Codeforces · 2209B

Array

This C++ solution uses simulation for Codeforces 2209B Array. Read the reasoning, inspect the code, or try your own test case below.

2209BArrays & prefix sumsSimulationC++35 lines
Solution017of 248
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Approach

Simulation

Array matches counting, for every chosen element, later elements closer to a selected K; the code checks the required extreme candidates.

Arrays & prefix sums

Problem and code

Useful links.

Written by benbenyaojifen. Try the problem first, then compare your approach with the code.

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Implementation

B_Array.cpp

C++

    #include <bits/stdc++.h>
    using namespace std;
    using ll = long long;
    using i128 = __int128;
    const int inf = 1e9;
    const ll INF = 1e18; //❄️
    void solve() {
        int n; cin >> n;
        vector<int> v(n);
        int mx = -1;
        for (int i = 0; i < n; i++) {
            cin >> v[i];
            mx = max(mx, v[i]);
        }
     
        for (int i = 0; i < n; i++) {
            ll cnt1 = 0, cnt2 = 0;
            for (int j = i + 1; j < n; j++) {
                if (abs(v[i] + mx) > abs(v[j] + mx)) cnt1++;
            }
            for (int j = i + 1; j < n; j++) {
                if (abs(v[i] - mx) > abs(v[j] - mx)) cnt2++;
            }
            cout << max(cnt1, cnt2) << " ";
        }
        cout << '\n';
    }
    int main() {
        ios::sync_with_stdio(0); cin.tie(0); 
        int t; cin >> t;
        while (t--) {
            solve();
        }
        return 0;
    }
        

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