제출 #706596

#제출 시각아이디문제언어결과실행 시간메모리
706596YugiHackerSavrsen (COCI17_savrsen)C++14
120 / 120
712 ms39444 KiB
#include<bits/stdc++.h>
#define el cout<<"\n"
#define f0(i,n) for(int i=0;i<n;++i)
#define f1(i,n) for(int i=1;i<=n;++i)
#define maxn 10000007
using namespace std;
int d[maxn];
main()
{
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    int a, b;
    cin >> a >> b;
    d[1] = 1;
    for (int i=2; i*i <= b; i++)
    {
        for (int j=i*i; j<=b; j+=i)
        {
            d[j] += i;
            if (j != i*i) d[j] += j/i;
        }
    }
    long long ans = 0;
    for (int i=a; i<=b; i++) ans += abs(d[i]+1-i);
    cout << ans;
}

컴파일 시 표준 에러 (stderr) 메시지

savrsen.cpp:8:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    8 | main()
      | ^~~~
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