Submission #316016

#	Time	Username	Problem	Language	Result	Execution time	Memory
316016		katearima	Connecting Supertrees (IOI20_supertrees)	C++14	100 / 100	255 ms	22364 KiB

supertrees

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

	for(i=0; i<n; i++){
		for(j=0;j<n; j++){
			if(i==j) continue;
			if(f[i]==f[j]){
				if(p[i][j]!=1) return 0;
			}
			else if(z[i]==z[j]){
				if(p[i][j]!=2 && C==true) return 0;
			}
			else{
			if(p[i][j]!=0) return 0;
		}
		}
	}
	build(ans);
	return 1;
}

Compilation message (stderr)

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:33:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |   for(int k=0; k<v.size()-1; k++){
      |                ~^~~~~~~~~~~
supertrees.cpp:53:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 |          for(int k=0; k<v.size(); k++){
      |                       ~^~~~~~~~~

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