oj.uz

Submission #1037612

# Submission time Handle Problem Language Result Execution time Memory
1037612 2024-07-29T05:56:05 Z Forested The Big Prize (IOI17_prize) C++17
90 / 100
 61 ms 424 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;
        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 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

Subtask #2
70.0 / 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 0 ms 344 KB Output is correct
8 Correct 0 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 0 ms 344 KB Output is correct
13 Correct 3 ms 344 KB Output is correct
14 Correct 2 ms 344 KB Output is correct
15 Correct 3 ms 344 KB Output is correct
16 Correct 21 ms 340 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 19 ms 344 KB Output is correct
19 Correct 1 ms 344 KB Output is correct
20 Correct 7 ms 344 KB Output is correct
21 Correct 5 ms 344 KB Output is correct
22 Correct 1 ms 344 KB Output is correct
23 Correct 1 ms 344 KB Output is correct
24 Correct 1 ms 344 KB Output is correct
25 Correct 11 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 Correct 20 ms 344 KB Output is correct
29 Correct 15 ms 344 KB Output is correct
30 Correct 24 ms 344 KB Output is correct
31 Correct 1 ms 344 KB Output is correct
32 Correct 2 ms 344 KB Output is correct
33 Correct 0 ms 344 KB Output is correct
34 Correct 7 ms 344 KB Output is correct
35 Correct 1 ms 344 KB Output is correct
36 Correct 3 ms 344 KB Output is correct
37 Correct 1 ms 344 KB Output is correct
38 Correct 1 ms 424 KB Output is correct
39 Correct 9 ms 344 KB Output is correct
40 Correct 17 ms 344 KB Output is correct
41 Correct 13 ms 344 KB Output is correct
42 Correct 15 ms 344 KB Output is correct
43 Correct 16 ms 344 KB Output is correct
44 Correct 9 ms 344 KB Output is correct
45 Correct 7 ms 344 KB Output is correct
46 Correct 0 ms 424 KB Output is correct
47 Correct 13 ms 344 KB Output is correct
48 Correct 12 ms 344 KB Output is correct
49 Correct 2 ms 344 KB Output is correct
50 Correct 21 ms 344 KB Output is correct
51 Correct 6 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 8 ms 344 KB Output is correct
55 Correct 1 ms 344 KB Output is correct
56 Correct 22 ms 344 KB Output is correct
57 Correct 16 ms 344 KB Output is correct
58 Correct 12 ms 344 KB Output is correct
59 Correct 16 ms 344 KB Output is correct
60 Correct 15 ms 340 KB Output is correct
61 Correct 1 ms 344 KB Output is correct
62 Correct 0 ms 344 KB Output is correct
63 Correct 1 ms 344 KB Output is correct
64 Correct 1 ms 344 KB Output is correct
65 Correct 1 ms 344 KB Output is correct
66 Correct 3 ms 344 KB Output is correct
67 Correct 1 ms 344 KB Output is correct
68 Correct 1 ms 344 KB Output is correct
69 Correct 2 ms 344 KB Output is correct
70 Correct 1 ms 344 KB Output is correct
71 Correct 30 ms 344 KB Output is correct
72 Correct 2 ms 344 KB Output is correct
73 Correct 20 ms 344 KB Output is correct
74 Correct 14 ms 344 KB Output is correct
75 Correct 1 ms 344 KB Output is correct
76 Correct 14 ms 344 KB Output is correct
77 Correct 19 ms 344 KB Output is correct
78 Correct 2 ms 344 KB Output is correct
79 Correct 12 ms 344 KB Output is correct
80 Correct 18 ms 344 KB Output is correct
81 Correct 28 ms 344 KB Output is correct
82 Correct 32 ms 344 KB Output is correct
83 Correct 1 ms 344 KB Output is correct
84 Correct 30 ms 344 KB Output is correct
85 Correct 25 ms 344 KB Output is correct
86 Correct 5 ms 344 KB Output is correct
87 Correct 2 ms 344 KB Output is correct
88 Partially correct 42 ms 340 KB Partially correct - number of queries: 9137
89 Partially correct 61 ms 344 KB Partially correct - number of queries: 9202
90 Correct 1 ms 344 KB Output is correct
91 Partially correct 41 ms 344 KB Partially correct - number of queries: 9852
92 Correct 6 ms 344 KB Output is correct
93 Correct 2 ms 344 KB Output is correct
94 Correct 3 ms 344 KB Output is correct
95 Correct 2 ms 344 KB Output is correct
96 Correct 2 ms 344 KB Output is correct
97 Correct 1 ms 344 KB Output is correct