Submission #240935

#	Time	Username	Problem	Language	Result	Execution time	Memory
240935		SamAnd	Savrsen (COCI17_savrsen)	C++17	120 / 120	1048 ms	39548 KiB

savrsen

#include <bits/stdc++.h>
using namespace std;
#define m_p make_pair
#define all(x) (x).begin(),(x).end()
#define sz(x) ((int)(x).size())
#define fi first
#define se second
typedef long long ll;
mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());
mt19937 rnf(2106);
const int N = 10000007;

int u[N];

void solv()
{
    for (int i = 0; i < N; ++i)
        u[i] = i;
    for (int i = 1; i < N; ++i)
    {
        for (int j = i + i; j < N; j += i)
            u[j] -= i;
    }
    int l, r;
    scanf("%d%d", &l, &r);
    ll ans = 0;
    for (int i = l; i <= r; ++i)
        ans += abs(u[i]);
    printf("%lld\n", ans);
}

int main()
{
    #ifdef SOMETHING
    freopen("input.txt", "r", stdin);
    //freopen("output.txt", "w", stdout);
    #endif // SOMETHING
    //ios_base::sync_with_stdio(false), cin.tie(0);
    solv();
    return 0;
}

//while ((double)clock() / CLOCKS_PER_SEC <= 0.9){}

Compilation message (stderr)

savrsen.cpp: In function 'void solv()':
savrsen.cpp:25:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &l, &r);
     ~~~~~^~~~~~~~~~~~~~~~

• Subtask 1: 120 / 120