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哦我是午夜DJ~我是午夜DJ~快乐时间不能浪费~~~
题目 2020 [NOI 2015]寿司晚宴
2017-10-08 11:33:24
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我是尹鹏哲,我要带领妹子踏平这个世界!!!
题目 1812 [NOIP 2014PJ]子矩阵
2017-10-04 07:58:21
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我是尹鹏哲,我要带领妹子踏平这个世界!!!!!
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#include<bits/stdc++.h>
#define il inline #define RG register #define ll long long #define db double #define N 86444 #define rs ((o<<1)|1) #define ls (o<<1) #define mid ((l+r)>>1) using namespace std; int Min[N*4],lazy[N*4],n;int tag[N]; void down(int o){ if(lazy[o]){ lazy[rs]=Min[rs]=lazy[o]; lazy[ls]=Min[ls]=lazy[o]; lazy[o]=0; } } void Insert(int o,int l,int r,int L,int R,int num){ if(l!=r)down(o); if(l>=L&&r<=R){if(Min[o]>num) lazy[o]=Min[o]=num; return; } if(mid<L)Insert(rs,mid+1,r,L,R,num); else if(mid>=R)Insert(ls,l,mid,L,R,num); else Insert(rs,mid+1,r,mid+1,R,num),Insert(ls,l,mid,L,mid,num); Min[o]=min(Min[rs],Min[ls]); } int Query(int o,int l,int r,int pos){ if(l==r)return Min[o]; if(mid<pos)return Query(rs,mid+1,r,pos); else return Query(ls,l,mid,pos); } int L,R; struct s{ int l,r,val; void read(){ scanf("%d%d%d",&l,&r,&val); l++,r++; l=max(l,L); r=min(R,r); tag[l]++,tag[r+1]--; } }seg[N]; bool comp(const s & a,const s & b){return a.l<b.l;} int f[N]; int main(){ freopen("1.in","r",stdin); freopen("1.out","w",stdout); memset(Min,127/3,sizeof(Min)); scanf("%d",&n);scanf("%d%d",&L,&R);L++,R++; for(int i=1;i<=n;++i)seg[i].read(); int tot(0);for(int i=L;i<=R;++i){ tot+=tag[i]; if(!tot)cout<<"-1",exit(0); } sort(seg+1,seg+n+1,comp); int n1=1; for(int i=L-1;i<=R;++i){ if(i!=L-1)f[i]=Query(1,1,N-1,i); while(i==seg[n1].l-1) Insert(1,1,N-1,seg[n1].l,seg[n1].r,f[min(i,0)]+seg[n1].val),n1++; }cout<<f[R]; return 0; }
题目 1 加法问题
2017-09-10 12:06:27
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回复 @MayLava :
#include<iostream> #include<cstdlib> #include<cstdio> #include<algorithm> #define N 100010 #define lowbit ( (i) & (-i) ) #define LL long long using namespace std; struct point{ int x,y; void read(){scanf("%d%d",&x,&y);} }p[N]; struct seg{ int h1,h2,h3,flag; seg() {} seg(int x,int y,int z,int a):h1(x),h2(y),h3(z),flag(a) {} }s[N]; int tree[N],n,tot,sz,sub[N]; void Insert(int pos,int num){for(int i=pos;i<N;i+=lowbit)tree[i]+=num;} int Query(int pos){int sum(0);for(int i=sum;i;i-=lowbit)sum+=tree[i];return sum;} int find(int x){ return lower_bound(sub+1,sub+sz+1,x)-sub; } void link(int ff,int l,int r,int h){//0横线,//1竖线 if(!ff){ s[++tot]=seg(find(l),find(r),h,0); }else { int X=find(h); s[++tot]=seg(X,X,l,1); s[++tot]=seg(X,X,r,-1); } } bool comp(const point & a,const point & b){return a.x==b.x?a.y<b.y:a.x<b.x;} bool Comp(const point & a,const point & b){return a.y==b.y?a.x<b.x:a.y<b.y;} bool COMP(const seg & a,const seg & b){ if(a.h3!