Submission #858865

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Source Code Expand

#include <iostream>
#include <iomanip>
#include <vector>
#include <algorithm>
#include <numeric>
#include <functional>
#include <cmath>
#include <queue>
#include <stack>
#include <set>
#include <map>
#include <sstream>
#include <string>
#define repd(i,a,b) for (int i=(int)(a);i<(int)(b);i++)
#define rep(i,n) repd(i,0,n)
#define all(x) (x).begin(),(x).end()
#define mod 1000000007
#define inf 2000000007
#define mp make_pair
#define pb push_back
typedef long long ll;
using namespace std;
template <typename T>
inline void output(T a, int p) {
    if(p) cout << fixed << setprecision(p)  << a << "\n";
    else cout << a << "\n";
}
// end of template


int main() {
    cin.tie(0);
    ios::sync_with_stdio(0);
    // source code
    int N;
    cin >> N;
    vector<ll> X(N);
    rep(i, N) cin >> X[i];
    ll L;
    cin >> L;
    vector<int> B(N);
    rep(i, N){
        int l = i + 1, r = N;
        while(r - l > 1){
            int mid = (l + r) / 2;
            if(X[mid] - X[i] <= L) l = mid;
            else r = mid;
        }
        B[i] = l;
    }
    
    // doubling
    int n = N;
    int logN = 1;
    while(n > 0) {
        n >>= 1;
        logN++;
    }
    vector<vector<int>> D(logN, vector<int>(N));
    D[0] = B;
    
    repd(i, 1, logN){
        rep(j, N){
            if (D[i - 1][j] == N) D[i][j] = N;
            else D[i][j] = D[i - 1][D[i - 1][j]];
        }
    }
    
    
    int Q;
    cin >> Q;
    vector<pair<int, int>> A(Q);
    rep(i, Q){
        int a, b;
        cin >> a >> b;
        if(a > b) swap(a, b);
        a--, b--;
        
        int ret = 1;
        for(int j = logN - 1; j >= 0; j--){
            if(D[j][a] < b){
                ret += 1 << j;
                a = D[j][a];
            }
        }
        output(ret, 0);
    }

    
    return 0;
}

Submission Info

Judge Result