제출 #878074

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
878074	2023-11-24 04:23:22	The_Samurai	Chessboard (IZhO18_chessboard)	C++17	47 / 100	2045 ms	11856 KiB

chessboard

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#include "bits/stdc++.h"
using namespace std;
using ll = long long;
const ll inf = 1e18;
struct Fenwick {
    vector<int> tree;
    int n;
    void init(int len) {
        n = len;
        tree.assign(n + 1, 0);
    }
    void update(int i, int v) {
        i++;
        while (i <= n) {
            tree[i] += v;
            i += i & (-i);
        }
    }
    int get(int i) {
        i++;
        int sum = 0;
        while (i > 0) {
            sum += tree[i];
            i -= i & (-i);
        }
        return sum;
 
 
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