Submission #593192

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
593192	2022-07-10 14:42:40	SeDunion	Diversity (CEOI21_diversity)	C++17	64 / 100	7049 ms	7628 KiB

diversity

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#include <iostream>
#include <cassert>
#include <iomanip>
#include <algorithm>
#include <string>
#include <bitset> 
#include <vector>
#include <cmath>
#include <deque>
#include <queue>
#include <stack>
#include <map>
#include <set>
#ifndef LOCAL
  #include <bits/stdc++.h>
  #define cerr if(false)cerr
#endif
 
using namespace std;
using ll = long long;
 
const int N = 3e5 + 66;
 
ll a[N], n;
 
ll pref[N];
/*
summa(a[i]*(a[i]+1)/2 + a[i]*pref[i-1]*(i+1) - a[i]*(pref[n-1]-pref[i])*i)
summa((a[i]^2+a[i])/2 + a[i]*pref[i-1]*i+a[i]*pref[i-1] - a[i]*(pref[n-1]-pref[i])*i)
 
 
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