oj.uz

Submission #971273

# Submission time Handle Problem Language Result Execution time Memory
971273 2024-04-28T09:30:28 Z aryanc403 The Big Prize (IOI17_prize) C++17
100 / 100
 34 ms 2080 KB 
/*
  Compete against Yourself.
  Author - Aryan (@aryanc403)
*/
/*
  Credits -
  Atcoder library - https://atcoder.github.io/ac-library/production/document_en/ (namespace atcoder)
  Github source code of library - https://github.com/atcoder/ac-library/tree/master/atcoder
  https://codeforces.com/contest/4/submission/150120627
*/

#ifdef ARYANC403
    #include <header.h>
#else
    #pragma GCC optimize ("Ofast")
    // #pragma GCC target ("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx")
    #pragma GCC target ("sse,sse2,mmx")
    #pragma GCC optimize ("-ffloat-store")
    #include <bits/stdc++.h>
    #include <ext/pb_ds/assoc_container.hpp>
    #include <ext/pb_ds/tree_policy.hpp>
    #define dbg(args...) 42;
    #define endl "\n"
#endif

// y_combinator from @neal template https://codeforces.com/contest/1553/submission/123849801
// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2016/p0200r0.html
template<class Fun> class y_combinator_result {
    Fun fun_;
public:
    template<class T> explicit y_combinator_result(T &&fun): fun_(std::forward<T>(fun)) {}
    template<class ...Args> decltype(auto) operator()(Args &&...args) { return fun_(std::ref(*this), std::forward<Args>(args)...); }
};
template<class Fun> decltype(auto) y_combinator(Fun &&fun) { return y_combinator_result<std::decay_t<Fun>>(std::forward<Fun>(fun)); }

using namespace std;
#define fo(i,n)   for(i=0;i<(n);++i)
#define repA(i,j,n)   for(i=(j);i<=(n);++i)
#define repD(i,j,n)   for(i=(j);i>=(n);--i)
#define all(x) begin(x), end(x)
#define sz(x) ((lli)(x).size())
#define eb emplace_back
#define X first
#define Y second

using lli = long long int;
using mytype = long double;
using ii = pair<lli,lli>;
using vii = vector<ii>;
using vi = vector<lli>;

template <class T>
using ordered_set =  __gnu_pbds::tree<T,__gnu_pbds::null_type,less<T>,__gnu_pbds::rb_tree_tag,__gnu_pbds::tree_order_statistics_node_update>;
// X.find_by_order(k) return kth element. 0 indexed.
// X.order_of_key(k) returns count of elements strictly less than k.

// namespace Re = std::ranges;
// namespace Ve = std::ranges::views;

const lli SEED=chrono::steady_clock::now().time_since_epoch().count();
mt19937_64 rng(SEED);
inline lli rnd(lli l,lli r)
{return uniform_int_distribution<lli>(l,r)(rng);}

int find_best(int n);
std::vector<int> ask(int i);

const lli LIM = 4000;

int find_best(int n){
    const vector<int> bst = {0,0};
    if(n<=LIM){
        for(lli i=0;i<n;i++){
            if(ask(i)==bst)
                return i;
        }
    }

    map<lli,ii> dp;
    lli ans = -1;
    auto getVal = [&](const lli i)->ii{
        if(dp.count(i))
            return dp[i];
        const auto res = ask(i);
        dp[i]={res[0],res[1]};
        if(res==bst)
            ans=i;
        return dp[i];
    };

    lli mxVal=0;
    for(lli it=0;it<100;it++){
        const lli v=rnd(0,n-1);
        const auto res=getVal(v);
        mxVal=max(mxVal,res.X+res.Y);
    }

    y_combinator([&](const auto &self,lli l,lli r)->void{
        if(ans!=-1)
            return;
        while(l<=r){
            const auto res=getVal(l);
            if(res.X+res.Y>=mxVal)
                break;
            l++;
        }

        while(l<=r){
            const auto res=getVal(r);
            if(res.X+res.Y>=mxVal)
                break;
            r--;
        }

        if(l>r)
            return;
        if(getVal(l).X==getVal(r).X)
            return;
        if(r-l<=1)
            return;
        const lli mid = (l+r)/2;
        self(l,mid);
        self(mid,r);
    })(0,n-1);
    dbg(dp);
    assert(ans!=-1);
    return ans;
}

Compilation message

prize.cpp: In function 'int find_best(int)':
prize.cpp:22:26: warning: statement has no effect [-Wunused-value]
   22 |     #define dbg(args...) 42;
      |                          ^~
prize.cpp:125:5: note: in expansion of macro 'dbg'
  125 |     dbg(dp);
      |     ^~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 444 KB Output is correct
2 Correct 1 ms 448 KB Output is correct
3 Correct 2 ms 444 KB Output is correct
4 Correct 1 ms 448 KB Output is correct
5 Correct 1 ms 444 KB Output is correct
6 Correct 1 ms 440 KB Output is correct
7 Correct 1 ms 444 KB Output is correct
8 Correct 1 ms 448 KB Output is correct
9 Correct 1 ms 444 KB Output is correct
10 Correct 1 ms 440 KB Output is correct

