Submission #455342

#	Time	Username	Problem	Language	Result	Execution time	Memory
455342		qwerasdfzxcl	Bali Sculptures (APIO15_sculpture)	C++14	100 / 100	435 ms	500 KiB

sculpture

#include <bits/stdc++.h>

typedef long long ll;
using namespace std;
int a[2020], dp2[2020];
bool dp[2020][2020];

void solve(int n, int r){
    ll cur = 0, ans = 0;
    for (int i=60;i>=0;i--){
        for (int j=0;j<=n;j++) fill(dp2, dp2+2020, 1e9);
        cur |= 1LL<<i;
        ll cur2 = 0;
        for (int j=1;j<=n;j++){
            cur2 += a[j];
            if ((cur2&cur)==(ans&cur2)) dp2[j] = 1;
            ll cur3 = 0;
            for (int l=j;l;l--){
                cur3 += a[l];
                if ((cur3&cur)==(ans&cur3)) dp2[j] = min(dp2[j], dp2[l-1]+1);
            }
        }
        if (dp2[n]>r) ans |= 1LL<<i;
    }
    printf("%lld\n", ans);
    exit(0);
}

int main(){
    int n, l, r;
    scanf("%d %d %d", &n, &l, &r);
    for (int i=1;i<=n;i++) scanf("%d", a+i);
    if (l==1) solve(n, r);
    ll cur = 0, ans = 0;
    for (int i=60;i>=0;i--){
        for (int j=0;j<=n;j++) fill(dp[j], dp[j]+n+1, 0);
        cur |= 1LL<<i;
        ll cur2 = 0;
        for (int j=1;j<=n;j++){
            cur2 += a[j];
            if ((cur2&cur)==(ans&cur2)) dp[j][1] = 1;
            for (int k=2;k<=j;k++){
                ll cur3 = 0;
                for (int l=j;l>k-1;l--){
                    cur3 += a[l];
                    if (dp[l-1][k-1] && (cur3&cur)==(ans&cur3)) dp[j][k] = 1;
                }
            }
        }
        bool flag = 1;
        for (int j=l;j<=r;j++) if (dp[n][j]) flag = 0;
        if (flag) ans |= 1LL<<i;
    }
    printf("%lld\n", ans);
    return 0;
}

Compilation message (stderr)

sculpture.cpp: In function 'int main()':
sculpture.cpp:31:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   31 |     scanf("%d %d %d", &n, &l, &r);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
sculpture.cpp:32:33: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   32 |     for (int i=1;i<=n;i++) scanf("%d", a+i);
      |                            ~~~~~^~~~~~~~~~~

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