Submission #654217

#	Time	Username	Problem	Language	Result	Execution time	Memory
654217		nguyentunglam	Bali Sculptures (APIO15_sculpture)	C++14	100 / 100	107 ms	368 KiB

sculpture

#include<bits/stdc++.h>
#define forin(i, a, b) for(int i = a; i <= b; i++)
#define forde(i, a, b) for(int i = a; i >= b; i--)
#define forv(a, b) for(auto & a : b)
#define fi first
#define se second
#define ii pair<int, int>
#define endl "\n"
using namespace std;
const int N = 2010;
long long res, s[N];
int f[N], n, a, b;
bool g[110][110];
void sub5() {
    for(int bit = 40; bit >= 0; bit--) {
        memset(f, 127, sizeof(f));
        f[0] = 0;
        for(int i = 1; i <= n; i++) for(int j = 0; j < i; j++) {
            long long sum = s[i] - s[j];
            sum >>= bit; sum <<= bit;
            if ((res | sum) == res) f[i] = min(f[i], f[j] + 1);
        }
        if (f[n] > b) res |= (1LL << bit);
    }
}
void sub4() {
    for(int bit = 40; bit >= 0; bit--) {
        memset(g, 0, sizeof(g));
        g[0][0] = 1;
        for(int i = 1; i <= n; i++) for(int j = 0; j < i; j++) {
            long long sum = s[i] - s[j];
            sum >>= bit; sum <<= bit;
            if ((res | sum) == res) for(int k = 1; k <= b; k++) g[i][k] = max(g[i][k], g[j][k - 1]);
        }
        bool ok = 0;
        for(int k = a; k <= b; k++) ok |= g[n][k];
        if (!ok) res |= (1LL << bit);
    }
}
int main() {
    #define task ""
    cin.tie(0) -> sync_with_stdio(0);
    if (fopen ("task.inp", "r")) {
        freopen ("task.inp", "r", stdin);
        freopen ("task.out", "w", stdout);
    }
    if (fopen (task".inp", "r")) {
        freopen (task".inp", "r", stdin);
        freopen (task".out", "w", stdout);
    }
    cin >> n >> a >> b;
    for(int i = 1; i <= n; i++) {
        cin >> s[i]; s[i] += s[i - 1];
    }
    if (a == 1) sub5();
    else sub4();
    cout << res;
}

Compilation message (stderr)

sculpture.cpp: In function 'int main()':
sculpture.cpp:44:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   44 |         freopen ("task.inp", "r", stdin);
      |         ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
sculpture.cpp:45:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   45 |         freopen ("task.out", "w", stdout);
      |         ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
sculpture.cpp:48:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   48 |         freopen (task".inp", "r", stdin);
      |         ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
sculpture.cpp:49:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   49 |         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