Binsearch

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Chef has just finished practicing binary search and tries to perform it on permutations. For a permutation $P$ of length $N$, Chef wants to find a particular number $X$ in the permutation. To do this, he calls the function `binsearch`$(P, 1, N, X)$: ```cpp long long int binsearch(int P[], int L, int R, int X) { if(L>R) return 0; int MID = (L + R) / 2; if(P[MID] == X || L =

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solution.cppC++17

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