結果

問題 No.1233 割り切れない気持ち
ユーザー satashun
提出日時 2020-09-18 21:46:22
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 90 ms / 3,153 ms
コード長 2,371 bytes
コンパイル時間 1,695 ms
コンパイル使用メモリ 199,400 KB
最終ジャッジ日時 2025-01-14 16:51:00
ジャッジサーバーID
(参考情報)
judge2 / judge1
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 2
other AC * 39
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pii = pair<int, int>;
template <class T>
using V = vector<T>;
template <class T>
using VV = V<V<T>>;
#define pb push_back
#define eb emplace_back
#define mp make_pair
#define fi first
#define se second
#define rep(i, n) rep2(i, 0, n)
#define rep2(i, m, n) for (int i = m; i < (n); i++)
#define per(i, b) per2(i, 0, b)
#define per2(i, a, b) for (int i = int(b) - 1; i >= int(a); i--)
#define ALL(c) (c).begin(), (c).end()
#define SZ(x) ((int)(x).size())
constexpr ll TEN(int n) { return (n == 0) ? 1 : 10 * TEN(n - 1); }
template <class T, class U>
void chmin(T& t, const U& u) {
if (t > u) t = u;
}
template <class T, class U>
void chmax(T& t, const U& u) {
if (t < u) t = u;
}
template <class T, class U>
ostream& operator<<(ostream& os, const pair<T, U>& p) {
os << "(" << p.first << "," << p.second << ")";
return os;
}
template <class T>
ostream& operator<<(ostream& os, const vector<T>& v) {
os << "{";
rep(i, v.size()) {
if (i) os << ",";
os << v[i];
}
os << "}";
return os;
}
#ifdef LOCAL
void debug_out() { cerr << endl; }
template <typename Head, typename... Tail>
void debug_out(Head H, Tail... T) {
cerr << " " << H;
debug_out(T...);
}
#define debug(...) \
cerr << __LINE__ << " [" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__)
#define dump(x) cerr << __LINE__ << " " << #x << " = " << (x) << endl
#else
#define debug(...) (void(0))
#define dump(x) (void(0))
#endif
const int MX = 200010;
int main() {
int N;
cin >> N;
V<int> A(N);
rep(i, N) cin >> A[i];
sort(ALL(A));
V<int> cnt(MX);
V<ll> csum(MX), psum(MX);
rep(i, N) cnt[A[i]]++;
rep(i, MX - 1) {
csum[i + 1] = csum[i] + cnt[i];
psum[i + 1] = psum[i] + cnt[i] * ll(i);
}
ll ans = 0;
for (int i = 1; i < MX; ++i) {
if (!cnt[i]) continue;
for (int j = i; j < MX; j += i) {
ll a = psum[min(MX - 1, j + i)] - psum[j] -
j * (csum[min(MX - 1, j + i)] - csum[j]);
ans += a * cnt[i];
}
}
int s = 0;
for (int i = N - 1; i >= 0;) {
int j = i;
while (j >= 0 && A[j] == A[i]) --j;
ans += (ll)A[i] * s * (i - j);
s += (i - j);
i = j;
}
cout << ans << endl;
return 0;
}
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