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C++ code to find winner of math contest
Suppose we have two arrays P and T of size n. And have another number c. Amal and Bimal are going to participate one math contest. There are n problems. The ith problem has initial score P[i], and takes T[i] to solve it. P and T both are sorted in increasing order. Here c is the constant for loosing points. If a problem is submitted at time x (x minutes after starting the contest), it gives max(0, P[i] - c*x) points. Amal is going to solve problems in order 1, 2, ... n and Bimal is going to solve them like n, n-1, ... 1. We have to find who will get the maximum score. If they have got the same, it will be a 'Tie'.
So, if the input is like c = 2; P = [50, 85, 250]; T = [10, 15, 25], then the output will be Amal.
Steps
To solve this, we will follow these steps −
n := size of P m := 0 ans1 := 0 ans2 := 0 for initialize i := 0, when i < n, update (increase i by 1), do: m := m + T[i] ans1 := ans1 + maximum of (0, P[i] - c * m) m := 0 for initialize i := n - 1, when i > 1, update (decrease i by 1), do: m := m + T[i] ans2 := ans2 + maximum of (0, P[i] - c * m) if ans1 > ans2, then: return "Amal" otherwise when ans1 < ans2, then: return "Bimal" Otherwise return "Tie"
Example
Let us see the following implementation to get better understanding −
#include <bits/stdc++.h> using namespace std; string solve(int c, vector<int> P, vector<int> T){ int n = P.size(); int m = 0, ans1 = 0, ans2 = 0; for (int i = 0; i < n; i++){ m += T[i]; ans1 += max(0, P[i] - c * m); } m = 0; for (int i = n - 1; i > 1; i--){ m += T[i]; ans2 += max(0, P[i] - c * m); } if (ans1 > ans2) return "Amal"; else if (ans1 < ans2) return "Bimal"; else return "Tie"; } int main(){ int c = 2; vector<int> P = { 50, 85, 250 }; vector<int> T = { 10, 15, 25 }; cout << solve(c, P, T) << endl; }
Input
2, { 50, 85, 250 }, { 10, 15, 25 }
Output
Amal