Submission #479912

#	Time	Username	Problem	Language	Result	Execution time	Memory
479912		glome	Connecting Supertrees (IOI20_supertrees)	C++17	Compilation error	0 ms	0 KiB

supertrees

#include "supertrees.h"
#include <vector>
#include<bits/stdc++.h>

using namespace std;

int construct(std::vector<std::vector<int>> p) {
	set<int> s;
	bool ok = 1;
	for (int i = 0; i<p.size(); i++) {
		for (int j = 0; j<p.size(); j++) {
			ok &= p[i][j];
			s.insert(p[i][j]);
		}
	}
	if(ok) {
		vector<vector<int>> ans(p.size(), vector<int> (p.size()));
		for (int i = 0; i<p.size(); i++) {
			ans[i][i] = 0;
		}
		for (int i = 1; i<p.size(); i++) {
			ans[0][i] = 1;
			ans[i][0] = 1;
		}
		build(ans);
		return 1;
	}
	if(s.size() == 2) {
		vector<vector<int>> ans(p.size(), vector<int> (p.size(), 0))
		for (int i = 0; i<p.size(); i++) {
			for (int j = i + 1; j<p.size(); j++) {
				if(p[i][j] == 1) {
					ans[i][j] = 1;
					ans[j][i] = 1;
				}
			}
		}
		build(ans);
		return 1;
	}


}

Compilation message (stderr)

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:10:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   10 |  for (int i = 0; i<p.size(); i++) {
      |                  ~^~~~~~~~~
supertrees.cpp:11:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   11 |   for (int j = 0; j<p.size(); j++) {
      |                   ~^~~~~~~~~
supertrees.cpp:18:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   18 |   for (int i = 0; i<p.size(); i++) {
      |                   ~^~~~~~~~~
supertrees.cpp:21:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |   for (int i = 1; i<p.size(); i++) {
      |                   ~^~~~~~~~~
supertrees.cpp:30:3: error: expected ',' or ';' before 'for'
   30 |   for (int i = 0; i<p.size(); i++) {
      |   ^~~
supertrees.cpp:30:19: error: 'i' was not declared in this scope
   30 |   for (int i = 0; i<p.size(); i++) {
      |                   ^
supertrees.cpp:8:11: warning: control reaches end of non-void function [-Wreturn-type]
    8 |  set<int> s;
      |           ^