Subtask #2
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 448 KB Output is correct
2 Correct 1 ms 440 KB Output is correct
3 Correct 1 ms 444 KB Output is correct
4 Correct 1 ms 444 KB Output is correct
5 Correct 1 ms 444 KB Output is correct
6 Correct 1 ms 448 KB Output is correct
7 Correct 1 ms 444 KB Output is correct
8 Correct 1 ms 440 KB Output is correct
9 Correct 1 ms 444 KB Output is correct
10 Correct 1 ms 440 KB Output is correct
11 Correct 2 ms 708 KB Output is correct
12 Correct 1 ms 440 KB Output is correct
13 Correct 4 ms 700 KB Output is correct
14 Correct 2 ms 440 KB Output is correct
15 Correct 4 ms 968 KB Output is correct
16 Correct 23 ms 1268 KB Output is correct
17 Correct 1 ms 440 KB Output is correct
18 Correct 24 ms 1036 KB Output is correct
19 Correct 1 ms 436 KB Output is correct
20 Correct 8 ms 1224 KB Output is correct
21 Correct 8 ms 1288 KB Output is correct
22 Correct 2 ms 712 KB Output is correct
23 Correct 1 ms 440 KB Output is correct
24 Correct 1 ms 448 KB Output is correct
25 Correct 12 ms 1568 KB Output is correct
26 Correct 12 ms 968 KB Output is correct
27 Correct 2 ms 444 KB Output is correct
28 Correct 19 ms 1100 KB Output is correct
29 Correct 16 ms 1112 KB Output is correct
30 Correct 34 ms 1820 KB Output is correct
31 Correct 1 ms 444 KB Output is correct
32 Correct 3 ms 700 KB Output is correct
33 Correct 0 ms 344 KB Output is correct
34 Correct 8 ms 700 KB Output is correct
35 Correct 1 ms 696 KB Output is correct
36 Correct 5 ms 988 KB Output is correct
37 Correct 2 ms 700 KB Output is correct
38 Correct 1 ms 444 KB Output is correct
39 Correct 14 ms 560 KB Output is correct
40 Correct 21 ms 1060 KB Output is correct
41 Correct 13 ms 1272 KB Output is correct
42 Correct 14 ms 1056 KB Output is correct
43 Correct 13 ms 1332 KB Output is correct
44 Correct 12 ms 1216 KB Output is correct
45 Correct 8 ms 1488 KB Output is correct
46 Correct 1 ms 436 KB Output is correct
47 Correct 12 ms 1244 KB Output is correct
48 Correct 18 ms 1260 KB Output is correct
49 Correct 2 ms 700 KB Output is correct
50 Correct 26 ms 1400 KB Output is correct
51 Correct 9 ms 1228 KB Output is correct
52 Correct 1 ms 444 KB Output is correct
53 Correct 1 ms 696 KB Output is correct
54 Correct 13 ms 1252 KB Output is correct
55 Correct 1 ms 436 KB Output is correct
56 Correct 34 ms 1428 KB Output is correct
57 Correct 15 ms 1368 KB Output is correct
58 Correct 24 ms 984 KB Output is correct
59 Correct 15 ms 2080 KB Output is correct
60 Correct 14 ms 1280 KB Output is correct
61 Correct 1 ms 448 KB Output is correct
62 Correct 1 ms 444 KB Output is correct
63 Correct 1 ms 440 KB Output is correct
64 Correct 1 ms 444 KB Output is correct
65 Correct 1 ms 444 KB Output is correct
66 Correct 3 ms 712 KB Output is correct
67 Correct 3 ms 472 KB Output is correct
68 Correct 2 ms 464 KB Output is correct
69 Correct 3 ms 884 KB Output is correct
70 Correct 2 ms 452 KB Output is correct
71 Correct 25 ms 1924 KB Output is correct
72 Correct 3 ms 724 KB Output is correct
73 Correct 33 ms 932 KB Output is correct
74 Correct 30 ms 952 KB Output is correct
75 Correct 1 ms 452 KB Output is correct
76 Correct 28 ms 1288 KB Output is correct
77 Correct 31 ms 1528 KB Output is correct
78 Correct 3 ms 440 KB Output is correct
79 Correct 13 ms 776 KB Output is correct
80 Correct 28 ms 712 KB Output is correct
81 Correct 29 ms 1488 KB Output is correct
82 Correct 31 ms 1756 KB Output is correct
83 Correct 1 ms 432 KB Output is correct
84 Correct 19 ms 1100 KB Output is correct
85 Correct 25 ms 956 KB Output is correct
86 Correct 4 ms 696 KB Output is correct
87 Correct 2 ms 696 KB Output is correct
88 Correct 6 ms 960 KB Output is correct
89 Correct 6 ms 696 KB Output is correct
90 Correct 1 ms 440 KB Output is correct
91 Correct 6 ms 952 KB Output is correct
92 Correct 1 ms 436 KB Output is correct
93 Correct 3 ms 952 KB Output is correct
94 Correct 3 ms 956 KB Output is correct
95 Correct 2 ms 460 KB Output is correct
96 Correct 2 ms 444 KB Output is correct
97 Correct 1 ms 444 KB Output is correct