48 lines
968 B
C++
48 lines
968 B
C++
#include <bits/stdc++.h>
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using namespace std;
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const int N = 11;
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//树状数组模板
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int tr[N];
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#define lowbit(x) (x & -x)
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void add(int x, int c) {
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for (int i = x; i <= N; i += lowbit(i)) tr[i] += c;
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}
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int sum(int x) {
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int res = 0;
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for (int i = x; i; i -= lowbit(i)) res += tr[i];
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return res;
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}
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void print() {
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for (int i = 1; i < N; i++)
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cout << sum(i) % 2 << " ";
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cout << "\n";
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}
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int main() {
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//本题的类似一维思路，不需要对树状数组进行初始化，因为基数组都是0
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//记录基数组到树状数组中
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// for (int i = 1; i < N; i++) add(i, a[i]);
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// 将2-4取反
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add(2, 1), add(4 + 1, -1);
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print();
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//将2-4再取一次反
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add(2, 1), add(4 + 1, -1);
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print();
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//将3-4再取一次反
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add(3, 1), add(4 + 1, -1);
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print();
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return 0;
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}
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/*
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输出:
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1 0 0 0 1 1 1 1 1 1
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1 1 1 1 1 1 1 1 1 1
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1 1 0 0 1 1 1 1 1 1
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*/ |