Submission #1051494

#	Time	Username	Problem	Language	Result	Execution time	Memory
1051494		mychecksedad	Vision Program (IOI19_vision)	C++17	100 / 100	40 ms	1464 KiB

vision

#include "vision.h"
#include<bits/stdc++.h>
using namespace std;
#define ll long long int
#define pb push_back
#define vi vector<int>
 
int n, m;
int last;
vector<int> D;
int c(int x, int y){
	return x * m + y;
}
void construct_network(int H, int W, int K) {
	n = H, m = W;
	last = n*m;
	vector<int> diag, diag2;
	for(int sum = 0; sum < n + m - 1; ++sum){
		vector<int> L;
		for(int i = 0; i < n; ++i){
			for(int j = m - 1; j >= 0; --j){
				if(j + i == sum){
					L.pb(c(i, j));
					// cout << i << ' ' << j << '\n';
				}
			}
		}

		if(L.empty()) continue;
		// cout << '\n';
		diag.pb(add_or(L));
	}
	for(int sum = -n-m; sum < n + m; ++sum){
		vector<int> L;
		for(int i = 0; i < n; ++i){
			for(int j = 0; j < m; ++j){
				if(i - j == sum){
					L.pb(c(i, j));
					// cout << i << ' ' << j << '\n';
				}
			}
		}
		// cout << '\n';
		if(L.empty()) continue;
		diag2.pb(add_or(L));
	}
	vector<int> diag_pref(diag.size());
	vector<int> diag_pref2(diag2.size());
	diag_pref[0] = diag[0];
	diag_pref2[0] = diag2[0];
	for(int i = 1; i < diag.size(); ++i){
		diag_pref[i] = add_or({diag_pref[i - 1], diag[i]});
	}
	for(int i = 1; i < diag2.size(); ++i){
		diag_pref2[i] = add_or({diag_pref2[i - 1], diag2[i]});
	}
	vector<int> F, G;
	for(int i = 0; i < diag.size(); ++i){
		// sum = i
		int j = i - K - 1;
		// cout << i << ' ' << j << '\n';
		if(j >= 0){
			F.pb(add_and({diag[i], diag_pref[j]}));
		}
		if(j >= 0){
			F.pb(add_and({diag2[i], diag_pref2[j]}));
		}
		j = i - K;
		if(j >= 0){
			G.pb(add_and({diag[i], diag_pref[j]}));
		}
		if(j >= 0){
			G.pb(add_and({diag2[i], diag_pref2[j]}));
		}
	}
	// cout << diag.size() << '\n';
	// cout << diag2.size() << '\n';
	if(F.empty()){
		add_or(G);
	}else{
		int x = add_or(G);
		int y = add_or(F);
		add_xor({x, y});
	}
}

Compilation message (stderr)

vision.cpp: In function 'void construct_network(int, int, int)':
vision.cpp:51:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   51 |  for(int i = 1; i < diag.size(); ++i){
      |                 ~~^~~~~~~~~~~~~
vision.cpp:54:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   54 |  for(int i = 1; i < diag2.size(); ++i){
      |                 ~~^~~~~~~~~~~~~~
vision.cpp:58:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   58 |  for(int i = 0; i < diag.size(); ++i){
      |                 ~~^~~~~~~~~~~~~

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