Submission #211970

#	Time	Username	Problem	Language	Result	Execution time	Memory
211970		tleontest1	Geppetto (COCI15_geppetto)	C++14	80 / 80	20 ms	20352 KiB

geppetto

#pragma GCC optimize ("O3")
#pragma GCC target ("sse4")

#include <bits/stdc++.h>

using namespace std;

typedef long long lo;
typedef pair< lo,lo > PII;

#define fi first
#define se second
#define mp make_pair
#define pb push_back
#define fio() ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)
#define FOR for(int i=1;i<=n;i++)
#define mid ((start+end)/2)
#define ort ((bas+son)/2)

const lo MAX = -1000000000000000000;
const lo MIN = 1000000000000000000;
const lo inf = 1000000000;
const lo KOK = 100000;
const lo LOG = 30;
const lo li = 500005;
const lo mod = 1000000007;

int n,m,b[li],a[li],k,flag,t,dp[(1<<21)+1];
int cev;
string s;
vector<int> v[li];

inline int f(int sira,int mask){
	int cevv=0;
	int no=0;
	if(sira>=n){
		//~ cout<<mask<<endl;
		return 1;
	}
	if(~dp[mask])return dp[mask];
	for(int i=0;i<(int)v[sira].size();i++){
		//~ cout<<v[sira][i]<<" : : "<<sira<<endl;
		if((mask&(1<<v[sira][i]))){no=1;break;}
	}
	if(no==0){
		cevv+=f(sira+1,(mask|(1<<sira)));
	}
	cevv+=f(sira+1,mask);
	return dp[mask]=cevv;
}

int main(void){
	memset(dp,-1,sizeof(dp));
	scanf("%d %d",&n,&m);
	for(int i=1;i<=m;i++){
		int x,y;
		scanf("%d %d",&x,&y);
		x--;
		y--;
		v[x].pb(y);
		v[y].pb(x);
	}
	printf("%d\n",f(0,0));
	return 0;
}

Compilation message (stderr)

geppetto.cpp: In function 'int main()':
geppetto.cpp:55:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d",&n,&m);
  ~~~~~^~~~~~~~~~~~~~~
geppetto.cpp:58:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d",&x,&y);
   ~~~~~^~~~~~~~~~~~~~~

• Subtask 1: 80 / 80