Submission #966529

#	Time	Username	Problem	Language	Result	Execution time	Memory
966529		gaga999	Painting Walls (APIO20_paint)	C++17	100 / 100	308 ms	13908 KiB

paint

// #pragma GCC optimize("Ofast,no-stack-protector")
// #pragma GCC optimize("O3,unroll-loops")
// #pragma GCC target("avx,avx2,bmi,bmi2,lzcnt,popcnt")
#include <bits/stdc++.h>
#define lowbit(x) ((x) & -(x))
#define ml(a, b) ((1ll * (a) * (b)) % M)
#define tml(a, b) (a) = ((1ll * (a) * (b)) % M)
#define ad(a, b) ((0ll + (a) + (b)) % M)
#define tad(a, b) (a) = ((0ll + (a) + (b)) % M)
#define mi(a, b) ((0ll + M + (a) - (b)) % M)
#define tmi(a, b) (a) = ((0ll + M + (a) - (b)) % M)
#define tmin(a, b) (a) = min((a), (b))
#define tmax(a, b) (a) = max((a), (b))
#define iter(a) (a).begin(), (a).end()
#define riter(a) (a).rbegin(), (a).rend()
#define init(a, b) memset((a), (b), sizeof(a))
#define cpy(a, b) memcpy((a), (b), sizeof(a))
#define uni(a) a.resize(unique(iter(a)) - a.begin())
#define size(x) (int)x.size()
#define pb emplace_back
#define mpr make_pair
#define ls(i) ((i) << 1)
#define rs(i) ((i) << 1 | 1)
#define INF 0x3f3f3f3f
#define NIF 0xc0c0c0c0
#define eps 1e-9
#define F first
#define S second
#define AC cin.tie(0)->sync_with_stdio(0)
using namespace std;
typedef long long llt;
typedef __int128_t lll;
typedef pair<int, int> pii;
typedef pair<double, double> pdd;
typedef pair<llt, llt> pll;
typedef complex<double> cd;
// const int M = 998244353;

// random_device rm;
// mt19937 rg(rm());
// default_random_engine rg(rm());
// uniform_int_distribution<int> rd(INT_MIN, INT_MAX);
// uniform_real_distribution<double> rd(0, M_PI);

void db() { cerr << "\n"; }
template <class T, class... U>
void db(T a, U... b) { cerr << a << " ", db(b...); }

inline char gc()
{
    const static int SZ = 1 << 16;
    static char buf[SZ], *p1, *p2;
    if (p1 == p2 && (p2 = buf + fread(p1 = buf, 1, SZ, stdin), p1 == p2))
        return -1;
    return *p1++;
}
void rd() {}
template <typename T, typename... U>
void rd(T &x, U &...y)
{
    x = 0;
    bool f = 0;
    char c = gc();
    while (!isdigit(c))
        f ^= !(c ^ 45), c = gc();
    while (isdigit(c))
        x = (x << 1) + (x << 3) + (c ^ 48), c = gc();
    f && (x = -x), rd(y...);
}

template <typename T>
void prt(T x)
{
    if (x < 0)
        putchar('-'), x = -x;
    if (x > 9)
        prt(x / 10);
    putchar((x % 10) ^ 48);
}

const int N = 1e5 + 5;
vector<int> pl[N];
int dp[2][N], tim[N];
bool ok[N];

int minimumInstructions(
    int n, int m, int k, vector<int> C,
    vector<int> A, vector<vector<int>> B)
{
    for (int i = 0; i < m; i++)
        for (int j : B[i])
            pl[j].pb(i);
    for (int i = n - 1; i >= 0; i--)
    {
        for (int j : pl[C[i]])
        {
            dp[i & 1][j] =
                (tim[(j + 1) % m] == i + 1 ? dp[~i & 1][(j + 1) % m] : 0) + 1;
            if (dp[i & 1][j] >= m)
                ok[i] = 1;
            // db(i, j, dp[i & 1][j]);
        }
        for (int j : pl[C[i]])
            tim[j] = i;
    }
    // db("-------");
    //  for (int i = 0; i < n; i++)
    //      db(ok[i], i);
    if (!ok[0] || !ok[n - m])
        return -1;
    else if (n == m)
        return 1;
    int l = 0, r = m, ans = 1;
    for (int i = 0; i < n;)
    {
        while (i < r)
            if (ok[++i])
                l = i;
        if (l == r - m)
            return -1;
        ans++, r = l + m;
        if (r == n)
            return ans;
    }
    return -1;
}

• Subtask 1: 12 / 12
• Subtask 2: 15 / 15
• Subtask 3: 13 / 13
• Subtask 4: 23 / 23
• Subtask 5: 37 / 37