Submission #1027860

#	Time	Username	Problem	Language	Result	Execution time	Memory
1027860		0npata	Vision Program (IOI19_vision)	C++17	44 / 100	1044 ms	2980 KiB

vision

#include "vision.h"
#include<bits/stdc++.h>

using namespace std;

#define vec vector

void construct_network(int H, int W, int K) {
	//cerr << H << ' ' << W << ' ' << K << '\n';

	auto dist = [&](int i, int j) {
		int x1 = i%W;
		int y1 = i/W;
		int x2 = j%W;
		int y2 = j/W;
		return abs(x1-x2)+abs(y1-y2);
	};

	vec<int> cand(0);
	vec<pair<int, int>> extra(0);
	for(int i = 0; i<H*W; i++) {
		vec<int> xor_check(0);
		for(int j = i+1; j<H*W; j++) {
			if(dist(i, j) == K) {
				xor_check.push_back(j);
//				cerr << "HERE" << '\n';
			}
		}
		if(xor_check.size() > 1) {
			add_xor(xor_check);
			cand.push_back(i);
		}
		else if(xor_check.size() == 1) {
			extra.push_back({i, xor_check[0]});
		}
	}

	for(int i = 0; i<cand.size(); i++) {
		add_and({cand[i], i+H*W});
	}
	for(auto [x, y] : extra) {
		add_and({x, y});
	}

//	cerr << "OK" << '\n';
	vec<int> or_check(cand.size()+extra.size());
//	cerr << cnt << '\n';
	iota(or_check.begin(), or_check.end(), H*W+cand.size());
	add_or(or_check);
}

Compilation message (stderr)

vision.cpp: In function 'void construct_network(int, int, int)':
vision.cpp:38:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   38 |  for(int i = 0; i<cand.size(); i++) {
      |                 ~^~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 11 / 11
• Subtask 3: 11 / 11
• Subtask 4: 0 / 15
• Subtask 5: 12 / 12
• Subtask 6: 0 / 8
• Subtask 7: 0 / 14
• Subtask 8: 0 / 19