Cod sursa(job #2028720)

Utilizator damian_belesDamian Beles damian_beles Data 28 septembrie 2017 15:05:16
Problema Cautare binara Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.14 kb
#include <fstream>
#define MAX_SIZE 100005
using namespace std;
ifstream fin ("cautbin.in");
ofstream fout ("cautbin.out");
int vSize, v[MAX_SIZE], qSize, position;
bool verify (int middle, int number, int type) {
    switch (type) {
        case 2: return (v[middle] >= number); break;
        default: return (v[middle] > number); break;
    }
}
int value(int type, int left, int right, int number) {
    switch (type) {
        case 0: if (v[right] == number) return right;
                else return -1; break;
        case 1: return right; break;
        case 2: return left; break;
    }
}
int caut_bin (int type, int number, int left, int right) {
    while (left <= right) {
        int middle = (left + right) / 2;
        if (verify(middle, number, type))
            right = middle - 1;
        else left = middle + 1;
    }
    return value(type, left, right, number);
}
int main () {
    int type, number;
    fin >> vSize;
    for (int i = 1; i <= vSize; ++i) {
        fin >> v[i];
    }
    fin >> qSize;
    for (int i = 1; i <= qSize; ++i) {
        fin >> type >> number;
        fout << caut_bin(type, number, 1, vSize) << "\n";
    }
    return 0;
}