oj.uz

Submission #1037613

# Submission time Handle Problem Language Result Execution time Memory
1037613 2024-07-29T05:57:39 Z Forested The Big Prize (IOI17_prize) C++17
20 / 100
 52 ms 600 KB 
#include <bits/stdc++.h>
using namespace std;
using i32 = int;
using i64 = long long;
template <typename T>
using V = vector<T>;
template <typename T>
using VV = V<V<T>>;
template <typename T>
using VVV = V<VV<T>>;
template <typename T>
bool chmin(T &x, const T &y) {
    if (x > y) {
        x = y;
        return true;
    }
    return false;
}
template <typename T>
bool chmax(T &x, const T &y) {
    if (x < y) {
        x = y;
        return true;
    }
    return false;
}
#define OVERRIDE4(a, b, c, d, ...) d
#define REP2(i, n) for (i32 i = 0; i < (i32)(n); ++i)
#define REP3(i, l, r) for (i32 i = (i32)(l); i < (i32)(r); ++i)
#define REP(...) OVERRIDE4(__VA_ARGS__, REP3, REP2)(__VA_ARGS__)
#define PER2(i, n) for (i32 i = (i32)(n)-1; i >= 0; --i)
#define PER3(i, l, r) for (i32 i = (i32)(r)-1; i >= (i32)(l); --i)
#define PER(...) OVERRIDE4(__VA_ARGS__, PER3, PER2)(__VA_ARGS__)
#define LEN(x) (i32) size(x)
#define ALL(x) begin(x), end(x)

void dbg(i32 x) { cerr << x; }
void dbg(i64 x) { cerr << x; }
template <typename T, typename U>
void dbg(pair<T, U> p) {
    cerr << "(";
    dbg(p.first);
    cerr << ", ";
    dbg(p.second);
    cerr << ")";
}
template <typename T>
void dbg(V<T> arr) {
    cerr << "[";
    REP(i, LEN(arr)) {
        if (i) {
            cerr << ", ";
        }
        dbg(arr[i]);
    }
    cerr << "]";
}
void debug() { cerr << '\n'; }
template <typename Head, typename... Tail>
void debug(Head head, Tail... tail) {
    dbg(head);
    cerr << ", ";
    debug(tail...);
}
#ifdef DEBUGF
#define DBG(...)                       \
    do {                               \
        cerr << #__VA_ARGS__ << " : "; \
        debug(__VA_ARGS__);            \
    } while (false)
#else
#define DBG(...) (void)0
#endif

#include "prize.h"

pair<i32, i32> ask2(i32 x) {
    static i32 q;
    ++q;
    if (q == 10000) {
        assert(false);
    }
    V<i32> ret = ask(x);
    return pair<i32, i32>(ret[0], ret[1]);
}

i32 subtask_1(i32 n) {
    i32 ok = -1, ng = n - 1;
    while (ng - ok > 1) {
        i32 mid = (ok + ng) / 2;
        auto [l, r] = ask2(mid);
        if (r) {
            ok = mid;
        } else {
            ng = mid;
        }
    }
    return ng;
}

i32 find_best(i32 n) {
    mt19937 mt(random_device{}());
    i32 cands = 0;
    {
        uniform_int_distribution<> dist(0, n - 1);
        REP(i, 50) {
            auto [l, r] = ask2(dist(mt));
            chmax(cands, l + r);
        }
    }
    auto rec = [&](auto rec, i32 l, i32 r, i32 lc, i32 rc) -> i32 {
        i32 tc = cands - lc - rc;
        if (tc == 0) {
            return -1;
        }
        DBG(l, r, lc, rc);
        i32 mid = (l + r) / 2;
        if (r - l > 10) {
            uniform_int_distribution<> dist(l, r - 1);
            mid = dist(mt);
        }
        auto [lm, rm] = ask2(mid);
        DBG(mid, lm, rm);
        if (lm + rm == 0) {
            return mid;
        }
        if (lm + rm == cands) {
            i32 tmp = rec(rec, l, mid, lc, rm);
            if (tmp != -1) {
                return tmp;
            }
            return rec(rec, mid, r, lm, rc);
        }
        // to left
        if (lm != 0) {
            i32 x = mid - 1;
            while (x >= l) {
                auto [lx, rx] = ask2(x);
                if (lx + rx == 0) {
                    return x;
                }
                if (lx + rx == cands) {
                    i32 tmp = rec(rec, l, x, lc, rx);
                    if (tmp != -1) {
                        return tmp;
                    }
                    break;
                }
                if (lm == 0) {
                    break;
                }
                --x;
            }
        }
        // to right
        {
            i32 x = mid + 1;
            while (x < r) {
                auto [lx, rx] = ask2(x);
                if (lx + rx == 0) {
                    return x;
                }
                if (lx + rx == cands) {
                    i32 tmp = rec(rec, x + 1, r, lx, rc);
                    if (tmp != -1) {
                        return tmp;
                    }
                    break;
                }
                ++x;
            }
        }
        return -1;
    };
    i32 ans = rec(rec, 0, n, 0, 0);
    return ans;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 1 ms 344 KB Output is correct

