Submission #421555

#	Time	Username	Problem	Language	Result	Execution time	Memory
421555		OttoTheDino	Connecting Supertrees (IOI20_supertrees)	C++17	Compilation error	0 ms	0 KiB

supertrees

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

#define rep(i,s,e)                  for (int i = s; i <= e; ++i)
#define rrep(i,s,e)                 for (int i = s; i >= e; --i)
#define pb                          push_back
#define pf                          push_front
#define fi                          first
#define se                          second
#define all(a)                      a.begin(), a.end()
typedef long long ll;
typedef pair<int, int> ii;
typedef vector<ii> vii;
typedef vector<int> vi;
typedef vector<double> vd;
typedef vector<string> vs;
typedef vector<char> vc;
typedef vector<ll> vll;

int construct (vector<vi> p) {
    int n = p.size();

    int sup[n], tree[n], spec[n];
    memset(sup,-1,4*n), memset(tree,-1,4*n);

    rep (i,0,n-1) {
        if (sup[i]==-1) {
            bool two = 0;
            rep (j,0,n-1) {
                if (p[i][j]==3) return 0;
                if (p[i][j]==1 || p[i][j]==2) {
                    if (sup[i]==-1) sup[i] = sup[j] = j;
                    else sup[j] = sup[i];
                    if (p[i][j]==1) {
                        if (tree[i]==-1) tree[i] = tree[j] = j;
                        else tree[j] = tree[i];
                    }
                    else two = 1;
                }
                else if (i==j) return 0;
            }
            spec[sup[i]] = !two;
        }
        else if (tree[i]==-1) {
            rep (j,0,n-1) {
                if (p[i][j]==3) return 0;
                if (p[i][j]==1 || p[i][j]==2) {
                    if (p[sup[i]][j] != 1 && p[sup[i]][j] != 2) return 0;
                    if (p[i][j]==1) {
                        if (tree[i]==-1) tree[i] = tree[j] = j;
                        else tree[j] = tree[i];
                    }
                }
                else if (p[sup[i]][j]) return 0;
            }
        }
        else rep (j,0,n-1) if (p[tree[i]][j]!=p[i][j]) return 0;
    }

    int b[n][n]={};
    rep (i,0,n-1) {
        if (i==sup[i]) {
            int last = i;
            rep (j,0,n-1) {
                if (i==j) continue;
                if (j==tree[j]) {
                    if (spec[i]) continue;
                    b[j][last] = b[last][j] = 1;
                    last = j;
                }
                else b[j][tree[j]] = b[tree[j]][j] = 1;
            }
            if (last!=i && !spec[i]) b[last][i] = b[i][last] = 1;
        }
    }
        
    build(b);
    return 1;
}

Compilation message (stderr)

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:78:11: error: could not convert '(int (*)[n])(& b)' from 'int (*)[n]' to 'std::vector<std::vector<int> >'
   78 |     build(b);
      |           ^
      |           |
      |           int (*)[n]