Submission #152097

#TimeUsernameProblemLanguageResultExecution timeMemory
152097nicolaalexandrapopa (BOI18_popa)C++14
100 / 100
111 ms448 KiB
#include <iostream> #include "popa.h" #define DIM 1010 using namespace std; //int Left[DIM],Right[DIM],t[DIM]; int solve (int n, int *Left, int *Right){ int t[DIM]; for (int i=0;i<n;i++) Left[i] = Right[i] = t[i] = -1; /// pt ca parcurgerea in inordine e 0..n-1, arborele are structura unui arbore binar de cautare /// si tot subarborele lui i contine o subsecv compacta de nr /// val[Left[nod]] = val[nod]-1 => pe i incerc sa l pun fix desupra lui i-1 int rad = 0; for (int i=1;i<n;i++){ int x = i-1; while (x >= 0 && !query(x,x,x,i)) /// cat timp x nu e radacina subarborelui x = t[x]; if (x >= 0){ /// il adaug pe i intre nodurile x si Right[x] (pt ca Left[x] e deja fixat) Left[i] = Right[x]; /// subarborele il plasez in stanga pt ca toate nodurile sunt mai mici decat i Right[x] = i; if (Left[i] >= 0) /// poate sa fie si -1 t[Left[i]] = i; t[i] = x; } else { /// inseamna ca i va fi noua radacina Left[i] = rad; t[rad] = i; rad = i; }} return rad; }
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