Submission #221493

#	Time	Username	Problem	Language	Result	Execution time	Memory
221493		staniewzki	Wall (IOI14_wall)	C++14	61 / 100	3076 ms	13988 KiB

wall

#include "wall.h"

#include<bits/stdc++.h>
using namespace std;

#define REP(i, n) for(int i = 0; i < n; i++)
#define FOR(i, a, b) for(int i = a; i <= b; i++)
#define ST first
#define ND second
 
ostream& operator<<(ostream &out, string str) {
	for(char c : str) out << c;
	return out;
}
 
template<class L, class R> ostream& operator<<(ostream &out, pair<L, R> p) {
	return out << "(" << p.ST << ", " << p.ND << ")";
}
 
template<class T> auto operator<<(ostream &out, T a) -> decltype(a.begin(), out) {
	out << "{";
	for(auto it = a.begin(); it != a.end(); it = next(it))
		out << (it != a.begin() ? ", " : "") << *it;
	return out << "}";
}
 
void dump() { cerr << "\n"; }
template<class T, class... Ts> void dump(T a, Ts... x) {
	cerr << a << ", ";
	dump(x...);
}
 
#ifdef DEBUG
#  define debug(...) cerr << "[" #__VA_ARGS__ "]: ", dump(__VA_ARGS__)
#else
#  define debug(...) false
#endif
 
template<class T> int size(T && a) { return (int) a.size(); }
 
using LL = long long;
using PII = pair<int, int>;

void buildWall(int n, int k, int op[], int left[], int right[], int height[], int finalHeight[]){
	int block_size = 1000;
	int block_count = (n + block_size - 1) / block_size;
	vector<int> low(block_count), high(block_count, 1e5);

	auto update_block = [&](int q) {
		int l = block_size * q;
		int r = min(n, block_size * (q + 1));
		FOR(i, l, r - 1) {
			if(finalHeight[i] < low[q]) finalHeight[i] = low[q];
			if(finalHeight[i] > high[q]) finalHeight[i] = high[q];
		}
		low[q] = 0, high[q] = 1e5;
	};

	REP(i, k) {
		int left_block = left[i] / block_size;
		int right_block = right[i] / block_size;

		auto update_interval = [&](int l, int r) {
			FOR(j, l, r) {
				if(op[i] == 1 && finalHeight[j] < height[i]) finalHeight[j] = height[i];
				if(op[i] == 2 && finalHeight[j] > height[i]) finalHeight[j] = height[i];
			};
		};

		if(left_block == right_block) {
			update_block(left_block);
			update_interval(left[i], right[i]);
		}
		else {
			update_block(left_block);
			update_block(right_block);

			int next_block = block_size * (left_block + 1) - 1;
			update_interval(left[i], next_block);

			int prev_block = block_size * right_block;
			update_interval(prev_block, right[i]);
		}

		FOR(j, left_block + 1, right_block - 1) {
			if(op[i] == 1 && low[j] < height[i]) {
				low[j] = height[i];
				if(low[j] > high[j]) high[j] = low[j];
			}
			if(op[i] == 2 && high[j] > height[i]) {
				high[j] = height[i];
				if(low[j] > high[j]) low[j] = high[j];
			}
		}
	}

	REP(i, block_count) update_block(i);
}

• Subtask 1: 8 / 8
• Subtask 2: 24 / 24
• Subtask 3: 29 / 29
• Subtask 4: 0 / 39