HDU3294 Girls' research

//It is made by ljh2000
#include <iostream>
#include <cstdlib>
#include <cstring>
#include <cstdio>
#include <cmath>
#include <algorithm>
using namespace std;
typedef long long LL;
const int MAXN = 400011;
int len,n,cha,p[MAXN],ans;
char ch[MAXN],s[MAXN],H;
inline int getint(){
    int w=0,q=0; char c=getchar(); while((c<‘0‘||c>‘9‘) && c!=‘-‘) c=getchar();
    if(c==‘-‘) q=1,c=getchar(); while (c>=‘0‘&&c<=‘9‘) w=w*10+c-‘0‘,c=getchar(); return q?-w:w;
}

inline void manacher(){
	memset(p,0,sizeof(p)); int maxR=0,id=0;
	for(int i=1;i<=n;i++) {
		if(i<maxR) p[i]=min(p[2*id-i],maxR-i); else p[i]=1;
		for(;i+p[i]<=n && s[i-p[i]]==s[i+p[i]];p[i]++) ;
		if(i+p[i]>maxR) { maxR=i+p[i]; id=i; }
	}
}

inline void work(){
	while(scanf("%s",ch)!=EOF) {
		H=ch[0]; scanf("%s",ch); len=strlen(ch); n=1;
		cha=H-‘a‘; s[0]=‘%‘; s[1]=‘#‘;	   
		for(int i=0;i<len;i++) {
			ch[i]-=cha; if(ch[i]<‘a‘) ch[i]+=26;
			s[++n]=ch[i];
			s[++n]=‘#‘;
		}
		manacher(); ans=1; int pos=1;
		for(int i=1;i<=n;i++) if(p[i]>ans) ans=p[i],pos=i;
		ans--; if(ans==1) { printf("No solution!\n"); continue; }
		int l,r,mid;
		if(pos%2==0) { mid=pos/2-1; l=mid-ans/2; r=mid+ans/2; }
		else { mid=pos/2-1; l=mid-ans/2+1; r=mid+ans/2; }
		printf("%d %d\n",l,r);
		for(int i=l;i<=r;i++) printf("%c",ch[i]);
		printf("\n");
	}
}

int main()
{
    work();
    return 0;
}