Submission #86471

#	Time	Username	Problem	Language	Result	Execution time	Memory
86471		NurstanDuisengaliev	Savrsen (COCI17_savrsen)	C++17	120 / 120	1458 ms	39656 KiB

savrsen

#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 (stderr)

savrsen.cpp: In function 'void solve()':
savrsen.cpp:24:6: warning: unused variable 'k' [-Wunused-variable]
  int k = 0;
      ^

• Subtask 1: 120 / 120