Submission #983790

#	Time	Username	Problem	Language	Result	Execution time	Memory
983790		LucaIlie	Hacker (BOI15_hac)	C++17	0 / 100	456 ms	2396 KiB

hac

#include <bits/stdc++.h>

using namespace std;

const int MAX_N = 5e5;
int v[MAX_N + 1], sp[MAX_N + 1];

int main() {
    int n;

    cin >> n;
    for ( int i = 1; i <= n; i++ ) {
        cin >> v[i];
        sp[i] = sp[i - 1] + v[i];
    }

    int maxx = 0;
    for ( int i = 1; i <= n; i++ ) {
        int minn = 1e9;
        for ( int j = 1; j <= n; j++  ) {
            if ( i == j )
                continue;

            int l, r;
            vector<int> v1, v2;

            l = i % n + 1;
            while ( l != j ) {
                v1.push_back( v[l] );
                l = l % n + 1;
            }

            l = j % n + 1;
            while ( l != i ) {
                v2.push_back( v[l] );
                l = l % n + 1;
            }
            reverse( v2.begin(), v2.end() );

            int l1 = 0, r1 = v1.size() - 1;
            int l2 = 0, r2 = v2.size() - 1;
            int s = 0, p = 0;
            while ( l1 <= r1 || l2 <= r2 ) {
                if ( p == 0 ) {
                    if ( l2 > r2 || (l1 <= r1 && v1[l1] > v2[l2]) ) {
                        s += v1[l1];
                        l1++;
                    } else {
                        s += v2[l2];
                        l2++;
                    }
                } else {
                    if ( l2 > r2 || (l1 <= r1 && v2[r1] > v2[r2]) ) {
                        s += v1[r1];
                        r1--;
                    } else {
                        s += v2[r2];
                        r2--;
                    }
                }
                p ^= 1;
            }

            minn = min( minn, s );
        }
        maxx = max( maxx, minn );
    }

    cout << maxx;

    return 0;
}

Compilation message (stderr)

hac.cpp: In function 'int main()':
hac.cpp:24:20: warning: unused variable 'r' [-Wunused-variable]
   24 |             int l, r;
      |                    ^

• Subtask 1: 0 / 20
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 40