Submission #925765

#	Time	Username	Problem	Language	Result	Execution time	Memory
925765		Boycl07	Bali Sculptures (APIO15_sculpture)	C++17	100 / 100	72 ms	600 KiB

sculpture

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

#define rep(i, n) for(int i = 1; i <= n; ++i)
#define forn(i, l, r) for(int i = l; i <= r; ++i)
#define ford(i, r, l) for(int i = r; i >= l; --i)
#define FOR(i, n) for(int i = 0; i < n; ++i)
#define FORD(i, n) for(int i = n - 1; i >= 0; --i)
#define fi first
#define se second
#define pii pair<int, int>
#define pll pair<ll, ll>
#define pb push_back
#define endl "\n"
#define task "sculptures"
#define sz(a) int(a.size())
#define C(x, y) make_pair(x, y)
#define all(a) (a).begin(), (a).end()
#define bit(i, mask) (mask >> i & 1)

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

inline int readInt()       {char c;while(c=getchar(),c!='-'&&(c<'0'||c>'9'));bool sign=(c=='-');if(sign)c=getchar();int n=c-'0';while(c=getchar(),c>='0'&&c<='9')n=10*n+c-'0';return(!sign)?n:-n;}
inline ll readLong()       {char c;while(c=getchar(),c!='-'&&(c<'0'||c>'9'));bool sign=(c=='-');if(sign)c=getchar();ll  n=c-'0';while(c=getchar(),c>='0'&&c<='9')n=10*n+c-'0';return(!sign)?n:-n;}
inline string readString() {char c;while(c=getchar(),c==' '||c=='\n'||c=='\t');string s({c});while(c=getchar(),c!=EOF&&c!=' '&&c!='\n'&&c!='\t')s+=c;return s;}


const int N =  1e5 + 10;
const int M = 1e3 + 3;
const int N1 = 2e3 + 10;
const int K = 1e2 + 1;
const int MOD = 1e9 + 7;
const int INF = 0x3f3f3f3f;
const ll LINF = 1e17 + 2;
const int block_size = 500;
const int LOG = 40;
const int offset = N;
const int LIM = 11 ;
const int AL = 26;

int n, L, R;
int a[N];


bool check(ll res)
{
    if(n <= 100)
    {
        vector<vector<int>> dp(n + 1, vector<int>(n + 1));
        dp[0][0] = 1;
        rep(i, n)
        {

            forn(k, 1, n)
            {
                ll cur = 0;
                ford(j, i, 1)
                {
                    cur += a[j];
                    if((cur & res) == 0)
                        dp[i][k] |= dp[j - 1][k - 1];
                }
            }
        }
        forn(i, L, R) if(dp[n][i]) return 1;
        return 0;
    }
    else
    {
        vector<int> dp(n + 1);
        dp[0] = 0;
        rep(i, n)
        {
            dp[i] = n + 1;
            ll cur = 0;
            ford(j, i, 1)
            {
                cur += a[j];
                if((cur & res) == 0)
                    minimize(dp[i], dp[j - 1] + 1);
            }
        }
        return dp[n] <= R;
    }
}

void solve()
{
    cin >> n >> L >> R;
    rep(i, n) cin >> a[i];
    ll res = 0;

    for(int bit = LOG; bit >= 0; --bit)
    {
        res |= 1ll << bit;
        if(!check(res))
            res ^= 1ll << bit;
    }
    for(int bit = LOG; bit >= 0; --bit) res ^= 1ll << bit;
    cout << res;
}

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

    int TC = 1;

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


    while(TC--)
    {
        solve();
        cout << endl;
    }

    return 0;
}

Compilation message (stderr)

sculpture.cpp: In function 'int main()':
sculpture.cpp:116:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  116 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
sculpture.cpp:117:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  117 |         freopen(task".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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