Subtask #2
0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 2 ms 344 KB Output is correct
12 Correct 1 ms 344 KB Output is correct
13 Correct 3 ms 344 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 4 ms 444 KB Output is correct
16 Partially correct 28 ms 340 KB Partially correct - number of queries: 5019
17 Correct 1 ms 344 KB Output is correct
18 Partially correct 27 ms 424 KB Partially correct - number of queries: 6116
19 Correct 1 ms 344 KB Output is correct
20 Correct 7 ms 344 KB Output is correct
21 Correct 6 ms 344 KB Output is correct
22 Correct 2 ms 344 KB Output is correct
23 Correct 0 ms 344 KB Output is correct
24 Correct 1 ms 344 KB Output is correct
25 Correct 10 ms 344 KB Output is correct
26 Correct 11 ms 344 KB Output is correct
27 Correct 1 ms 344 KB Output is correct
28 Partially correct 32 ms 424 KB Partially correct - number of queries: 5129
29 Correct 23 ms 344 KB Output is correct
30 Partially correct 22 ms 344 KB Partially correct - number of queries: 5957
31 Correct 1 ms 344 KB Output is correct
32 Correct 3 ms 444 KB Output is correct
33 Correct 0 ms 344 KB Output is correct
34 Correct 8 ms 444 KB Output is correct
35 Correct 1 ms 344 KB Output is correct
36 Correct 8 ms 344 KB Output is correct
37 Correct 2 ms 344 KB Output is correct
38 Correct 1 ms 344 KB Output is correct
39 Correct 12 ms 344 KB Output is correct
40 Partially correct 29 ms 508 KB Partially correct - number of queries: 5226
41 Correct 10 ms 344 KB Output is correct
42 Correct 19 ms 344 KB Output is correct
43 Correct 17 ms 344 KB Output is correct
44 Correct 10 ms 344 KB Output is correct
45 Correct 11 ms 344 KB Output is correct
46 Correct 1 ms 344 KB Output is correct
47 Correct 10 ms 344 KB Output is correct
48 Correct 15 ms 344 KB Output is correct
49 Correct 2 ms 344 KB Output is correct
50 Partially correct 19 ms 344 KB Partially correct - number of queries: 5934
51 Correct 10 ms 344 KB Output is correct
52 Correct 1 ms 344 KB Output is correct
53 Correct 1 ms 344 KB Output is correct
54 Correct 11 ms 344 KB Output is correct
55 Correct 1 ms 344 KB Output is correct
56 Partially correct 28 ms 340 KB Partially correct - number of queries: 6062
57 Correct 11 ms 344 KB Output is correct
58 Correct 21 ms 344 KB Output is correct
59 Correct 15 ms 344 KB Output is correct
60 Correct 14 ms 344 KB Output is correct
61 Correct 1 ms 344 KB Output is correct
62 Correct 1 ms 600 KB Output is correct
63 Correct 1 ms 344 KB Output is correct
64 Correct 1 ms 428 KB Output is correct
65 Correct 1 ms 344 KB Output is correct
66 Correct 2 ms 344 KB Output is correct
67 Correct 1 ms 344 KB Output is correct
68 Correct 2 ms 344 KB Output is correct
69 Correct 2 ms 344 KB Output is correct
70 Correct 1 ms 424 KB Output is correct
71 Partially correct 40 ms 344 KB Partially correct - number of queries: 8121
72 Correct 5 ms 344 KB Output is correct
73 Partially correct 31 ms 344 KB Partially correct - number of queries: 8171
74 Partially correct 52 ms 344 KB Partially correct - number of queries: 8129
75 Correct 1 ms 344 KB Output is correct
76 Partially correct 29 ms 344 KB Partially correct - number of queries: 7119
77 Partially correct 44 ms 344 KB Partially correct - number of queries: 7789
78 Correct 4 ms 344 KB Output is correct
79 Correct 19 ms 344 KB Output is correct
80 Partially correct 37 ms 344 KB Partially correct - number of queries: 7782
81 Partially correct 35 ms 344 KB Partially correct - number of queries: 7823
82 Partially correct 38 ms 344 KB Partially correct - number of queries: 7771
83 Correct 2 ms 344 KB Output is correct
84 Partially correct 42 ms 592 KB Partially correct - number of queries: 6727
85 Partially correct 50 ms 344 KB Partially correct - number of queries: 7803
86 Runtime error 50 ms 424 KB Execution killed with signal 6
87 Halted 0 ms 0 KB -