Submission #560831

#	Time	Username	Problem	Language	Result	Execution time	Memory
560831		8e7	Misspelling (JOI22_misspelling)	C++17	100 / 100	1361 ms	275548 KiB

misspelling

//Challenge: Accepted
#include <bits/stdc++.h>
using namespace std;
#ifdef zisk
void debug(){cout << endl;}
template<class T, class ... U> void debug(T a, U ... b){cout << a << " ", debug(b...);}
template<class T> void pary(T l, T r) {
	while (l != r) cout << *l << " ", l++;
	cout << endl;
}
#else
#define debug(...) 0
#define pary(...) 0
#endif
#define ll long long
#define maxn 500005
#define maxc 26
#define mod 1000000007
#define pii pair<int, int>
#define ff first
#define ss second
#define io ios_base::sync_with_stdio(0);cin.tie(0);
ll dp[maxn][maxc],pref[maxn][maxc];
int lim[maxn][2];
vector<int> s1[maxn], s2[maxn];

void madd(ll &u, ll v) {
	u = ((u + v) % mod + mod)%mod;
}
int main() {
	io
	int n, m;
	cin >> n >> m;
	multiset<int> v1, v2;
	for (int i = 0;i < m;i++) {
		int a, b;
		cin >> a >> b;
		if (a < b) {
			s2[a].push_back(a);
			s2[b].push_back(-a);
		} else {
			s1[b].push_back(b);
			s1[a].push_back(-b);
		}
	}
	for (int i = 1;i <= n;i++) {
		for (auto j:s1[i]) {
			if (j > 0) v1.insert(j);
			else v1.erase(v1.find(-j));
		}
		for (auto j:s2[i]) {
			if (j > 0) v2.insert(j);
			else v2.erase(v2.find(-j));
		}
		if (v1.size()) lim[i][0] = *prev(v1.end());
		if (v2.size()) lim[i][1] = *prev(v2.end());
	}
	for (int i = 0;i < maxc;i++) dp[0][i] = 1, pref[0][i] = i + 1;
	for (int i = 1;i < n;i++) {
		//debug(lim[i][0], lim[i][1]);
		for (int j = 0;j < maxc;j++) {
			if (j) {
				madd(dp[i][j], (pref[i-1][j-1] - (lim[i][1] > 0 ? pref[lim[i][1]-1][j-1] : 0) + mod));
			}
			if (j < maxc - 1) {
				madd(dp[i][j], pref[i-1][maxc-1] - pref[i-1][j] - 
				(lim[i][0] > 0 ? pref[lim[i][0]-1][maxc-1] - pref[lim[i][0]-1][j] : 0) + mod);
			}
			pref[i][j] = (dp[i][j] + (j ? pref[i][j-1] : 0))%mod;
		}
		//pary(dp[i], dp[i] + maxc);
		for (int j = 0;j < maxc;j++) madd(pref[i][j], pref[i-1][j]);
	}
	ll ans = (pref[n-1][maxc-1]) %mod;
	cout << ans << "\n";
}

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