Submission #619159

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
619159	2022-08-02 10:18:44	TimDee	Arranging Shoes (IOI19_shoes)	C++17	100 / 100	566 ms	148928 KiB

shoes

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using namespace std;
#include <bits/stdc++.h>
#include "shoes.h"
using ll = long long;
struct BIT {
    vector<int> bit;  // binary indexed tree
    int n;
 
    BIT(int n) {
        this->n = n;
        bit.assign(n, 0);
    }
 
    BIT(vector<int> a) : BIT(a.size()) {
        for (size_t i = 0; i < a.size(); i++)
            add(i, a[i]);
    }
 
    int sum(int r) {
        int ret = 0;
        for (; r >= 0; r = (r & (r + 1)) - 1)
            ret += bit[r];
        return ret;
    }
 
    int sum(int l, int r) {
        return sum(r) - sum(l - 1);
    }
 
 
 
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• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 20 / 20
• Subtask 4: 15 / 15
• Subtask 5: 20 / 20
• Subtask 6: 15 / 15