Submission #701740

#	Time	Username	Problem	Language	Result	Execution time	Memory
701740		shmad	Progression (NOI20_progression)	C++17	24 / 100	3061 ms	30832 KiB

Progression

#pragma GCC optimize("O3", "unroll-loops") // "Ofast" 	
#pragma GCC target("avx2", "bmi", "bmi2", "lzcnt", "popcnt") 

#include <bits/stdc++.h>

#define int long long
#define vt vector
#define pb push_back
#define all(x) (x).begin(), (x).end()
#define sz(x) (int)(x).size()
#define f first
#define s second
#define dbg(x) cerr << #x << " = " << x << '\n'
#define bit(x, i) ((x) >> (i) & 1)

using namespace std;
using ll = long long;
using ld = long double;
using pii = pair<int, int>;

const int N = 1e6 + 5, mod = 1e9 + 7;
const ll inf = 1e18 + 7;
const ld eps = 1e-6;

int n, q, a[N];

vt<array<int, 5>> qr;

void solve () {
	cin >> n >> q;
	for (int i = 1; i <= n; i++) cin >> a[i];
	bool sub1 = 1;
	for (int i = 1; i <= q; i++) {
		int tp, l, r, s = -1, c = -1;
		cin >> tp >> l >> r;
		if (tp < 3) cin >> s >> c;
		qr.pb({tp, l, r, s, c});
	    sub1 &= (l == 1 && r == n);
	}
	if (sub1) {
		int ans = 1, cur = 1, k = a[2] - a[1];
	    for (int i = 1; i < n; i++) {
			if (a[i + 1] - a[i] == k) cur++;
			else {
				k = a[i + 1] - a[i];
				ans = max(ans, cur);
				cur = 2;
			}
	    }
	    ans = max(ans, cur);
		for (auto [tp, l, r, s, c]: qr) {
        	if (tp == 2) ans = n;
        	if (tp == 3) cout << ans << '\n'; 
        }
        return;
	}
	for (auto [tp, l, r, s, c]: qr) {
	    if (tp == 1) {
	    	for (int i = l; i <= r; i++) a[i] += (s + (i - l) * c);
	    }
	    if (tp == 2) {
			for (int i = l; i <= r; i++) a[i] = (s + (i - l) * c);
	    }
	    if (tp == 3) {
	    	if (l == r) {
	    		cout << "1\n";
	    		continue;
	    	}
	        int ans = 1, cur = 1, k = a[l + 1] - a[l];
	     	for (int i = l; i < r; i++) {
				if (a[i + 1] - a[i] == k) cur++;
				else {
					k = a[i + 1] - a[i];
					ans = max(ans, cur);
					cur = 2;
				}
	     	}
	     	ans = max(ans, cur);
	     	cout << ans << '\n';
	    }
	}
	cout << '\n';
}

bool testcases = 0;

signed main() {
#ifdef ONLINE_JUDGE
	freopen(".in", "r", stdin);
	freopen(".out", "w", stdout);
#endif
	cin.tie(0) -> sync_with_stdio(0);
	int test = 1;
	if (testcases) cin >> test;
	for (int cs = 1; cs <= test; cs++) {
		solve();
	}
}

• Subtask 1: 9 / 9
• Subtask 2: 15 / 15
• Subtask 3: 0 / 35
• Subtask 4: 0 / 11
• Subtask 5: 0 / 13
• Subtask 6: 0 / 17