제출 #86576

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
86576		Pluton	Savrsen (COCI17_savrsen)	C++14	120 / 120	2193 ms	79128 KiB

savrsen

#include <bits/stdc++.h>
 
#define ld long double
#define ll long long
#define sz size()
#define all(xx) xx.begin(),xx.end()
#define pb push_back
#define in insert
#define er erase
#define S second
#define F first
#define pii pair <int, int>
#define to_be continue
#define mp make_pair
#define stop exit (0)
#define fname ""
#define speed ios_base::sync_with_stdio(0);cin.tie(0)
#define input freopen (fname".in", "r", stdin)
#define output freopen (fname".out", "w", stdout)
#define int ll
#define N 20000000
 
using namespace std;
 
const int inf = 1e9 + 123;
const ll INF = 1e18 + 123;
const double pi = acos (-1.0);
const ld eps = 1e-3;
 
int a, b, sum, f[N];
 
main ()
{
	speed;
	cin >> a >> b;
	f[1] = 1;
	for (int i = 2; i <= 1e7 + 123; i ++)
		f[i] = i - 1; 
	for (int i = 2; i <= 1e7 + 123; i ++)
	{
		for (int j = i + i; j <= 1e7 + 123; j += i)
		{
			f[j] -= i;
		}
	}
	for (int i = a; i <= b; i ++)                             
		sum += abs (f[i]);
	cout << sum;                 
}                                                 
//Coded by A....

컴파일 시 표준 에러 (stderr) 메시지

savrsen.cpp:32:7: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main ()
       ^

• Subtask 1: 120 / 120