Submission #1013011

#	Time	Username	Problem	Language	Result	Execution time	Memory
1013011		Alihan_8	Triple Jump (JOI19_jumps)	C++17	0 / 100	35 ms	7916 KiB

jumps

#include <bits/stdc++.h>

using namespace std;

#define all(x) x.begin(), x.end()
#define ar array
#define pb push_back
#define ln '\n'
#define int long long

using i64 = long long;

template <class F, class _S>
bool chmin(F &u, const _S &v){
    bool flag = false;
    if ( u > v ){
        u = v; flag |= true;
    }
    return flag;
}

template <class F, class _S>
bool chmax(F &u, const _S &v){
    bool flag = false;
    if ( u < v ){
        u = v; flag |= true;
    }
    return flag;
}

signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    int n; cin >> n;

    vector <int> a(n);

    for ( auto &u: a ){
        cin >> u;
    }

    int q; cin >> q;

    while ( q-- ){
        int l, r; cin >> l >> r;

        --l, --r;

        vector <ar<int,2>> tmp;

        for ( int i = l; i <= r; i++ ){
            tmp.pb({-a[i], i});
        }

        sort(all(tmp));

        vector <int> b;

        for ( int i = 0; i < min(21LL, (int)tmp.size()); i++ ){
            b.pb(tmp[i][1]);
        }

        sort(all(b));

        int opt = 0;

        for ( int i = 1; i + 1 < b.size(); i++ ){
            for ( int j = 0; j < i; j++ ){
                for ( int k = i + 1; k < b.size(); k++ ){
                    if ( b[i] - b[j] <= b[k] - b[i] ){
                        chmax(opt, a[b[i]] + a[b[j]] + a[b[k]]);
                    }
                }
            }
        }

        cout << opt << ln;
    }

    cout << '\n';
}

Compilation message (stderr)

jumps.cpp: In function 'int main()':
jumps.cpp:68:32: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   68 |         for ( int i = 1; i + 1 < b.size(); i++ ){
      |                          ~~~~~~^~~~~~~~~~
jumps.cpp:70:40: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   70 |                 for ( int k = i + 1; k < b.size(); k++ ){
      |                                      ~~^~~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 14
• Subtask 3: 0 / 27
• Subtask 4: 0 / 54