Cod sursa(job #2763445)

Utilizator VanillaSoltan Marian Vanilla Data 14 iulie 2021 10:41:18
Problema Cautare binara Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 2.61 kb
#include <bits/stdc++.h>
#include <fstream>
using namespace std;
typedef long long int64;
typedef vector<int> vec;
typedef vector<int64> vec64;
  string __fname = "cautbin";
  ifstream in (__fname + ".in");
  ofstream out (__fname + ".out");
  #define cin in
  #define cout out
#define pii pair <int, int> 
#define pii64 pair <int64, int64>
#define ss cout << " ";
#define nn cout << "\n";
#define ct(x) cout << x;
#define cts(x) cout << x << " ";
#define ctn(x) cout << x << "\n";
#define db(x) cout << "> " << #x << ": " << x << "\n";
#define qr queries();
void solve(int);
void queries(){int n;cin >> n;for (int i = 1; i <= n; i++) solve(i);}
int64 ceildiv(int64 a, int64 b) {return a / b + !!(a % b);}
template<class T>T gcd (T a, T b){return (b ? gcd(b, a % b): a);}
template<class T>T lcm (T a, T b){return a * b / gcd(a, b);}
// // // // // // // // // // // // // // // // // // // // // // 
/*                  TEMPLATE - VANILLA                         */
// // // // // // // // // // // // // // // // // // // // // //
const int maxn = 200200;
const int64 mod = 1000000007;
const double pi = 3.14159265359;
const int ddx[] = {-1, -1, 0, 1, 1, 1, 0, -1};
const int ddy[] = {0, 1, 1, 1, 0, -1, -1, -1};
const int dx[] = {-1, 0, 1, 0};
const int dy[] = {0, 1, 0, -1};

void solve(int id){

    return;
}


int main(){
    ios_base::sync_with_stdio(0);cin.tie(0);
    int64 n;
    cin >> n;
    vec64 a (n);
    for (int i = 0; i < n; i++){
        cin >> a[i];
    }
    int64 m;
    cin >> m;
    while (m--) {
        int t,x;
        cin >> t >> x;
        int64 l = 0, r = n-1;
        int64 rs = -1;
        if (t == 0) {
            while (l <= r) {
                int64 mid = (l + r) / 2;
                if (a[mid] == x) {
                    l = mid + 1;
                    rs = mid + 1;
                }
                else if (a[mid] < x) {
                    l = mid + 1;
                }
                else {
                    r = mid - 1;
                }
            }
        }
        if (t == 1) {
            while (l <= r) {
                int64 mid = (l + r) / 2;
                if (a[mid] <= x) {
                    rs = mid + 1;
                    l = mid + 1;
                }
                else {
                    r = mid - 1;
                }
            }
        }
        if (t == 2) {
            while (l <= r) {
                int64 mid = (l + r) / 2;
                if (a[mid] >= x) {
                    rs = mid + 1;
                    r = mid - 1;
                }
                else {
                    l = mid + 1;
                }
            }
        }
        ctn(rs);
    }
    return 0;
}