Submission #555539

#	Time	Username	Problem	Language	Result	Execution time	Memory
555539		fuad27	Nekameleoni (COCI15_nekameleoni)	C++17	0 / 140	385 ms	3976 KiB

nekameleoni

#include<bits/stdc++.h>
using namespace std;
const int MAXN = 5010;
const int MAXK = 50;
vector<int> fen[50];
void update(int in, int val, int bt) {
	in++;
	while(in < MAXN) {
		fen[bt][in]+=val;
		in+=in&(-in);
	}
}
long long query(int l, int bt) {
	l++;
	long long sum = 0;
	while(l > 0) {
		sum+=fen[bt][l];
		l-=l&(-l);
	}
	return sum;
}
long long k;
bool check(int l, int r) {
	bool c = true;
	for(int i = 0;i<k;i++) {
		if(!(query(r, i) - query(l-1, i)))c = false;
	}	
	return c;
}
int main () {
	srand(time(NULL));
	long long n, m;
	cin >> n >> k >> m;
	for(int i = 0;i<50;i++) {
		fen[i].resize(MAXN);
	}
	long long arr[n];
	for(int i = 0;i<n;i++){
		cin >> arr[i];
		arr[i]--;
	}
	for(int i = 0;i<n;i++) {
		update(i, 1, arr[i]);
	}
	while(m--) {
		int type;
		cin >> type;
		if(type == 1) {
			int p, v;
			cin >> p >> v;
			v--;p--;
			update(p, -1, arr[p]);
			arr[p] = v;
			update(p, 1, arr[p]);
		}
		else {
			int p1 = 0, p2 = 0;
			int lo = k, hi = n;
			long long ans = 1e9;
			while(lo <= hi) {
				int mid = (lo+hi)/2;
				bool c = false;
				for(int j = 0;j<20;j++) {
					int l = rand()%(n-mid+1);
					int r = l+mid-1;
					if(check(l, r)){ans = min(ans, (long long)mid);c=true;}
				}
				if(c) {
					hi = mid-1;
				}
				else {
					lo = mid+1;
				}
			}
			if(ans == 1e9)ans = -1;
			cout << ans << "\n";
		}
	}
}

Compilation message (stderr)

nekameleoni.cpp: In function 'int main()':
nekameleoni.cpp:57:8: warning: unused variable 'p1' [-Wunused-variable]
   57 |    int p1 = 0, p2 = 0;
      |        ^~
nekameleoni.cpp:57:16: warning: unused variable 'p2' [-Wunused-variable]
   57 |    int p1 = 0, p2 = 0;
      |                ^~

• Subtask 1: 0 / 14
• Subtask 2: 0 / 14
• Subtask 3: 0 / 14
• Subtask 4: 0 / 14
• Subtask 5: 0 / 14
• Subtask 6: 0 / 14
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• Subtask 10: 0 / 14