//Never stop trying
#include "supertrees.h"
#pragma GCC target ("avx2")
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")
#include <bits/stdc++.h>
using namespace std;
#define boost ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0)
typedef string str;
typedef long long ll;
//#define int ll
typedef double db;
typedef long double ld;
typedef pair<int, int> pi;
#define fi first
#define se second
typedef vector<int> vi;
typedef vector<pi> vpi;
typedef vector<str> vs;
typedef vector<ld> vd;
#define pb push_back
#define sz(x) (int)x.size()
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
#define endl "\n"
#define FOR(i,a,b) for (int i = (a); i < (b); ++i)
#define F0R(i,a) FOR(i,0,a)
#define ROF(i,a,b) for (int i = (b)-1; i >= (a); --i)
#define R0F(i,a) ROF(i,0,a)
const int MOD = 1e9 + 7; //998244353
const ll INF = 1e18;
const int MX = 1001;
const int nx[4] = {0, 0, 1, -1}, ny[4] = {1, -1, 0, 0}; //right left down up
template<class T> using V = vector<T>;
template<class T> bool ckmin(T& a, const T& b) { return a > b ? a = b, 1 : 0; }
template<class T> bool ckmax(T& a, const T& b) { return a < b ? a = b, 1 : 0; }
ll cdiv(ll a, ll b) { return a / b + ((a ^ b) > 0 && a % b); } // divide a by b rounded up
constexpr int log2(int x) { return 31 - __builtin_clz(x); } // floor(log2(x))
#define dbg(x) cerr << " - " << #x << " : " << x << endl;
#define dbgs(x,y) cerr << " - " << #x << " : " << x << " / " << #y << " : " << y << endl;
#define dbgv(v) cerr << " - " << #v << " : " << endl << "[ "; for(auto it : v) cerr << it << ' '; cerr << ']' << endl;
void IO() {
#ifndef ONLINE_JUDGE
freopen("input.txt", "r", stdin);
freopen("output.txt", "w", stdout);
#endif
}
int N;
int p[MX][MX];
bool sub1(){
FOR(i,0,N) FOR(j,0,N) if(p[i][j]!=1) return 0;
return 1;
}
int construct(vector<vi> P) {
N=sz(P[0]);
int res[N][N],ans;
FOR(i,0,N) FOR(j,0,N) p[i][j]=P[i][j],res[i][j]=0;
if(sub1()){
FOR(i,0,N-1) res[i][i+1]=res[i+1][i]=1;
ans=1;
}
build(res);
/*FOR(i,0,N){
FOR(j,0,N) cout << res[i][j] << ' ';
cout << endl;
}*/
return ans;
}
int main() {
boost;
cin>>N;
vector<vi> a(N,vi(N,-1));
FOR(i,0,N) FOR(j,0,N) cin>>a[i][j];
/*FOR(i,0,N){
FOR(j,0,N) cout << a[i][j] << ' ';
cout << endl;
}*/
cout << construct(a) << endl;
return 0;
}
/* Careful!!!
.Array bounds
.Infinite loops
.Uninitialized variables / empty containers
.Order of input
Some insights:
.Binary search
.Graph representation
.Write brute force code
.Change your approach
*/
Compilation message
supertrees.cpp:4: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
4 | #pragma GCC optimization ("O3")
|
supertrees.cpp:5: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
5 | #pragma GCC optimization ("unroll-loops")
|
supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:77:8: error: could not convert '(int (*)[N])(& res)' from 'int (*)[N]' to 'std::vector<std::vector<int> >'
77 | build(res);
| ^~~
| |
| int (*)[N]
supertrees.cpp: In function 'void IO()':
supertrees.cpp:51:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
51 | freopen("input.txt", "r", stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
supertrees.cpp:52:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
52 | freopen("output.txt", "w", stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
