Submission #270477

#	Time	Username	Problem	Language	Result	Execution time	Memory
270477		BeanZ	Bali Sculptures (APIO15_sculpture)	C++14	50 / 100	537 ms	512 KiB

sculpture

#include <bits/stdc++.h>

using namespace std;

#define ll long long
#define endl '\n'
const int N = 3e6 + 5;
ll dp[2005], f[2005], a[2005], sum[2005];
ll ans = 0;
bool chk(ll now, ll s){
        for (int i = 41; i >= s; i--){
                if ((ans & (1ll << i)) == 0){
                        if (now & (1ll << i)){
                                return false;
                        }
                }
        }
        return true;
}
int main(){
        ios_base::sync_with_stdio(false);
        cin.tie(0);
        if (fopen("VietCT.INP", "r")){
                freopen("VietCT.INP", "r", stdin);
                freopen("VietCT.OUT", "w", stdout);
        }
        ll n, L, R;
        cin >> n >> L >> R;
        for (int i = 1; i <= n; i++) cin >> a[i];
        for (int i = 1; i <= n; i++) sum[i] = sum[i - 1] + a[i];
        for (int s = 41; s >= 0; s--){
                for (int i = 1; i <= n; i++){
                        f[i] = dp[i];
                }
                for (int i = 1; i <= n; i++){
                        if (f[i] == -1) continue;
                        f[i] = 1e9;
                        for (int j = 0; j < i; j++){
                                if (f[j] == -1) continue;
                                ll cost = sum[i] - sum[j];
                                if (chk(cost, s)){
                                        f[i] = min(f[i], f[j] + 1);
                                }
                        }
                        if (f[i] == 1e9) f[i] = -1;
                        //cout << f[i] << " ";
                }
                //cout << endl;
                if (f[n] <= R && f[n] != -1){
                        for (int i = 1; i <= n; i++){
                                if (f[i] <= R) dp[i] = f[i];
                                else dp[i] = -1;
                        }
                } else {
                        ans = ans + (1ll << s);
                }
        }
        cout << ans;
}
/*
6 1 3
8 1 2 1 5 4
*/

Compilation message (stderr)

sculpture.cpp: In function 'int main()':
sculpture.cpp:24:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   24 |                 freopen("VietCT.INP", "r", stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
sculpture.cpp:25:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   25 |                 freopen("VietCT.OUT", "w", stdout);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

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