Codeforces · 2193A

DBMB and the Array

This C++ solution uses simulation for Codeforces 2193A DBMB and the Array. Read the reasoning, inspect the code, or try your own test case below.

2193AArrays & prefix sumsSimulationC++23 lines
Solution070of 248
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Approach

Simulation

DBMB and the Array's reachability condition matches checking sum <= S and divisibility of the remaining amount by X.

Arrays & prefix sums

Problem and code

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

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Implementation

A_DBMB_and_the_Array.cpp

C++

    #include <bits/stdc++.h>
    using namespace std;
    typedef long long ll;
    const int inf = 1e9;
    const long long INF = 1e17; //❄️
    void solve() {
        int n, s, x; cin >> n >> s >> x;
        int sum = 0;
        for (int i = 0; i < n; i++) {
            int v; cin >> v;
            sum += v;
        }
        if (sum <= s && (s - sum) % x == 0) cout << "YES" << '\n';
        else cout << "NO" << '\n';
    }
    int main() {
        ios::sync_with_stdio(0); cin.tie(0); 
        int t; cin >> t;
        while (t--) {
            solve();
        }
        return 0;
    }
        

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