Submission #564206

#	Time	Username	Problem	Language	Result	Execution time	Memory
564206		cheissmart	Misspelling (JOI22_misspelling)	C++14	100 / 100	856 ms	206684 KiB

misspelling

#include <bits/stdc++.h>
#define IO_OP ios::sync_with_stdio(0), cin.tie(0)
#define F first
#define S second
#define V vector
#define PB push_back
#define EB emplace_back
#define MP make_pair
#define SZ(v) int((v).size())
#define ALL(v) (v).begin(), (v).end()

using namespace std;

typedef long long ll;
typedef pair<int, int> pi;
typedef V<int> vi;

const int INF = 1e9 + 7, N = 5e5 + 7, M = 1e9 + 7;

void add(int& a, int b) {
	a += b;
	if(a >= M) a -= M;
}

V<pi> G[N];

struct DS {
	int sum;
	V<pi> pq;
	void upd(int pos, int val) {
		pq.PB({pos, val});
		add(sum, val);
	}
	void remove_less_than(int pos) {
		while(pq.size() && pq.back().F < pos) {
			add(sum, M - pq.back().S);
			pq.pop_back();
		}
	}
} ds[26][2];

signed main()
{
	IO_OP;

	int n, m;
	cin >> n >> m;
	for(int i = 0; i < m; i++) {
		int a, b;
		cin >> a >> b;
		a--, b--;
		assert(a != b);
		if(a < b) {
			G[a].EB(b, 1);
		} else {
			G[b].EB(a, 0);
		}
	}
	for(int c = 0; c < 26; c++)
		ds[c][0].upd(n - 1, 1);

	for(int i = n - 2; i >= 0; i--) {
		V<array<int, 3>> todo;

		int he = 0, be = 0;
		for(int c = 0; c < 26; c++)
			add(be, ds[c][0].sum), add(be, ds[c][1].sum);
		for(int c = 0; c < 26; c++) {
			if(c) add(he, ds[c - 1][0].sum), add(he, ds[c - 1][1].sum);
			add(be, M - ds[c][0].sum), add(be, M - ds[c][1].sum);
			todo.PB({c, 0, he});
			todo.PB({c, 1, be});
		}
		for(auto[c, tp, x]:todo)
			ds[c][tp].upd(i, x);
		for(auto[j, tp]:G[i])
			for(int c = 0; c < 26; c++)
				ds[c][tp].remove_less_than(j);
	}
	int ans = 0;
	for(int c = 0; c < 26; c++)
		add(ans, ds[c][0].sum), add(ans, ds[c][1].sum);

	cout << ans << '\n';

}

Compilation message (stderr)

misspelling.cpp: In function 'int main()':
misspelling.cpp:74:11: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   74 |   for(auto[c, tp, x]:todo)
      |           ^
misspelling.cpp:76:11: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   76 |   for(auto[j, tp]:G[i])
      |           ^

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