Example #1
0
void HLD::update(int x, int y)
{
	while(ntop[x] != ntop[y])
	{
		if( dept[ ntop[x] ] > dept[ ntop[y] ] ) swap(x,y);
		bit.update( dfsn[ ntop[y] ], dfsn[ y ], 1);
		y = fath[ ntop[y] ];
	}
	if( dept[x] > dept[y] ) swap(x,y);
	x = bson[x];
	bit.update( dfsn[x], dfsn[y], 1);
}
Example #2
0
int main(){
	ios_base::sync_with_stdio(0); cin.tie(0); 
	//freopen("d.in", "r", stdin);

	cin >> T;	
	while (T--){
		cin >> N;
		for (int i = 1 ; i <= N ; i++){
			cin >> A[i];
			B[i] = A[i];
		}
		
		sort(B + 1, B + N + 1);

		for (int i = 1 ; i <= N ; i++)
			ID[i] = lower_bound(B + 1, B + N + 1, A[i]) - B;

		S[N + 1] = 0;
		for (int i = N ; i >= 1 ; i--){
			S[i] = 1;
			if (ID[i] < ID[i + 1])
				S[i] += S[i + 1];
		}

		int sol = 0;
		BIT bit;

		for (int i = 1 ; i <= N ; i++){
			D[i] = 1;
			if (ID[i] > ID[i - 1])
				D[i] += D[i - 1];

			bit.update(ID[i], D[i]);

			int s = S[i] + bit.query(ID[i] - 1);

			if (sol < s)
				sol = s;
		}

		cout << sol << '\n';
	}

	return 0;
}
int main()
{
    scanf("%d%d", &n, &m);
    for (int i = 1; i <= m; ++i) {
        int s;
        scanf("%d", &s);
        sect[s].push_back(i);
    }
    for (int i = 1; i <= n; ++i) scanf("%d", &need[i]);
    scanf("%d", &k);
    for (int q = 0; q < k; ++q) {
        scanf("%d%d%d", &l[q], &r[q], &a[q]);
    }

    for (int i = 1; i <= n; ++i) {
        lo[i] = 0;
        hi[i] = k;
    }
    BIT bit;
    while (!terminated()){
        // clear tree
        bit.reset();

        // generate new check
        for (int i = 1; i <= n; ++i) {
            int mid = (lo[i]+hi[i])/2;
            check[mid].push_back(i);
        }

        for (int q = 0; q < k; ++q) {
            // apply query
            if (l[q] <= r[q]) {
                bit.update(l[q], a[q]);
                bit.update(r[q]+1, -a[q]);
            }
            else {
                bit.update(l[q], a[q]);
                bit.update(1, a[q]);
                bit.update(r[q]+1, -a[q]);
            }

            // check
            for (auto &v: check[q]) {
                long long sum = 0;
                for (auto &s: sect[v]) {
                    sum += bit.query(s);
                    if (sum >= need[v]) break;
                }
                if (sum >= need[v]) {
                    hi[v] = q;
                }
                else {
                    lo[v] = q+1;
                }
            }
            check[q].clear();
        }

    }

    for (int i = 1; i <= n; ++i) {
        if (lo[i] < k) printf("%d\n", lo[i]+1);
        else puts("NIE");
    }

    return 0;
}