Submission #70658

#	Time	Username	Problem	Language	Result	Execution time	Memory
70658		evpipis	Bali Sculptures (APIO15_sculpture)	C++11	100 / 100	112 ms	1176 KiB

sculpture

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
const int inf = 1e9;
int dp1[105][105], dp2[2005], n, a, b, arr[2005];

bool solve1(ll x){
    dp1[n+1][0] = 1;
    for (int i = n; i >= 1; i--)
        for (int k = 1; k <= b; k++){
            ll sum = 0;
            dp1[i][k] = 0;
            for (int j = i; j <= n; j++){
                sum += arr[j];
                if ((sum|x) == x)
                    dp1[i][k] |= dp1[j+1][k-1];
            }
        }

    for (int k = a; k <= b; k++)
        if (dp1[1][k]) return true;
    return false;
}

bool solve2(ll x){
    for (int i = n; i >= 1; i--){
        ll sum = 0;
        dp2[i] = inf;
        for (int j = i; j <= n; j++){
            sum += arr[j];
            if ((sum|x) == x)
                dp2[i] = min(dp2[i], dp2[j+1]+1);
        }
    }

    return (dp2[1] <= b);
}

int main(){
    scanf("%d %d %d", &n, &a, &b);
    for (int i = 1; i <= n; i++)
        scanf("%d", &arr[i]);

    ll ans = (1LL<<41)-1;
    for (int j = 40; j >= 0; j--){
        if (a != 1 && solve1(ans^(1LL<<j)))
            ans ^= (1LL<<j);
        if (a == 1 && solve2(ans^(1LL<<j)))
            ans ^= (1LL<<j);
    }

    printf("%lld\n", ans);
    return 0;
}

Compilation message (stderr)

sculpture.cpp: In function 'int main()':
sculpture.cpp:41:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d %d", &n, &a, &b);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
sculpture.cpp:43:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &arr[i]);
         ~~~~~^~~~~~~~~~~~~~~

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