Submission #1769424

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Source Code Expand

#include<bits/stdc++.h>
#define vi vector<int>
#define vvi vector<vector<int> >
#define vl vector<ll>
#define vvl vector<vector<ll>>
#define vb vector<bool>
#define vc vector<char>
#define vs vector<string>
using ll = long long;
using ld =long double;
#define int ll
#define INF 1e9
#define EPS 0.0000000001
#define rep(i,n) for(int i=0;i<n;i++)
#define loop(i,s,n) for(int i=s;i<n;i++)
#define all(in) in.begin(), in.end()
template<class T, class S> void cmin(T &a, const S &b) { if (a > b)a = b; }
template<class T, class S> void cmax(T &a, const S &b) { if (a < b)a = b; }
#define MAX 9999999
using namespace std;
typedef pair<int, int> pii;
typedef pair<int,pii> piii;
#define mp make_pair
signed main(){
    int n; cin>>n;
    string niko="25";
    string s;
    int ans=0;
    map<int,int>mp;
    while(true){
        s+=niko;
        int num=stoi(s);
        if(num>n)break;
        int cnt=1;
        int res=num;
        while(true){
            cnt++;
            if(!mp[res]){
                ans++;
                mp[res]++;
            }
            res=num*cnt;
            if(res>n)break;
        }
    }
    cout<<ans<<endl;
}

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