=b.h3)return a.h3<b.h3; return a.flag<b.flag; } void build(){ sort(p+1,p+n+1,comp); for(int i=2;i<=n;++i) if(p[i].x==p[i-1].x) link(1,p[i-1].y,p[i].y,p[i].x); sort(p+1,p+n+1,Comp); for(int i=2;i<=n;++i) if(p[i].y==p[i-1].y) link(0,p[i-1].x,p[i].x,p[i].y); sort(s+1,s+tot+1,COMP); } int main(){ scanf("%d",&n); for(int i=1;i<=n;++i)p[i].read(),sub[++sub[0]]=p[i].x; sort(sub+1,sub+sub[0]+1); sz=unique(sub+1,sub+sub[0]+1)-sub-1; build();LL Ans(0); for(int i=1;i<=tot;++i){ if(!s[i].flag)Ans+=Query(s[i].h2)-Query(s[i].h1-1); else { Insert(s[i].h1,s[i].flag); } }cout<<Ans; return 0; }
题目 1 加法问题
2017-09-05 22:51:53
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加了氧气还慢一些是为什么
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#include<bits/stdc++.h>
#define N 3010 using namespace std; struct ed{int nxt,to;}e[N]; int head[N],tot,w[N],n,rt,dp[N][N],k; void add(int u,int v){e[tot].nxt=head[u];e[tot].to=v;head[u]=tot++;} void DP(int u,int cnt){if(!cnt)return; for(int i=head[u];i!=-1;i=e[i].nxt){ int v=e[i].to; for(int j=1;j<=cnt;++j)dp[v][j]=dp[u][j];DP(v,cnt-1); for(int j=cnt;j>=1;j--)dp[u][j]=max(dp[u][j],dp[v][j-1]+w[v]); } } int main(){ freopen("knapsack.in","r",stdin); freopen("knapsack.out","w",stdout); memset(head,-1,sizeof(head));cin>>n>>k;int zz; for(int i=1;i<=n;++i){ cin>>zz;if(zz)add(zz,i); else rt=i; }for(int i=1;i<=n;++i)cin>>w[i];DP(rt,k); cout<<dp[rt][k-1]+w[rt]; return 0; }
题目 2557 [NOIP 2016]天天爱跑步
2017-07-15 21:35:35
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#include <algorithm>
#include <iostream> #include <cstdlib> #include <cstring> #include <cstdio> #include <cmath> #include <queue> #define inf (1<<30) #define il inline #define RG register #define LL long long #define lowbit(o) o & (-o) #define N 40001 using namespace std; struct ed{int nxt,to;}e[N*2];int head[N],tot; int id[N],top[N],BL[N],sz[N],fa[N],deep[N],hson[N],w[N]; int n,P,Q,idn; inline int read() { int x=0; char ch=getchar(); while(ch<'0'||ch>'9') ch=getchar(); while(ch>='0'&&ch<='9') x=x*10+ch-'0',ch=getchar(); return x; } il void add(RG int u,RG int v){e[tot].nxt=head[u];e[tot].to=v;head[u]=tot++;} il void ADD(RG int u,RG int v){add(u,v),add(v,u);} il void dfs1(RG int u,RG int faa){ deep[u]=deep[faa]+1,sz[u]=1;fa[u]=faa; for(RG int i=head[u];i!=-1;i=e[i].nxt)if(e[i].to!=faa){ RG int v=e[i].to;dfs1(v,u); sz[u]+=sz[v];if(sz[hson[u]]<sz[v])hson[u]=v; } } il void dfs2(RG int u,RG int toop){top[u]=toop; id[u]=++idn;BL[idn]=u;if(hson[u])dfs2(hson[u],toop); for(RG int i=head[u];i!=-1;i=e[i].nxt) if(e[i].to!=fa[u]&&e[i].to!=hson[u]) dfs2(e[i].to,e[i].to);w[u]=idn; } il int LCA(RG int x,RG int y){ while(top[x]!