project euler 169

Posted 2020-10-28 wuyuanyuan

project euler 169

题目链接：https://projecteuler.net/problem=169
参考题解：http://tieba.baidu.com/p/2738022069

#include<bits/stdc++.h>
using namespace std;
#define fi first
#define se second
#define mp make_pair
#define pb push_back
#define rep(i, a, b) for(int i=(a); i<(b); i++)
#define sz(x) (int)x.size()
#define de(x) cout<< #x<<" = "<<x<<endl
#define dd(x) cout<< #x<<" = "<<x<<" "
typedef __int128 ll;
typedef pair<int, int> pii;
typedef vector<int> vi;

map<ll, ll> vis;

ll solve(ll n) {
    if(n<0) return 0;
    if(n==0) return 1;
    if(vis.count(n)) return vis[n];
    if(n&1) return vis[n]=solve(n/2);
    return vis[n]=solve(n/2)+solve(n/2-1);
}

void print(ll x) {
    vi ans;
    while(x) {
        ans.pb(x%10);
        x/=10;
    }
    reverse(ans.begin(), ans.end());
    rep(i,0,sz(ans)) printf("%d",ans[i]);puts("");
}

int main() {
    ll x=1e12;
    ll n=x*x*10;
    print(n);
    ll ans=solve(n);
    print(ans);
    return 0;
}