin >> a[i], pref[i] = pref[i - 1] + a[i];

    if(n <= 100)
        subtask4::solve();
    else
        subtask5::solve();
}

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    #define filename "task"
    if(fopen(filename".inp", "r")){
        freopen(filename".inp", "r", stdin);
        freopen(filename".out", "w", stdout);
    }

    int T = 1; //cin >> T;
    while(T--) testcase();

    return 0;
}

Compilation message (stderr)

sculpture.cpp: In function 'bool minimize(T&, const T&)':
sculpture.cpp:15:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   15 |     if(a > b) return a = b, true; return false;
      |     ^~
sculpture.cpp:15:35: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   15 |     if(a > b) return a = b, true; return false;
      |                                   ^~~~~~
sculpture.cpp: In function 'bool maximize(T&, const T&)':
sculpture.cpp:20:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   20 |     if(a < b) return a = b, true; return false;
      |     ^~
sculpture.cpp:20:35: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   20 |     if(a < b) return a = b, true; return false;
      |                                   ^~~~~~
sculpture.cpp: In function 'int main()':
sculpture.cpp:110:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  110 |         freopen(filename".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
sculpture.cpp:111:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  111 |         freopen(filename".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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