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Submission #466895

# Submission time Handle Problem Language Result Execution time Memory
466895 2021-08-21T02:21:54 Z LptN21 Savrsen (COCI17_savrsen) C++14
120 / 120
 1350 ms 39412 KB 
#include <bits/stdc++.h>
using namespace std;
#define fastIO ios_base::sync_with_stdio(false), cin.tie(NULL), cout.tie(NULL)
#define PI acos(-1.0)
#define FF first
#define SS second
// vector
#define pb push_back
#define sz(v) int((v).size())
#define all(v) (v).begin(), (v).end()
#define lb lower_bound
#define ub upper_bound
// bit
#define CNTBIT(x) __builtin_popcount(x)
#define ODDBIT(x) __builtin_parity(x)
#define MASK(i) (1<<(i))
#define BIT(x, i) (((x)>>(i))&1)
#define SUBSET(big, small) (((big)&(small))==(small))
// typedef
typedef long long ll;
typedef long double ld;
typedef pair<int, int> ii;
/* CODE BELOW */
const int N=1e7+7, M=20;
const int MOD=1e9+7;
const int oo=1e9+7;

int n, m, k, t;

int p[N];

signed main() {
    //freopen("test.inp", "r", stdin);
    //freopen("test.out", "w", stdout);
    //fastIO;
    scanf("%d%d", &n, &m); n--;
    ll ans=0;
    for(int i=1;i<=m;i++) {
        for(int j=(n/i+1)*i;j<=m;j+=i) p[j]+=i;
        if(p[i]) ans+=abs(2*i-p[i]);
    }
    printf("%lld", ans);
    return 0;
}
/* stuff you should look for
    - int overflow, array bounds
    - special/edge cases (n=1?)
    - do smth instead of nothing and stay organized
    - WRITE STUFF DOWN
    - DONT JUST STICK ON ONE APPROACH
*/

Compilation message

savrsen.cpp: In function 'int main()':
savrsen.cpp:36:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   36 |     scanf("%d%d", &n, &m); n--;
      |     ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
120.0 / 120.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 2 ms 588 KB Output is correct
4 Correct 61 ms 316 KB Output is correct
5 Correct 1206 ms 35508 KB Output is correct
6 Correct 1350 ms 39412 KB Output is correct
7 Correct 1184 ms 35788 KB Output is correct
8 Correct 245 ms 10232 KB Output is correct