Cod sursa(job #1464814)

Utilizator DuxarFII-Stefan-Negrus Duxar Data 25 iulie 2015 05:31:47
Problema Cautare binara Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 2.34 kb
#ifdef ONLINE_JUDGE
	#include <bits/stdc++.h>
#else
	#include <algorithm>
	#include <bitset>
	#include <cassert>
	#include <cmath>
	#include <cstdio>
	#include <cstdlib>
	#include <cstring>
	#include <iostream>
	#include <map>
	#include <set>
	#include <stack>
	#include <string>
	#include <utility>
	#include <vector>
	#include <queue>
	#include <climits>
#endif

using namespace std;

	// lambda : [] (int a, int b) -> bool { body return }
	// string r_str = R"(raw string)"

#define mp make_pair
#define mt make_tuple
#define eb emplace_back
#define pb push_back
#define LL long long
#define ULL unsigned long long
#define BASE 73
#define NMAX 10000
#define NMAX2 20001
#define MOD1 1000000007
#define ALL(V) (V).begin(), (V).end()
#define ALLR(V) (V).rbegin(), (V).rend()
#define CRLINE Duxar(__LINE__);
#define SHOWME(x) cerr << __LINE__ << ": " << #x << " = " << (x) << endl;
#define ENTER putchar('\n');

int dx4[] = {-1, 0, 1, 0};
int dy4[] = {0, 1, 0, -1};

int dx8[] = {-1, -1, 0, 1, 1, 1, 0, -1};
int dy8[] = {0, 1, 1, 1, 0, -1, -1, -1};

void Duxar(int _this_line) {
#ifndef ONLINE_JUDGE
	printf("\n . . . . . . . . . . . . . Passed line - %d\n", _this_line);
#endif
}

template <class T>
void ReadNo(T &_value) {
	T _sign = 1;
	char ch;
	_value = 0;
	while(!isdigit(ch = getchar())) {
		(ch == '-') && (_sign = -1);
	}
	do {
		_value = _value * 10 + (ch - '0');
	} while(isdigit(ch = getchar()));
	_value *= _sign;
}

int N, M, pw;
vector <int> values;

int BinarySearch(int val) {
	int aux, ans = 0, p;
	for (p = pw; p; p >>= 1) {
		aux = ans + p;
		if (aux <= N) {
			if (values[aux] <= val) {
				ans = aux;
			}
		}
	}
	return ans;
}


int main(){
	string file_input = "cautbin";
#ifdef INFOARENA
	freopen((file_input + ".in").c_str(), "r", stdin);
	freopen((file_input + ".out").c_str(), "w", stdout);
#else
#ifndef ONLINE_JUDGE
	freopen("input.cpp", "r", stdin);
#endif
#endif
	
	int i, pos, t, x;
	ReadNo(N);
	for (pw = 1; pw < N; pw <<= 1);
	values.resize(N + 1);
	for (i = 1; i <= N; ++i) {
		ReadNo(values[i]);
	}
	
	ReadNo(M);
	for (i = 0; i < M; ++i) {
		ReadNo(t); ReadNo(x);
		pos = BinarySearch(x);
		if (t == 0) {
			if (values[pos] != x) {
				pos = -1;
			}
			printf("%d\n", pos);
		}
		else if (t == 1) {
			printf("%d\n", pos);
		}
		else {
			if (values[pos] == x) {
				pos = BinarySearch(x - 1);
			}
			++pos;
			printf("%d\n", pos);
		}
	}
	
	return 0;
}