oj.uz

Submission #709104

# Submission time Handle Problem Language Result Execution time Memory
709104 2023-03-13T06:23:26 Z zaneyu Password (RMI18_password) C++14
50 / 100
 462 ms 576 KB 
#include<bits/stdc++.h>
using namespace std;
using ll=long long;
using ld=long double;
using pii=pair<int,int>;
#define f first
#define s second
#define pb push_back
#define REP(i,n) for(int i=0;i<n;i++)
#define REP1(i,n) for(int i=1;i<=n;i++)
#define FILL(n,x) memset(n,x,sizeof(n))
#define ALL(_a) _a.begin(),_a.end()
#define sz(x) (int)x.size()
#define SORT_UNIQUE(c) (sort(c.begin(),c.end()),c.resize(distance(c.begin(),unique(c.begin(),c.end()))))
const ll maxn=500+5;
const ll maxlg=__lg(maxn)+2;
const ll INF64=4e18;
const int INF=0x3f3f3f3f;
const ll MOD=1e8+7;
const ld PI=acos(-1);
const ld eps=1e-4;
#define lowb(x) x&(-x)
#define MNTO(x,y) x=min(x,(__typeof__(x))y)
#define MXTO(x,y) x=max(x,(__typeof__(x))y)
int query(string str);
int N,S;
string rec(string pf,string sf,int cur){
	//cout<<pf<<' '<<sf<<' '<<cur<<'\n';
	bool hv=0;
	for(int i=cur;i<S;i++){
		string z=pf;
		z.pb(i+'a');
		z+=sf;
		if(sz(z)<=N and query(z)==sz(z)){
			hv=1;
			cur=i;
			break;
		}
	}

	if(!hv){
		//cout<<"NO\n";
		return "";
	}
	int a=1,b=N-sz(pf)-sz(sf);
	while(a<b){
		int m=(a+b+1)/2;
		string z=pf;
		REP(j,m) z.pb(cur+'a');
		z+=sf;
		if(sz(z)<=N and query(z)==sz(z)) a=m;
		else b=m-1;
	}
	string ans="";
	REP(x,a+1){
		string z;
		REP(y,a-x) z.pb(cur+'a');
		z+=sf;
		string tmp=rec(pf+ans,z,cur+1);
		ans+=tmp;
		ans.pb(cur+'a');
	}
	ans.pop_back();
	//cout<<pf<<' '<<sf<<' '<<cur;
	//cout<<"RETURNED: "<<ans<<'\n';
	return ans;
}
string guess(int n, int s){
	N=n,S=s;
	return rec("","",0);
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 208 KB Guessed the password with 142 queries.
2 Correct 3 ms 208 KB Guessed the password with 313 queries.

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 208 KB Guessed the password with 56 queries.
2 Correct 3 ms 208 KB Guessed the password with 155 queries.
3 Correct 1 ms 208 KB Guessed the password with 36 queries.
4 Correct 4 ms 296 KB Guessed the password with 327 queries.

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 98 ms 396 KB Guessed the password with 7926 queries.
2 Correct 125 ms 544 KB Guessed the password with 13657 queries.
3 Correct 230 ms 440 KB Guessed the password with 21254 queries.
4 Correct 321 ms 476 KB Guessed the password with 30631 queries.

Subtask #4
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 208 KB Guessed the password with 142 queries.
2 Correct 3 ms 208 KB Guessed the password with 313 queries.
3 Correct 1 ms 208 KB Guessed the password with 56 queries.
4 Correct 3 ms 208 KB Guessed the password with 155 queries.
5 Correct 1 ms 208 KB Guessed the password with 36 queries.
6 Correct 4 ms 296 KB Guessed the password with 327 queries.
7 Correct 98 ms 396 KB Guessed the password with 7926 queries.
8 Correct 125 ms 544 KB Guessed the password with 13657 queries.
9 Correct 230 ms 440 KB Guessed the password with 21254 queries.
10 Correct 321 ms 476 KB Guessed the password with 30631 queries.
11 Incorrect 462 ms 576 KB Could not guess the password with 50000 queries.
12 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 208 KB Guessed the password with 142 queries.
2 Correct 3 ms 208 KB Guessed the password with 313 queries.
3 Correct 1 ms 208 KB Guessed the password with 56 queries.
4 Correct 3 ms 208 KB Guessed the password with 155 queries.
5 Correct 1 ms 208 KB Guessed the password with 36 queries.
6 Correct 4 ms 296 KB Guessed the password with 327 queries.
7 Correct 98 ms 396 KB Guessed the password with 7926 queries.
8 Correct 125 ms 544 KB Guessed the password with 13657 queries.
9 Correct 230 ms 440 KB Guessed the password with 21254 queries.
10 Correct 321 ms 476 KB Guessed the password with 30631 queries.
11 Incorrect 462 ms 576 KB Could not guess the password with 50000 queries.
12 Halted 0 ms 0 KB -