Submission #145356

#	Time	Username	Problem	Language	Result	Execution time	Memory
145356		karma	Bali Sculptures (APIO15_sculpture)	C++11	50 / 100	149 ms	504 KiB

sculpture

#include<bits/stdc++.h>
#define FileName      "test"
#define ll            long long
#define ld            long double
#define ull           unsigned long long
#define Debug(x)      cerr << #x << "is " << x << '\n';
#define pb            emplace_back
#define mp            make_pair
#define fi            first
#define se            second
//#define LuckyAurora
//#pragma GCC target ("avx2")
//#pragma GCC optimization ("O3")
//#pragma GCC optimization ("unroll-loops")
//#pragma GCC optimize("Ofast,no-stack-protector")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")

using namespace std;

template<typename T> inline void Cin(T &x)
{
    char c;
    T sign = 1;
    x = 0;
    for (c = getchar(); c < '0' || c > '9'; c = getchar())
        if (c == '-') sign = -1;
    for (; c >= '0' && c <= '9'; c = getchar())
        x = x * 10 + c - '0';
    x *= sign;
}
template <typename T> inline void Out(T x) {if(x > 9) Out(x / 10); putchar(x % 10 + '0');}
template <typename T> inline void Cout(T x, char c) {if(x < 0) putchar('-'); x = abs(x); Out(x); putchar(c);}
template <typename T, typename... Args> inline void Cin(T& a, Args&... args) {Cin(a);Cin(args...);}
template <typename T, typename... Args> inline void Cout(T a, char c, Args... args) {Cout(a, c);Cout(args...);}

const ll inf = (1ll << 50) - 1;
const int N = 2e3 + 7;

ll a[N];
int n, l, r;

void Enter()
{
     cin >> n >> l >> r;
     for(int i = 1; i <= n; ++i) {
        cin >> a[i];
        a[i] += a[i - 1];
     }
}

void Solve()
{
     if(l == 1) {
        ll res = inf;
        for(int bit = 49; bit >= 0; --bit) {
           vector<int> f(n + 1, n + 1);
           f[0] = 0; res -= (1ll << bit);
           for(int i = 1; i <= n; ++i) {
              for(int j = 0; j < i; ++j)
                 if(((a[i] - a[j]) | res) == res) f[i] = min(f[i], f[j] + 1);
           }
           if(f[n] > r) res += (1ll << bit);
        }
        cout << res;
     } else {
        vector< vector<ll> > f;
        f.resize(n + 1);
        f[0].resize(n + 1, inf);
        f[0][0] = 0;
        for(int i = 1; i <= n; ++i) {
            f[i].resize(n + 1, inf);
            for(int j = 1; j <= r; ++j) {
                for(int k = 0; k < i; ++k)
                   f[i][j] = min(f[i][j], f[k][j - 1] | (a[i] - a[k]));
            }
        }
        ll res = inf;
        for(int i = l; i <= r; ++i) res = min(res, f[n][i]);
        cout << res;
    }
}

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    if(fopen(FileName".inp", "r")) {
        freopen(FileName".inp", "r", stdin);
        freopen(FileName".out", "w", stdout);
    }

    /* int nTest; cin >> nTest;
    while(nTest --)*/ Enter(), Solve();

    return 0;
}

Compilation message (stderr)

sculpture.cpp: In function 'int main()':
sculpture.cpp:88:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
         freopen(FileName".inp", "r", stdin);
         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
sculpture.cpp:89:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
         freopen(FileName".out", "w", stdout);
         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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