莫名奇妙的编译错误，有没有哪位大佬能帮忙改一下不编译错误

#include<bits/stdc++.h>
typedef long long s64;
const int MaxN=2e5+5;
const int base=7;
const int mod1=1e9+7;
const int mod2=1e9+9;
struct hash_val
{
	int hash1,hash2;
	hash_val(){}
	hash_val(const int &a,const int &b):
		hash1(a),hash2(b){}
	inline bool operator ==(const hash_val &rhs)const
	{
		return hash1==rhs.hash1&&hash2==rhs.hash2;
	}
	inline hash_val operator *(const int &rhs)const
	{
		return hash_val(1LL * hash1 * rhs %mod1,1LL * hash2 *rhs%mod2);
	}
	inline hash_val operator *(const hash_val &rhs)const
	{
		return hash_val(1LL * hash1 * rhs.hash1%mod1,1LL * hash2 *rhs.hash2%mod2);
	}
	inline hash_val operator - (const hash_val &rhs)const
	{
		int res1=hash1-rhs.hash1;if(res1<0)res1+=mod1;
		int res2=hash2-rhs.hash2;if(res2<0)res2+=mod2;
		return hash_val(res1,res2);
	}
	inline hash_val operator + (const hash_val &rhs)const
	{
		int res1=hash1+rhs.hash1;if(res1>=mod1)res1-=mod1;
		int res2=hash2+rhs.hash2;if(res2>=mod2)res2-=mod2;
		return hash_val(res1,res2);
	}
}pre_s[26][MaxN],h_t[26],p[MaxN];
int n,m,totans,ans[MaxN],lst[26][MaxN];
char s[MaxN],t[MaxN];
bool vis[26];
inline hash_val get_hash(const int &l,const int &r,const int &c)
{
	return pre_s[c][r]-pre_s[c][l-1]*p[r-l+1];
}
int main()
{
	scanf("%d%d%s%s",&n,&m,s+1,t+1);
	if(n<m)
	{
		puts("0");
		return 0;
	}
	for(int i=0;i<26;i++)pre_s[i][0]=h_t[i]=hash_val(0,0);
	p[0]=hash_val(1,1);
	for(int i=1,c;i<=n;i++)
	{
		p[i]=p[i-1]*base;
		for(int j=0;j<26;j++)
		{
			lst[j][i]=lst[j][i-1];
			pre_s[j][i]=pre_s[j][i-1]*base;
		}
		c=s[i]-'a';
		lst[c][i]=i;
		pre_s[c][i]=pre_s[c][i]+1;
	}
	for(int i=1,c;i<=m;i++)
	{
		for(int j=0;j<26;j++)h_t[j]=h_t[j]*base;
		c=t[i]-'a';
		h_t[c]=h_t[c]+1;
	}
	bool flg;
	for(int st=1,ed=m;ed<=n;++st,++ed)
	{
		flg=true;
		memset(vis,0,sizeof(vis));
		for(int x=0,y;x<26;x++)
		if(lst[x][ed]>=st&&!vis[x])
		{
			y=t[lst[x][ed]-st+1]-'a';
			if(vis[y])flg=false;
			else if(!(get_hash(st,ed,x)==h_t[y]))flg=false;
			else if(!(get_hash(st,ed,y)==h_t[x]))flg=false;
			else vis[x]=vis[y]=true;
			if(!flg)break;
		}
		if(flg)ans[++totans]=st;
	}
	printf("%d\n",totans);
	for(int i=1;i<=totans;i++)printf("%d%c",ans[i],"\n"[i==totans]);
    return 0;
}