This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#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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