Submission #545973

#	Time	Username	Problem	Language	Result	Execution time	Memory
545973		sliviu	Game (IOI13_game)	C++17	100 / 100	2904 ms	82160 KiB

game

#include "game.h"
#include <stdlib.h>

typedef long long ll;

static int R, C;

struct X_NODE {
	X_NODE(int s, int e) : s(s), e(e), left(NULL), right(NULL), value(0LL) {}
	int s, e;
	X_NODE* left, * right;
	ll value;
};

struct Y_NODE {
	Y_NODE() : left(NULL), right(NULL), xtree(1, C) {}
	Y_NODE* left, * right;
	X_NODE xtree;
} *root;

ll gcd2(ll x, ll y) {
	if (y == 0) return x;
	return gcd2(y, x % y);
}

void init(int r, int c) {
	R = r, C = c;
	root = new Y_NODE();
}

void update2(X_NODE* node, int q, ll k) {
	int s = node->s, e = node->e, m = (s + e) >> 1;
	if (s == e) {
		node->value = k;
		return;
	}
	X_NODE*& child = (q <= m ? node->left : node->right);
	if (child == NULL) {
		child = new X_NODE(q, q);
		(child)->value = k;
	}
	else if ((child)->s <= q && q <= (child)->e) {
		update2(child, q, k);
	}
	else {
		do {
			if (q <= m) e = m;
			else s = m + 1;
			m = (s + e) >> 1;
		} while ((q <= m) == ((child)->e <= m));
		X_NODE* nnode = new X_NODE(s, e);
		if ((child)->e <= m) nnode->left = child;
		else nnode->right = child;
		child = nnode;
		update2(child, q, k);
	}
	node->value = gcd2(
		node->left ? node->left->value : 0,
		node->right ? node->right->value : 0
	);
}

ll query2(X_NODE* node, int s, int e) {
	if (node == NULL || node->s > e || node->e < s) return 0;
	if (s <= node->s && node->e <= e) {
		return node->value;
	}
	return gcd2(query2(node->left, s, e), query2(node->right, s, e));
}

void update1(Y_NODE* node, int s, int e, int p, int q, ll k) {
	int m = (s + e) >> 1;
	if (s == e) {
		update2(&node->xtree, q, k);
		return;
	}
	if (p <= m) {
		if (node->left == NULL) node->left = new Y_NODE();
		update1(node->left, s, m, p, q, k);
	}
	else {
		if (node->right == NULL) node->right = new Y_NODE();
		update1(node->right, m + 1, e, p, q, k);
	}
	ll v = gcd2(
		node->left ? query2(&node->left->xtree, q, q) : 0,
		node->right ? query2(&node->right->xtree, q, q) : 0
	);
	update2(&node->xtree, q, v);
}

void update(int p, int q, ll k) {
	++p, ++q;
	update1(root, 1, R, p, q, k);
}

ll query1(Y_NODE* node, int s, int e, int p, int q, int u, int v) {
	if (node == NULL || s > u || e < p) return 0;
	if (p <= s && e <= u) return query2(&node->xtree, q, v);
	int m = (s + e) >> 1;
	return gcd2(
		query1(node->left, s, m, p, q, u, v),
		query1(node->right, m + 1, e, p, q, u, v)
	);
}

ll calculate(int p, int q, int u, int v) {
	++p, ++q, ++u, ++v;
	return query1(root, 1, R, p, q, u, v);
}

• Subtask 1: 10 / 10
• Subtask 2: 27 / 27
• Subtask 3: 26 / 26
• Subtask 4: 17 / 17
• Subtask 5: 20 / 20