제출 #434819

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
434819	2021-06-21 21:00:25	magmag	Arranging Shoes (IOI19_shoes)	C++17	10 / 100	29 ms	7088 KiB

shoes

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#include "shoes.h"
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const int mxN = 1e5+3;
ll idx[mxN];
struct FenwickTree {
    ll tr[mxN];
    ll LSB(ll x) {
        return (x) & (-x);
    }
    void add(ll i) {
        for (; i < mxN; i += LSB(i))++tr[i];
    }
    ll rsq(ll i) {
        ll s = 0;
        for (; i > 0; i -= LSB(i))s += tr[i];
        return s;
    }
    ll rsq(ll i, ll j) {
        return rsq(j) - (i > 1 ? rsq(i-1) : 0);
    }
};
 
 
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