Submission #554846

#	Time	Username	Problem	Language	Result	Execution time	Memory
554846		DanShaders	Misspelling (JOI22_misspelling)	C++17	28 / 100	135 ms	63792 KiB

misspelling

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
using namespace std;

namespace x = __gnu_pbds;
template <typename T>
using ordered_set = x::tree<T, x::null_type, less<T>, x::rb_tree_tag, x::tree_order_statistics_node_update>;

template <typename T>
using normal_queue = priority_queue<T, vector<T>, greater<>>;

#define all(x) begin(x), end(x)
#define sz(x) ((int) (x).size())
#define x first
#define y second
using ll = long long;
using ld = long double;

#define int ll

const int N = 210, C = 26, MOD = 1e9 + 7;

ll dp[N][N][C];
vector<tuple<int, int, bool>> a;

int pref[2][N][N];

signed main() {
	cin.tie(0)->sync_with_stdio(0);
	int n, m;
	cin >> n >> m;
	a.resize(m);
	for (int i = 0; i < m; ++i) {	
		int u, v;
		cin >> u >> v;
		--u, --v;
		a.push_back({min(u, v), max(u, v), u > v});
	}
	
	for (auto [x, y, inv] : a) {
		++pref[inv][x + 1][y + 1];
	}
	for (int i = 0; i < 2; ++i) {
		for (int x = 1; x <= n; ++x) {
			for (int y = 1; y <= n; ++y) {
				pref[i][x][y] += pref[i][x - 1][y] + pref[i][x][y - 1] - pref[i][x - 1][y - 1];
			}
		}
	}

	for (int i = 0; i < C; ++i) {
		dp[1][1][i] = 1;
	}
	for (int i = 1; i < n; ++i) {
		for (int j = 1; j <= i; ++j) {
			for (int c0 = 0; c0 < C; ++c0) {
				(dp[i + 1][j + 1][c0] += dp[i][j][c0]) %= MOD;
				int cnt0 = pref[0][i][n] - pref[0][i - j][n] - pref[0][i][i] + pref[0][i - j][i];
				int cnt1 = pref[1][i][n] - pref[1][i - j][n] - pref[1][i][i] + pref[1][i - j][i];
				bool flag0 = !cnt0, flag1 = !cnt1;
				for (int c1 = 0; c1 < c0 && flag0; ++c1) {
					(dp[i + 1][1][c1] += dp[i][j][c0]) %= MOD;
				}
				for (int c1 = c0 + 1; c1 < C && flag1; ++c1) {
					(dp[i + 1][1][c1] += dp[i][j][c0]) %= MOD;
				}
			}
		}
	}
	cout << accumulate(dp[n][0], dp[n + 1][0], 0ll) % MOD;
}

• Subtask 1: 8 / 8
• Subtask 2: 20 / 20
• Subtask 3: 0 / 29
• Subtask 4: 0 / 32
• Subtask 5: 0 / 11