oj.uz

Submission #971259

# Submission time Handle Problem Language Result Execution time Memory
971259 2024-04-28T09:17:59 Z aryanc403 The Big Prize (IOI17_prize) C++17
20 / 100
 1000 ms 1048576 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;
        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:123:5: note: in expansion of macro 'dbg'
  123 |     dbg(dp);
      |     ^~~

Subtask #1
20.0 / 20.0

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

Subtask #2
0 / 80.0

# 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 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 444 KB Output is correct
7 Correct 1 ms 600 KB Output is correct
8 Correct 1 ms 432 KB Output is correct
9 Correct 1 ms 448 KB Output is correct
10 Correct 1 ms 436 KB Output is correct
11 Correct 2 ms 700 KB Output is correct
12 Correct 1 ms 444 KB Output is correct
13 Correct 3 ms 476 KB Output is correct
14 Correct 2 ms 448 KB Output is correct
15 Correct 4 ms 972 KB Output is correct
16 Correct 21 ms 1128 KB Output is correct
17 Correct 1 ms 444 KB Output is correct
18 Correct 25 ms 1088 KB Output is correct
19 Correct 1 ms 612 KB Output is correct
20 Correct 6 ms 468 KB Output is correct
21 Correct 9 ms 972 KB Output is correct
22 Correct 2 ms 700 KB Output is correct
23 Correct 1 ms 444 KB Output is correct
24 Correct 1 ms 440 KB Output is correct
25 Correct 12 ms 1560 KB Output is correct
26 Correct 13 ms 1024 KB Output is correct
27 Correct 1 ms 440 KB Output is correct
28 Correct 24 ms 1596 KB Output is correct
29 Correct 17 ms 1344 KB Output is correct
30 Correct 26 ms 1152 KB Output is correct
31 Correct 1 ms 444 KB Output is correct
32 Correct 2 ms 456 KB Output is correct
33 Correct 0 ms 344 KB Output is correct
34 Correct 7 ms 992 KB Output is correct
35 Correct 2 ms 700 KB Output is correct
36 Correct 6 ms 1228 KB Output is correct
37 Correct 1 ms 448 KB Output is correct
38 Correct 1 ms 700 KB Output is correct
39 Correct 14 ms 748 KB Output is correct
40 Correct 25 ms 1020 KB Output is correct
41 Correct 14 ms 1748 KB Output is correct
42 Correct 15 ms 1220 KB Output is correct
43 Correct 12 ms 1496 KB Output is correct
44 Correct 10 ms 1272 KB Output is correct
45 Correct 9 ms 772 KB Output is correct
46 Correct 1 ms 440 KB Output is correct
47 Correct 11 ms 1036 KB Output is correct
48 Correct 17 ms 1024 KB Output is correct
49 Correct 2 ms 456 KB Output is correct
50 Correct 31 ms 1228 KB Output is correct
51 Correct 11 ms 1220 KB Output is correct
52 Correct 1 ms 440 KB Output is correct
53 Correct 1 ms 444 KB Output is correct
54 Correct 10 ms 1288 KB Output is correct
55 Correct 1 ms 448 KB Output is correct
56 Correct 24 ms 1060 KB Output is correct
57 Correct 22 ms 1004 KB Output is correct
58 Correct 17 ms 1552 KB Output is correct
59 Correct 14 ms 972 KB Output is correct
60 Correct 14 ms 1788 KB Output is correct
61 Correct 1 ms 440 KB Output is correct
62 Correct 1 ms 444 KB Output is correct
63 Correct 1 ms 444 KB Output is correct
64 Correct 1 ms 432 KB Output is correct
65 Correct 1 ms 440 KB Output is correct
66 Correct 3 ms 472 KB Output is correct
67 Correct 3 ms 972 KB Output is correct
68 Correct 3 ms 712 KB Output is correct
69 Correct 4 ms 704 KB Output is correct
70 Correct 2 ms 704 KB Output is correct
71 Correct 32 ms 1192 KB Output is correct
72 Correct 3 ms 472 KB Output is correct
73 Correct 26 ms 940 KB Output is correct
74 Correct 25 ms 1424 KB Output is correct
75 Correct 1 ms 456 KB Output is correct
76 Correct 20 ms 1596 KB Output is correct
77 Correct 22 ms 1756 KB Output is correct
78 Correct 3 ms 700 KB Output is correct
79 Correct 15 ms 1064 KB Output is correct
80 Correct 26 ms 1756 KB Output is correct
81 Correct 28 ms 972 KB Output is correct
82 Correct 31 ms 1468 KB Output is correct
83 Correct 1 ms 440 KB Output is correct
84 Correct 23 ms 1256 KB Output is correct
85 Correct 23 ms 1800 KB Output is correct
86 Execution timed out 1584 ms 1048576 KB Time limit exceeded
87 Halted 0 ms 0 KB -