=top[y]){ if(deep[top[x]]<deep[top[y]])swap(x,y); x=fa[top[x]]; }if(deep[x]>deep[y])swap(x,y); return x; } il int gogogo(int x,int y){RG int ll=0; while(top[x]!=top[y]){ if(deep[top[x]]<deep[top[y]])swap(x,y); ll=top[x],x=fa[top[x]]; }if(deep[x]>deep[y])swap(x,y); return x==y?ll:BL[id[x]+1]; } struct matrix{ int x,xx,y,yy,k; matrix() {} matrix(int X,int XX,int Y,int YY,int K):x(X),xx(XX),y(Y),yy(YY),k(K) {} }p[N*2];int cnt; struct node{ int x,y,k,id; node() {} node(int _x,int _y,int _k,int i):x(_x),y(_y),k(_k),id(i) {} }ff[N],quer[N],quel[N]; int tree[N],ans[N]; il void Add(int x,int y){for(RG int i=x;i<=n;i+=lowbit(i))tree[i]+=y;} int Query(int x){int s=0;for(RG int i=x;i;i-=lowbit(i))s+=tree[i];return s;} il bool comp(const matrix & a,const matrix & b){return a.k<b.k;} struct ha{ int x,y,yy,v,kind; ha() {} ha(int a,int b,int c,int d,int e):x(a),y(b),yy(c),v(d),kind(e) {} }que[N*3];int sum[N]; il bool Comp(const ha & a,const ha & b){return a.x==b.x?a.kind<b.kind:a.x<b.x;} il void solve(RG int h,RG int t,RG int l,RG int r){ if(t<h)return; if(l==r){ for(int i=h;i<=t;++i)ans[ff[i].id]=p[l].k; return; }RG int mid=(l+r)>>1;int ss=0; for(RG int i=l;i<=mid;++i){ que[++ss]=ha(p[i].x,p[i].y,p[i].yy,1,0); que[++ss]=ha(p[i].xx,p[i].y,p[i].yy,-1,n+1); }for(RG int i=h;i<=t;++i) que[++ss]=ha(ff[i].x,ff[i].y,0,0,i); sort(que+1,que+ss+1,Comp);memset(tree,0,sizeof(tree)); for(RG int i=1;i<=ss;++i) if(que[i].kind>=h&&que[i].kind<=t) sum[que[i].kind]=Query(que[i].y); else Add(que[i].y,que[i].v),Add(que[i].yy+1,-que[i].v); RG int L=0,R=0; for(RG int i=h;i<=t;++i){ if(sum[i]>=ff[i].k)quel[++L]=ff[i]; else quer[++R]=ff[i],quer[R].k-=sum[i]; }for(RG int i=1;i<=L;++i)ff[i+h-1]=quel[i]; for(RG int i=1;i<=R;++i)ff[L+h+i-1]=quer[i]; solve(h,h+L-1,l,mid);solve(h+L,t,mid+1,r); } int main(){ freopen("fruit_hnoi2015.in","r",stdin); freopen("fruit_hnoi2015.out","w",stdout); memset(head,-1,sizeof(head)); n=read(),P=read(),Q=read();int u,v; for(RG int i=1;i<n;++i)u=read(),v=read(),ADD(u,v); dfs1(1,1),dfs2(1,1); for(RG int i=1;i<=P;++i){ RG int a,b,c;a=read(),b=read(),c=read(); RG int lca=LCA(a,b);if(id[a]>id[b])swap(a,b); if(lca==a){RG int mm=gogogo(a,b); if(id[mm]>1)p[++cnt]=matrix(1,id[mm]-1,id[b],w[b],c); if(w[mm]+1<=n)p[++cnt]=matrix(id[b],w[b],w[mm]+1,n,c); } else p[++cnt]=matrix(id[a],w[a],id[b],w[b],c); } for(RG int i=1;i<=Q;++i){ RG int u,v,k;u=read(),v=read(),k=read(); if(id[u]>id[v])swap(u,v); ff[i]=node(id[u],id[v],k,i); }sort(p+1,p+cnt+1,comp);solve(1,Q,1,cnt); for(RG int i=1;i<=Q;++i)cout<<ans[i]<<"\n"; return 0; } |
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我是卿云鹏,我要带领数千万巨人踏平这个世界!!!
题目 631 [NOIP 2011]聪明的质监员
2017-06-10 22:14:11
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Tarjan+SPFA+dp
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