#include <bits/stdc++.h>
#define ll long long
#define pb push_back
#define mp make_pair
#define all(x) x.begin(), x.end()
#define F first
#define S second
using namespace std;
inline void boost(){
ios_base::sync_with_stdio(0);
cin.tie(0);
}
int dp[int(1e7) + 1];
inline void solve () {
//freopen("input.txt", "r", stdin);
//freopen("output.txt", "w", stdout);
boost ();
int a, b;
cin >> a >> b;
dp[1] = -1;
int k = 0;
for (int i = 2; i <= b; i ++) {
if (dp[i] == 0) {
dp[i] = 0;
//cout << i << " ";
}
for (int j = i + i; j <= b; j += i) {
dp[j] += i;
}
}
ll sum = 0;
for (int i = a; i <= b; i ++) {
sum += abs(i - dp[i] - 1) ;
//cout << i - dp[i] - 1 << " ";
}
cout << sum;
}
int main(){
int kolT = 1;
// cin >> kolT;
while (kolT) {
solve ();
kolT --;
}
exit(0);
}
Compilation message
savrsen.cpp: In function 'void solve()':
savrsen.cpp:24:6: warning: unused variable 'k' [-Wunused-variable]
int k = 0;
^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
380 KB |
Output is correct |
| 2 |
Correct |
2 ms |
468 KB |
Output is correct |
| 3 |
Correct |
5 ms |
804 KB |
Output is correct |
| 4 |
Correct |
1288 ms |
39604 KB |
Output is correct |
| 5 |
Correct |
1458 ms |
39652 KB |
Output is correct |
| 6 |
Correct |
1420 ms |
39656 KB |
Output is correct |
| 7 |
Correct |
1181 ms |
39656 KB |
Output is correct |
| 8 |
Correct |
157 ms |
39656 KB |
Output is correct |
