This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include<bits/stdc++.h>
#include "supertrees.h"
#define ll int
#define ld long double
#define fs first
#define sc second
#define debug(y) cout<<y,exit(0)
using namespace std;
typedef pair<ll,ll> LL;
const ll N = 1e3 + 9;
const ll mod = 1e9 + 7;
const ll base = 31;
vector<vector<ll>> ans;
vector<LL> g1,g2;
ll n,ok[N];
int construct(vector<vector<int>> p){
n = p.size(); ans = p;
for (ll i = 0;i < n;i++){
for (ll j = 0;j < n;j++) ans[i][j] = 0;
}
for (ll i = 0;i < n;i++)
for (ll j = 0;j < n;j++) if (p[i][j] == 3) return 0;
for (ll i = 0;i < n;i++){
ll now = 0;
while(p[i][now] != 1) now++;
if (now != i){
if (p[i] != p[now]) return 0;
ans[now][i] = ans[i][now] = 1;
}
else ok[i] = 1;
}
for(ll i = 0;i < n;i++) if(ok[i]){
ll cc = 0;
while(!p[i][cc]) cc++;
for(ll j = 0;j < n;j++)
if((p[cc][j] == 0) ^ (p[i][j] == 0)) return 0;
if(cc == i){
ll now = i;
for(ll j = i + 1;j < n;j++)
if(ok[j] && p[i][j]){
ans[now][j] = 1; ans[j][now] = 1;
now = j;
}
else if(now != i && ans[now][i]) return 0;
else if (now != i){
ans[now][i] = ans[i][now] = 1;
}
}
}
build(ans);
return 1;
}
/*
int main(){
ios_base::sync_with_stdio(NULL); cin.tie(0); cout.tie(0);
#define task "test"
if (fopen(task".inp","r")){
freopen(task".inp","r",stdin);
//freopen(task".out","w",stdout);
}
ll sz; vector<vector<ll>> p;
cin>>sz;
for (ll i = 0;i < sz;i++){
vector<ll> tmp; ll x;
for (ll j = 0;j < sz;j++) cin>>x,tmp.push_back(x);
p.push_back(tmp);
}
cout<<construct(p)<<"\n";
}
*/
/* stuff you should look for
* int overflow, array bounds
* special cases (n=1?)
* do smth instead of nothing and stay organized
* WRITE STUFF DOWN
* DON'T GET STUCK ON ONE APPROACH
*/
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |