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답안 #946330

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
946330 2024-03-14T13:54:01 Z jay_jayjay 커다란 상품 (IOI17_prize) C++14
99.75 / 100
 35 ms 2828 KB 
// {{{1
extern "C" int __lsan_is_turned_off() { return 1; };
#include <bits/stdc++.h>
using namespace std;

#include <ext/pb_ds/assoc_container.hpp>

#ifdef DEBUG
#define dprintf(args...) fprintf(stderr,args)
#endif
#ifndef DEBUG
#define dprintf(args...) 42
#endif
#define ll long long
#define all(x) (x).begin(),(x).end()

#define mod int(1e9+7)
#define inf 0x3f3f3f3f
#define infl 0x3f3f3f3f3f3f3f3f

void sleep(int x) { this_thread::sleep_for(chrono::seconds(x)); }
struct { template<typename T> operator T() { T x; cin>>x; return x; } } in;

struct __rng {
        mt19937_64 _rng;
        __rng() {
                ll ctime = chrono::high_resolution_clock::now().time_since_epoch().count();
                _rng = mt19937_64(ctime);
        }
        
        ll randint(ll l, ll h) {
                return uniform_int_distribution<int>(l,h)(_rng);
        }
} rng;
// 1}}}
#define rank rank2
// #define DBG

#define N 200000

vector<int> ask(int i);

#ifdef DBG
int n; vector<int> arr;
int q=0;
vector<int> ask(int i) {
        q++;
        int l=0,r=0;
        for(int j=0;j<i;j++)if(arr[j]<arr[i]) l++;
        for(int j=i+1;j<n;j++)if(arr[j]<arr[i])r++;
        return vector<int>{l,r};
}
#endif
int ans[N][2];
int best=-1;


void ask2(int i) {
        if(best == i) return;
        
        if(ans[i][0]+ans[i][1] == 0) {
                auto x = ask(i);
                ans[i][0] = x[0];
                ans[i][1] = x[1];
                if(ans[i][0]+ans[i][1] == 0) assert(best==-1), best &= i;
        }
}

int rank(int i) {
        ask2(i);
        return ans[i][0]+ans[i][1];
}

int right(int i) {
        ask2(i);
        return ans[i][1];
}



// lower rank is more rare
void solve(int l, int r) {
        if(best >= 0) return;
        if(right(l) == right(r)) return;
        if(r<l) return;
        if(l==r) return void(rank(l));
        while(rank(l) != rank(r)) {
                while(rank(l) < rank(r)) l++;
                while(rank(l) > rank(r)) r--;
        }
        
        int m=(l+r)/2;
        solve(l,m);
        solve(m,r);
}

int find_best(int n) {
        solve(0, n-1);
        assert(best >= 0);
        return best;
}

#ifdef DBG
int main() {
        n=in;arr.resize(n);for(auto&x:arr)x=in;
        
        int ans = find_best(n);
        printf("%d\n",ans);
        printf("q=%d\n",q);
        return arr[ans]!=1;
}
#endif

Compilation message

prize.cpp:22:73: warning: 'in' defined but not used [-Wunused-variable]
   22 | struct { template<typename T> operator T() { T x; cin>>x; return x; } } in;
      |                                                                         ^~

Subtask #1
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 448 KB Output is correct
2 Correct 1 ms 448 KB Output is correct
3 Correct 0 ms 448 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 448 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 448 KB Output is correct
8 Correct 0 ms 448 KB Output is correct
9 Correct 0 ms 452 KB Output is correct
10 Correct 0 ms 472 KB Output is correct

