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답안 #636432

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
636432 2022-08-29T09:13:40 Z dozer Savrsen (COCI17_savrsen) C++14
120 / 120
 1050 ms 78668 KB 
#include <bits/stdc++.h>
using namespace std;
#define fileio() freopen("input.txt", "r", stdin), freopen("output.txt", "w", stdout)
#define fastio() cin.tie(0), ios_base::sync_with_stdio(0)
#define sp " "
#define endl "\n"
#define pb push_back
#define pii pair<int , int>
#define st first
#define nd second
#define N 10000005
#define int long long


int sum[N];

int32_t main()
{
	fastio();

	int a, b;
	cin>>a>>b;

	for (int i = 1; i < N; i++)
	{
		for (int j = i * 2; j < N; j += i)
			sum[j] += i;
	}

	int ans = 0;
	for (int i = a; i < b + 1; i++)
	{
		int a = (i * (i + 1)) / 2;
		ans += abs(sum[i] - i);
	}
	cout<<ans<<endl;


	cerr<<"time taken : "<<(float)clock() / CLOCKS_PER_SEC<<" seconds\n";
}

Compilation message

savrsen.cpp: In function 'int32_t main()':
savrsen.cpp:33:7: warning: unused variable 'a' [-Wunused-variable]
   33 |   int a = (i * (i + 1)) / 2;
      |       ^

Subtask #1
120.0 / 120.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1010 ms 78580 KB Output is correct
2 Correct 1040 ms 78580 KB Output is correct
3 Correct 1033 ms 78576 KB Output is correct
4 Correct 1027 ms 78576 KB Output is correct
5 Correct 1029 ms 78588 KB Output is correct
6 Correct 1034 ms 78668 KB Output is correct
7 Correct 1050 ms 78580 KB Output is correct
8 Correct 1047 ms 78572 KB Output is correct