Submission #1775013

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Source Code Expand

#include <iostream>
#include <stdio.h>
#include <math.h>
#include <string.h>
#include <time.h>
#include <stdlib.h>
#include <string>
#include <bitset>
#include <vector>
#include <set>
#include <map>
#include <queue>
#include <algorithm>
#include <sstream>
#include <stack>
#include <iomanip>
using namespace std;
#define pb push_back
#define mp make_pair
typedef pair<int,int> pii;
typedef long long ll;
typedef double ld;
typedef vector<int> vi;
#define fi first
#define se second
#define fe first
#define FO(x) {freopen(#x".in","r",stdin);freopen(#x".out","w",stdout);}
#define Edg int M=0,fst[SZ],vb[SZ],nxt[SZ];void ad_de(int a,int b){++M;nxt[M]=fst[a];fst[a]=M;vb[M]=b;}void adde(int a,int b){ad_de(a,b);ad_de(b,a);}
#define Edgc int M=0,fst[SZ],vb[SZ],nxt[SZ],vc[SZ];void ad_de(int a,int b,int c){++M;nxt[M]=fst[a];fst[a]=M;vb[M]=b;vc[M]=c;}void adde(int a,int b,int c){ad_de(a,b,c);ad_de(b,a,c);}
#define es(x,e) (int e=fst[x];e;e=nxt[e])
#define esb(x,e,b) (int e=fst[x],b=vb[e];e;e=nxt[e],b=vb[e])
#define SZ 666666
int n,a[SZ],b[SZ],an=0,ff[SZ],ed=0;
map<int,int> id;
int gf(int x) {return ff[x]?ff[x]=gf(ff[x]):x;}
inline int al(int x)
{int&p=id[x]; if(!p) p=++an; return p;}
inline void uni(int a,int b)
{
	int ga=gf(a),gb=gf(b);
	if(ga^gb) ff[ga]=gb;
}
int main()
{
	scanf("%d",&n); int e=-1;
	for(int i=1;i<=n;++i)
		scanf("%d",a+i),a[0]^=a[i];
	for(int i=1;i<=n;++i)
		scanf("%d",b+i),b[0]^=b[i];
	for(int i=1;i<=n;++i)
		if(a[i]!=b[i]) uni(al(a[i]),al(b[i])),++e;
	al(a[0]); al(b[0]);
	for(int i=1;i<=an;++i) if(!ff[i]) ++e;
	sort(a,a+n+1); sort(b,b+n+1);
	for(int i=1;i<=n;++i)
		if(a[i]!=b[i]) {puts("-1"); return 0;}
	printf("%d\n",e);
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:45:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n); int e=-1;
                ^
./Main.cpp:47:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",a+i),a[0]^=a[i];
                             ^
./Main.cpp:49:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",b+i),b[0]^=b[i];
                             ^

Judge Result