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2 years ago
#include <bits/stdc++.h>
using namespace std;
int main() {
//输入+输出重定向
//freopen("../x.in", "r", stdin);
//freopen("../x.out", "w", stdout);
/**
2
i ; i << 1 (1 << i) | 1
*/
//关闭文件
//fclose(stdin);
//fclose(stdout);
return 0;
}