Submission #61437

#	Time	Username	Problem	Language	Result	Execution time	Memory
61437		Mamnoon_Siam	Potemkin cycle (CEOI15_indcyc)	C++17	30 / 100	1085 ms	1684 KiB

indcyc

//#pragma GCC optimize("Ofast,unroll-loops,no-stack-protector")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")

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

#define debug(s) cout << #s << " = " << s << endl
#define all(v) (v).begin(), (v).end()
#define KeepUnique(v) (v).erase( unique(all(v)), v.end() )
#define MEMSET(ok, val) memset(ok, val, sizeof (ok))
#define PB push_back
#define endl '\n'
typedef long long ll;

inline int myrand(int l, int r) {
	int ret = rand(); ret <<= 15; ret ^= rand();
	if(ret < 0) ret = -ret; ret %= (r-l+1); ret += l;
	return ret;
}

template <typename F, typename S>
ostream& operator << (ostream& os, const pair< F, S>& p) {
	return os<<"(" <<p.first<<", "<<p.second<<")"; }

typedef pair<int, int> ii;

template<typename T> using min_pq =
	std::priority_queue<T, vector<T>, greater<T> >;

//int dx[] = {-1, +0, +1, +0};
//int dy[] = {+0, +1, +0, -1};

const int maxn = 1005;

int n, m;
bool ok[maxn][maxn];

int32_t main () {
	// freopen("in", "r", stdin);
    cin >> n >> m;
    for(int i = 0; i < m; i++) {
    	int u, v;
    	cin >> u >> v;
    	ok[u][v] = ok[v][u] = 1;
    }
    for(int i = 1; i <= n; i++) {
    	for(int j = 1; j <= n; j++) if(j != i) {
    		for(int k = 1; k <= n; k++) if(k != j and k != i) {
    			for(int l = 1; l <= n; l++) if(l != i and l != j and l != k) {
    				if(ok[i][j] && ok[j][k] && ok[k][l] && ok[l][i] && !ok[i][k] && !ok[j][l]) {
    					cout << i << ' ' << j << ' ' << k << ' ' << l << endl;
    					return 0;
    				}
    			}
    		}
    	}
    }
    cout << "no" << endl;
}

Compilation message (stderr)

indcyc.cpp: In function 'int myrand(int, int)':
indcyc.cpp:18:2: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
  if(ret < 0) ret = -ret; ret %= (r-l+1); ret += l;
  ^~
indcyc.cpp:18:26: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
  if(ret < 0) ret = -ret; ret %= (r-l+1); ret += l;
                          ^~~

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 0 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10