Submission #1262120

#	Time	Username	Problem	Language	Result	Execution time	Memory
1262120		themaver1cks	Construction Project 2 (JOI24_ho_t2)	C++17	0 / 100	0 ms	324 KiB

Main

/**
｡∠(*・ω･)っ  ⌒ 由 ~    ((　,,・з・,,　))
 _Π_____。
/______/~＼
｜ 田田｜門｜
> love miku so muchhhh <3
**/
#include <bits/stdc++.h>
using namespace std;

#define fi first
#define se second
#define pb push_back
#define sz(x) (int)(x).size()
#define el "\n"

typedef long long ll;
typedef long double ld;
typedef pair<int,int> pii;
//
struct Query
{
    int t, x, y;
    char c;
    Query(int _t, int _x, int _y, char _c): t(_t), x(_x), y(_y), c(_c) {};
};
// var dec
const int maxn = 1e5 + 3;
const ll mod = 1e9 + 7;
int n, q;
string s;
// ds dec
vector <Query> queries;
//
namespace sub1
{
    bool condition()
    {
        return (max(n, q) <= 15);
    }
    //
    void solve()
    {
        vector <string> saved(q+1);
        for (int z=0; z<q; ++z)
        {
            int t = queries[z].t, x = queries[z].x, y = queries[z].y;
            char c = queries[z].c;
            if (t == 1)
            {
                s[x] = c;
            }
            else if (t == 2)
            {
                int d = y-x+1;
                int ans = 0;
                for (int mask=0; mask<(1<<d); ++mask)
                {
                    string temp = "";
                    int cnt = __builtin_popcount(mask);
                    if (cnt != 5) continue;
                    for (int j=0; j<d; ++j)
                    {
                        if (mask & (1<<j))
                        {
                            temp += s[x+j];
                        }
                    }
                    if (temp == "HSGQG") ans++;
                }
                cout << ans << el;
            }
            else
            {
                s = saved[x];
            }
            saved[z+1] = s;
        }
    }
}
//
namespace sub2
{
    bool condition()
    {
        return (n <= 1000 && q == 1 && queries[0].t == 2 && queries[0].x == 1 && queries[0].y == n);
    }
    //
    void solve()
    {
        string tdk = "HSGQG";
        vector <vector<ll>> dp(5, vector<ll>(n+3, 0));
        for (int i=1; i<=n; ++i)
        {
            for (int k=0; k<5; ++k)
            {
                int cnt = 0;
                if (k == 0 && s[i] == tdk[k]) dp[k][i] = 1;
                else if (s[i] == tdk[k])
                {
                    for (int j=i-1; j>=1; --j)
                    {
                        if (s[j] == tdk[k-1])
                        {
                            dp[k][i] += dp[k-1][j];
                            if (dp[k][i] > mod) dp[k][i] -= mod;
                        }
                    }
                }
            }
        }
//        for (int k=0; k<5; ++k)
//        {
//            cout << k << ": ";
//            for (int i=1; i<=n; ++i) cout << dp[k][i] << " ";
//            cout << el;
//        }
        ll ans = 0;
        for (int i=1; i<=n; ++i) (ans += dp[4][i]) %= mod;
        cout << ans << el;
    }
}
//
void solve()
{
    cin >> n >> q;
    cin >> s;
    s = "#" + s;
    for (int i=1; i<=q; ++i)
    {
        int t; cin >> t;
        if (t == 1)
        {
            int x;
            char c;
            cin >> x >> c;
            queries.pb(Query(1, x, -1, c));
        }
        else if (t == 2)
        {
            int x, y; cin >> x >> y;
            queries.pb(Query(2, x, y, '0'));
        }
        else
        {
            int x; cin >> x;
            queries.pb(Query(3, x, -1, '0'));
        }
    }
    if (sub2::condition()) sub2::solve();
    else sub1::solve();
}
//
int32_t main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    if (fopen("hsgqg.inp", "r"))
    {
        freopen("hsgqg.inp", "r", stdin);
        freopen("hsgqg.out", "w", stdout);
    }
    int t = 1;
//    cin >> t;
    while (t--) solve();
    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'int32_t main()':
Main.cpp:160:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  160 |         freopen("hsgqg.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:161:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  161 |         freopen("hsgqg.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 8
• Subtask 2: 0 / 16
• Subtask 3: 0 / 29
• Subtask 4: 0 / 47