Submission #441924

#	Time	Username	Problem	Language	Result	Execution time	Memory
441924		PiejanVDC	Connecting Supertrees (IOI20_supertrees)	C++17	0 / 100	1 ms	292 KiB

supertrees

#include "supertrees.h"
#include <bits/stdc++.h>
using namespace std;

int construct(vector<vector<int>> p) {
    int n = p.size();
    vector<vector<int>>v(n,vector<int>(n,0));
    for(int i = 0 ; i < n-1 ; i++) {
        for(int j = i+1 ; j < n ; j++) {
            if(p[i][j]) {
                bool ok=true;
                stack<pair<int,int>>s;
                s.push({i,-1});
                while(!s.empty()) {
                    if(s.top().first == j)
                        ok=false; break;
                    for(int k = 0 ; k < n ; k++) {
                        if(k==s.top().first||k==s.top().second) continue;
                        if(v[s.top().first][k]) {
                            s.push({k,s.top().first});
                        }
                    }
                }
                if(ok) {
                    v[i][j]=1,v[j][i]=1;
                }
            }
        }
    }
    for(int i = 0 ; i < n ; i++) {
        for(int j = i+1 ; j < n ; j++) {
            if(!p[i][j]) {
                bool ok=true;
                stack<pair<int,int>>s;
                s.push({i,-1});
                while(!s.empty()) {
                    if(s.top().first == j)
                        ok=false; break;
                    for(int k = 0 ; k < n ; k++) {
                        if(k==s.top().first||k==s.top().second) continue;
                        if(v[s.top().first][k]) {
                            s.push({k,s.top().first});
                        }
                    }
                }
                if(!ok) {
                    return 0;
                }
            }
        }
    }
    build(v);
    return 1;
}

Compilation message (stderr)

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:15:21: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   15 |                     if(s.top().first == j)
      |                     ^~
supertrees.cpp:16:35: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   16 |                         ok=false; break;
      |                                   ^~~~~
supertrees.cpp:37:21: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   37 |                     if(s.top().first == j)
      |                     ^~
supertrees.cpp:38:35: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   38 |                         ok=false; break;
      |                                   ^~~~~

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