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#include <iostream> #include <queue> #include <cmath> #include <vector> using namespace std; int rec(int x) { if(x > 5) { return 0; } return x + rec(x + 1); } int main() { cout << rec(1) << endl; return 0; } // rec(1) = 1 + rec(2) = 1 + 14 = 15 // rec(2) = 2 + rec(3) = 2 + 12 = 14 // rec(3) = 3 + rec(4) = 3 + 9 = 12 // rec(4) = 4 + rec(5) = 4 + 5 = 9 // rec(5) = 5 + rec(6) = 5 + 0 = 5 // rec(6) = 0
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