Subtask #2
79.75 / 80.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 444 KB Output is correct
2 Correct 0 ms 704 KB Output is correct
3 Correct 0 ms 452 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 1 ms 444 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 444 KB Output is correct
8 Correct 0 ms 448 KB Output is correct
9 Correct 0 ms 448 KB Output is correct
10 Correct 0 ms 472 KB Output is correct
11 Correct 2 ms 1156 KB Output is correct
12 Correct 1 ms 448 KB Output is correct
13 Correct 2 ms 1028 KB Output is correct
14 Correct 1 ms 448 KB Output is correct
15 Correct 3 ms 1080 KB Output is correct
16 Correct 20 ms 2492 KB Output is correct
17 Correct 0 ms 448 KB Output is correct
18 Correct 19 ms 2660 KB Output is correct
19 Correct 1 ms 448 KB Output is correct
20 Correct 6 ms 736 KB Output is correct
21 Correct 8 ms 1412 KB Output is correct
22 Correct 2 ms 788 KB Output is correct
23 Correct 1 ms 448 KB Output is correct
24 Correct 0 ms 448 KB Output is correct
25 Correct 11 ms 1664 KB Output is correct
26 Correct 12 ms 2232 KB Output is correct
27 Correct 1 ms 716 KB Output is correct
28 Correct 20 ms 2828 KB Output is correct
29 Correct 15 ms 2008 KB Output is correct
30 Correct 32 ms 2088 KB Output is correct
31 Correct 1 ms 448 KB Output is correct
32 Correct 2 ms 776 KB Output is correct
33 Correct 0 ms 344 KB Output is correct
34 Correct 7 ms 1480 KB Output is correct
35 Correct 1 ms 496 KB Output is correct
36 Correct 6 ms 1664 KB Output is correct
37 Correct 1 ms 496 KB Output is correct
38 Correct 0 ms 628 KB Output is correct
39 Correct 8 ms 1584 KB Output is correct
40 Correct 30 ms 2020 KB Output is correct
41 Correct 11 ms 1860 KB Output is correct
42 Correct 12 ms 1476 KB Output is correct
43 Correct 11 ms 1608 KB Output is correct
44 Correct 13 ms 1408 KB Output is correct
45 Correct 8 ms 1380 KB Output is correct
46 Correct 1 ms 860 KB Output is correct
47 Correct 8 ms 1628 KB Output is correct
48 Correct 16 ms 2388 KB Output is correct
49 Correct 2 ms 800 KB Output is correct
50 Correct 25 ms 1988 KB Output is correct
51 Correct 10 ms 1820 KB Output is correct
52 Correct 1 ms 484 KB Output is correct
53 Correct 1 ms 504 KB Output is correct
54 Correct 12 ms 1552 KB Output is correct
55 Correct 0 ms 448 KB Output is correct
56 Correct 26 ms 2820 KB Output is correct
57 Correct 15 ms 1788 KB Output is correct
58 Correct 16 ms 2064 KB Output is correct
59 Correct 13 ms 1984 KB Output is correct
60 Correct 11 ms 1716 KB Output is correct
61 Correct 1 ms 504 KB Output is correct
62 Correct 0 ms 452 KB Output is correct
63 Correct 1 ms 500 KB Output is correct
64 Correct 1 ms 500 KB Output is correct
65 Correct 1 ms 344 KB Output is correct
66 Correct 2 ms 344 KB Output is correct
67 Correct 2 ms 344 KB Output is correct
68 Correct 2 ms 456 KB Output is correct
69 Correct 2 ms 344 KB Output is correct
70 Correct 2 ms 344 KB Output is correct
71 Correct 24 ms 2764 KB Output is correct
72 Correct 2 ms 1400 KB Output is correct
73 Correct 26 ms 2088 KB Output is correct
74 Correct 29 ms 2076 KB Output is correct
75 Correct 1 ms 976 KB Output is correct
76 Correct 22 ms 2208 KB Output is correct
77 Partially correct 35 ms 2028 KB Partially correct - number of queries: 5025
78 Correct 2 ms 1088 KB Output is correct
79 Correct 12 ms 2652 KB Output is correct
80 Correct 25 ms 2444 KB Output is correct
81 Correct 21 ms 2688 KB Output is correct
82 Correct 26 ms 2628 KB Output is correct
83 Correct 1 ms 960 KB Output is correct
84 Correct 23 ms 2396 KB Output is correct
85 Correct 32 ms 1932 KB Output is correct
86 Correct 2 ms 956 KB Output is correct
87 Correct 1 ms 448 KB Output is correct
88 Correct 2 ms 956 KB Output is correct
89 Correct 2 ms 956 KB Output is correct
90 Correct 1 ms 448 KB Output is correct
91 Correct 1 ms 700 KB Output is correct
92 Correct 1 ms 444 KB Output is correct
93 Correct 2 ms 964 KB Output is correct
94 Correct 2 ms 744 KB Output is correct
95 Correct 2 ms 1328 KB Output is correct
96 Correct 2 ms 776 KB Output is correct
97 Correct 1 ms 472 KB Output is correct