Submission #1115327

#	Time	Username	Problem	Language	Result	Execution time	Memory
1115327		gdragon	Bali Sculptures (APIO15_sculpture)	C++17	0 / 100	1 ms	504 KiB

sculpture

#include <bits/stdc++.h>
using namespace std;
#define TASK "long"
#define fi first
#define se second
#define ll long long
#define pb push_back
#define ALL(x) (x).begin(), (x).end()
#define GETBIT(mask, i) ((mask) >> (i) & 1)
#define MASK(i) ((1LL) << (i))
#define SZ(x) ((int)(x).size())
#define mp make_pair
#define CNTBIT(mask) __builtin_popcount(mask)
template<class X, class Y> bool maximize(X &x, Y y){ if (x < y) {x = y; return true;} return false;};
template<class X, class Y> bool minimize(X &x, Y y){ if (x > y) {x = y; return true;} return false;};
typedef pair<int, int> ii;
const int N = 1e5 + 5;
const long long INF = (long long)1e18 + 7;
const int mod = 1e9 + 7;
int n, A, B;
vector<long long> f;
vector<vector<long long>> dp;
void read() {
    cin >> n >> A >> B;
    f.assign(n + 1, 0);
    for(int i = 1; i <= n; i++) {
        cin >> f[i];
        f[i] += f[i - 1];
    }
}
long long sum(int l, int r) {
    return f[r] - f[l - 1];
}
void calDp(int l, int r, int optl, int optr) {
    if (l > r) return;
    int best = optl;
    int mid = (l + r) >> 1;
    for(int i = optl; i <= min(mid, optr); i++) {
        long long cost = INF;
        if (dp[1][i - 1] < INF) cost = dp[1][i - 1] | sum(i, mid);
        if (minimize(dp[0][mid], cost)) best = i;
    }
    calDp(l, mid - 1, optl, best);
    calDp(mid + 1, r, best, optr);
}
void solve() {
    dp.assign(2, vector<long long>(n + 1, INF));
    dp[1][0] = 0;
    long long ans = INF;
    for(int i = 1; i <= B; i++) {
        fill(ALL(dp[0]), INF);
        calDp(1, n, 1, n);
        if (i >= A) ans = min(ans, dp[0][n]);
        swap(dp[0], dp[1]);
    }
    cout << ans;
}
signed main() {
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    if (fopen(TASK".inp", "r")) {
        freopen(TASK".inp", "r", stdin);
        freopen(TASK".out", "w", stdout);
    }
    int test = 1;
    // cin >> test;
    while(test--) {
        read();
        solve();
    }
    return 0;
}

Compilation message (stderr)

sculpture.cpp: In function 'int main()':
sculpture.cpp:61:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   61 |         freopen(TASK".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
sculpture.cpp:62:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   62 |         freopen(TASK".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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