Submission #847023

#	Time	Username	Problem	Language	Result	Execution time	Memory
847023		12345678	Connecting Supertrees (IOI20_supertrees)	C++17	0 / 100	1 ms	348 KiB

supertrees

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

using namespace std;

const int nx=1e3+5;
int gc;
bool vs[nx];
vector<vector<int>> g(nx);

int construct(std::vector<std::vector<int>> p) {
	int n = p.size();
	vector<vector<int>> answer(n, vector<int> (n, 0));
	for (int i=0; i<n; i++)
    {
        if (!vs[i])
        {
            queue<int> q;
            q.push(i); vs[i]=1;
            while (!q.empty())
            {
                int x=q.front(); q.pop();
                g[gc].push_back(x);
                for (int j=0; j<n; j++) if (p[x][j]==2&&!vs[j]) q.push(j), vs[j]=1;
                for (int j=0; j<n; j++) if (p[j][x]==2&&!vs[j]) q.push(j), vs[j]=1;
            }
            for (auto x:g[gc]) for (auto y:g[gc]) if (p[x][y]==0) return 0;
            int s=g[gc].size();
            if (s==1) 
            {
                gc++;
                continue;
            }
            for (int j=0; j<g[gc].size(); j++) answer[g[gc][j]][g[gc][(j+1)%s]]=answer[g[gc][(j+1)%s]][g[gc][j]]=1;
            gc++;
        }
    }
	build(answer);
	return 1;
}

Compilation message (stderr)

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:34:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |             for (int j=0; j<g[gc].size(); j++) answer[g[gc][j]][g[gc][(j+1)%s]]=answer[g[gc][(j+1)%s]][g[gc][j]]=1;
      |                           ~^~~~~~~~~~~~~

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