四连测Day2

题解和题看这里

#include<bits/stdc++.h>
using namespace std;
#define Q 137
#define mod 19260817
#define Mod 20172101
#define ll long long
ll hsh1[100010];
ll hsh2[100010];
ll m1[100010];
ll m2[100010];
char s[100010];
int q,u,v;
int check(int l)
{
    if(l==0) return 1;
    int valu,valv;
    valu=((hsh1[u+l-1]-hsh1[u-1]*m1[l])%mod+mod)%mod;
    valv=((hsh1[v+l-1]-hsh1[v-1]*m1[l])%mod+mod)%mod;
    if(valu!=valv) return 0;
    valu=((hsh2[u+l-1]-hsh2[u-1]*m2[l])%Mod+Mod)%Mod;
    valv=((hsh2[v+l-1]-hsh2[v-1]*m2[l])%Mod+Mod)%Mod;
    if(valu!=valv) return 0;
    return 1;
}
int main()
{
    freopen("lcp.in","r",stdin);
    freopen("lcp.out","w",stdout);
    scanf("%s",s+1);
    scanf("%d",&q);
    int len=strlen(s+1);
    for(int i=1;i<=len;i++)
    {
        hsh1[i]=(hsh1[i-1]*Q+s[i]-'a')%mod;
        hsh2[i]=(hsh2[i-1]*Q+s[i]-'a')%Mod;
    }
    m1[0]=m2[0]=1;
    for(int i=1;i<=len;i++) {m1[i]=m1[i-1]*Q%mod;m2[i]=m2[i-1]*Q%Mod;}
    while(q--)
    {
        scanf("%d%d",&u,&v);
        if(u>v) swap(u,v);
        int l=0,r=len-v+1,mid;
        while(l<=r)
        {
            mid=(l+r)>>1;
            if(check(mid)) l=mid+1;
            else r=mid-1;
        }
        printf("%d
",l-1);
    }
}

#include<bits/stdc++.h>
using namespace std;
int cnt,fst[100010],nxt[200010],to[200010],c[200010],lim[200010];
void link(int x,int y,int v,int li)
{
    nxt[++cnt]=fst[x];
    fst[x]=cnt;
    to[cnt]=y;
    c[cnt]=v;
    lim[cnt]=li;
}
struct Point
{
    int id;
    int dis;
    bool operator < (const Point &a) const
    {
        return dis>a.dis;
    }
};
int n,m;
int a,b,c1,d;
int dis[100010];
int vis[100010];
void dij()
{
    priority_queue<Point>q;
    Point t;
    t.id=n;t.dis=0;
    q.push(t);
    dis[n]=0;
    while(!q.empty())
    {
        int now=q.top().id;
        q.pop();
        if(vis[now]) continue;
        vis[now]=1;
        for(int i=fst[now];i;i=nxt[i])
        {
            if(dis[to[i]]>max(lim[i],dis[now]+c[i]))
            {
                dis[to[i]]=max(lim[i],dis[now]+c[i]);
                if(!vis[to[i]]) 
                {
                    t.id=to[i];
                    t.dis=dis[to[i]];
                    q.push(t);
                }
            }
        }
    }
}
int main()
{
    freopen("spaceship.in","r",stdin);
    freopen("spaceship.out","w",stdout);
    scanf("%d%d",&n,&m);
    for(int i=1;i<=m;i++) 
    {
        scanf("%d%d%d%d",&a,&b,&c1,&d);
        link(a,b,c1,d);link(b,a,c1,d);
    }
    memset(dis,127,sizeof(dis));
    dij();
    if(dis[1]==2139062143) printf("-1
");
    else printf("%d
",dis[1]);
}

T2炸了就不放上来了

100+30+100 rank1