Submission #949554

#	Time	Username	Problem	Language	Result	Execution time	Memory
949554		gaga999	Cubeword (CEOI19_cubeword)	C++17	100 / 100	886 ms	25232 KiB

cubeword

#include <cstdio>
#include <stdio.h>
#include <iostream>
#include <math.h>
#include <vector>
#include <queue>
#include <stack>
#include <deque>
#include <algorithm>
#include <utility>
#include <set>
#include <map>
#include <stdlib.h>
#include <cstring>
#include <string.h>
#include <string>
#include <sstream>
#include <assert.h>
#include <climits>
#include <sstream>
#include <numeric>
#include <time.h>
#include <limits.h>
#include <list>
#include <bitset>
#include <unordered_map>
#include <unordered_set>
#include <random>
#include <iomanip>
#include <complex>
#include <chrono>
#include <fstream>
#include <functional>
#include <unistd.h>
// #pragma GCC optimize("Ofast,no-stack-protector")
// #pragma GCC optimize("O3,unroll-loops")
// #pragma GCC target("avx,avx2,bmi,bmi2,lzcnt,popcnt")
#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 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);
}
int ct[8][62][62], dp[8][62][62][62];
bool ok[8];

inline int gv(char c)
{
    if (isdigit(c))
        return c - '0';
    if ('a' <= c && c <= 'z')
        return c - 'a' + 10;
    return c - 'A' + 36;
}

signed main()
{
    int n;
    scanf("%d", &n);
    set<string> st[8][62][62];
    string s;
    char ss[15];
    for (int i = 0; i < n; i++)
    {
        scanf("%s", ss);
        int ln = strlen(ss);
        s = string(ss, ss + ln);
        for (char &c : s)
            c = gv(c);
        ok[ln -= 3] = 1;
        st[ln][s.front()][s.back()].insert(s);
        reverse(iter(s));
        st[ln][s.front()][s.back()].insert(s);
    }
    for (int l = 0; l < 8; l++)
        for (int i = 0; i < 62; i++)
            for (int j = 0; j < 62; j++)
                ct[l][i][j] = size(st[l][i][j]);
    int ans = 0;
    for (int l = 0; l < 8; l++)
    {
        if (!ok[l])
            continue;
        for (int i = 0; i < 62; i++)
        {
            for (int a = 0; a < 62; a++)
            {
                if (!ct[l][i][a])
                    continue;
                for (int b = 0; b < 62; b++)
                {
                    if (!ct[l][i][b])
                        continue;
                    for (int c = 0; c < 62; c++)
                    {
                        (dp[l][a][b][c] += 1ll * ct[l][i][a] * ct[l][i][b] % M * ct[l][i][c] % M) %= M;
                    }
                }
            }
        }
        for (int i = 0; i < 62; i++)
        {
            for (int a = 0; a < 62; a++)
            {
                for (int b = 0; b < 62; b++)
                {
                    for (int c = 0; c < 62; c++)
                    {
                        ans = (1ll * dp[l][a][b][c] * dp[l][a][b][i] % M * dp[l][i][c][a] % M * dp[l][i][c][b] + ans) % M;
                    }
                }
            }
        }
    }
    printf("%d\n", ans);
}

Compilation message (stderr)

cubeword.cpp: In function 'int main()':
cubeword.cpp:139:23: warning: array subscript has type 'char' [-Wchar-subscripts]
  139 |         st[ln][s.front()][s.back()].insert(s);
      |                ~~~~~~~^~
cubeword.cpp:139:33: warning: array subscript has type 'char' [-Wchar-subscripts]
  139 |         st[ln][s.front()][s.back()].insert(s);
      |                           ~~~~~~^~
cubeword.cpp:141:23: warning: array subscript has type 'char' [-Wchar-subscripts]
  141 |         st[ln][s.front()][s.back()].insert(s);
      |                ~~~~~~~^~
cubeword.cpp:141:33: warning: array subscript has type 'char' [-Wchar-subscripts]
  141 |         st[ln][s.front()][s.back()].insert(s);
      |                           ~~~~~~^~
cubeword.cpp:127:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  127 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
cubeword.cpp:133:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  133 |         scanf("%s", ss);
      |         ~~~~~^~~~~~~~~~

• Subtask 1: 21 / 21
• Subtask 2: 29 / 29
• Subtask 3: 34 / 34
• Subtask 4: 16 / 16