Submission #315843

#	Time	Username	Problem	Language	Result	Execution time	Memory
315843		katearima	Connecting Supertrees (IOI20_supertrees)	C++14	11 / 100	254 ms	22040 KiB

supertrees

#include "supertrees.h"
#include <iostream>
#include <bits/stdc++.h>
#include <vector>
using namespace std;
vector< vector<int> > c,p,t,ans;
vector<int> v;
int i,j,k;
int construct(vector<vector<int>> p) {
	int n = p.size();
	vector<vector<int>> ans;
	for(i=0; i<n; i++){
		for(j=0; j<n; j++){
			if(p[i][j]==3) return 0;
			if(p[i][j]!=p[j][i]) return 0;
		}
	}
	v.resize(n);
	for(i=0; i<n; i++) 	ans.push_back(v);
	v.clear();
	vector<int> f(n);
	
    for(i=0; i<n; i++){
    	bool InCycle=false;
    	if(f[i]==1) continue;
    	for(j=0; j<n; j++){
    		if(p[i][j]==1) {
    			if(f[j]==1) return 0;;
    			v.push_back(j);
    			f[j]=1;
			}
    		if(p[i][j]==2) InCycle=true;
    		
		}
		for(k=0; k<v.size()-1; k++){
			int a=v[k]; int b=v[k+1];
			ans[a][b]=ans[b][a]=1;
		}
		if(InCycle) c.push_back(v);
	    v.clear();
	    
	}
	vector<int> z(n);
	for(i=0;i<n; i++){
		if(z[i]==1) continue;
		for(j=0; j<n; j++){
			if(p[i][j]==0){
				if(z[i]==1) return 0;
				z[i]=1;
			}
		}
	}
	if(c.size()==2) return 0;
	k=c.size();
	if(k!=1){
		for(i=0; i<k; i++){
			int a=c[i][0]; int b=c[(i+1)%k][0];
			ans[a][b]=ans[b][a]=1;
		}
	}

	build(ans);
	return 1;
}

Compilation message (stderr)

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:35:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |   for(k=0; k<v.size()-1; k++){
      |            ~^~~~~~~~~~~

• Subtask 1: 11 / 11
• Subtask 2: 0 / 10
• Subtask 3: 0 / 19
• Subtask 4: 0 / 35
• Subtask 5: 0 / 21
• Subtask 6: 0 / 4