old_Range_Queries/Range_Chmin_Range_Min.cpp

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• Last update: 2022-07-19 22:14:43+09:00

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//Range Chmin Range Min
template <typename T>
struct lazy_segment_tree{
	int N;
	vector<T> ST;
	vector<T> lazy;
	lazy_segment_tree(int n){
		N = 1;
		while (N < n){
			N *= 2;
		}
		ST = vector<T>(N * 2 - 1, INF);
		lazy = vector<T>(N * 2 - 1, INF);
	}
	void eval(int i){
		if (i < N - 1){
			lazy[i * 2 + 1] = min(lazy[i * 2 + 1], lazy[i]);
			lazy[i * 2 + 2] = min(lazy[i * 2 + 2], lazy[i]);
		}
		ST[i] = min(ST[i], lazy[i]);
		lazy[i] = INF;
	}
	void range_chmin(int L, int R, T x, int i, int l, int r){
		eval(i);
		if (R <= l || r <= L){
			return;
		} else if (L <= l && r <= R){
			lazy[i] = x;
			eval(i);
		} else {
			int m = (l + r) / 2;
			range_chmin(L, R, x, i * 2 + 1, l, m);
			range_chmin(L, R, x, i * 2 + 2, m, r);
			ST[i] = min(ST[i * 2 + 1], ST[i * 2 + 2]);
		}
	}
	void range_chmin(int L, int R, T x){
		return range_chmin(L, R, x, 0, 0, N);
	}
	void chmin(int k, T x){
		return range_chmin(k, k + 1, x);
	}
	T range_min(int L, int R, int i, int l, int r){
		eval(i);
		if (R <= l || r <= L){
			return INF;
		} else if (L <= l && r <= R){
			return ST[i];
		} else {
			int m = (l + r) / 2;
			return min(range_min(L, R, i * 2 + 1, l, m), range_min(L, R, i * 2 + 2, m, r));
		}
	}
	T range_min(int L, int R){
		return range_min(L, R, 0, 0, N);
	}
	T operator [](int k){
		return range_min(k, k + 1);
	}
};

#line 1 "old_Range_Queries/Range_Chmin_Range_Min.cpp"
//Range Chmin Range Min
template <typename T>
struct lazy_segment_tree{
	int N;
	vector<T> ST;
	vector<T> lazy;
	lazy_segment_tree(int n){
		N = 1;
		while (N < n){
			N *= 2;
		}
		ST = vector<T>(N * 2 - 1, INF);
		lazy = vector<T>(N * 2 - 1, INF);
	}
	void eval(int i){
		if (i < N - 1){
			lazy[i * 2 + 1] = min(lazy[i * 2 + 1], lazy[i]);
			lazy[i * 2 + 2] = min(lazy[i * 2 + 2], lazy[i]);
		}
		ST[i] = min(ST[i], lazy[i]);
		lazy[i] = INF;
	}
	void range_chmin(int L, int R, T x, int i, int l, int r){
		eval(i);
		if (R <= l || r <= L){
			return;
		} else if (L <= l && r <= R){
			lazy[i] = x;
			eval(i);
		} else {
			int m = (l + r) / 2;
			range_chmin(L, R, x, i * 2 + 1, l, m);
			range_chmin(L, R, x, i * 2 + 2, m, r);
			ST[i] = min(ST[i * 2 + 1], ST[i * 2 + 2]);
		}
	}
	void range_chmin(int L, int R, T x){
		return range_chmin(L, R, x, 0, 0, N);
	}
	void chmin(int k, T x){
		return range_chmin(k, k + 1, x);
	}
	T range_min(int L, int R, int i, int l, int r){
		eval(i);
		if (R <= l || r <= L){
			return INF;
		} else if (L <= l && r <= R){
			return ST[i];
		} else {
			int m = (l + r) / 2;
			return min(range_min(L, R, i * 2 + 1, l, m), range_min(L, R, i * 2 + 2, m, r));
		}
	}
	T range_min(int L, int R){
		return range_min(L, R, 0, 0, N);
	}
	T operator [](int k){
		return range_min(k, k + 1);
	}
};

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