oj.uz

Submission #163118

# Submission time Handle Problem Language Result Execution time Memory
163118 2019-11-11T12:57:25 Z mhy908 Werewolf (IOI18_werewolf) C++14
100 / 100
 949 ms 76536 KB 
#include "werewolf.h"
#include <bits/stdc++.h>
#define F first
#define S second
#define pb push_back
#define mp make_pair
#define all(x) x.begin(), x.end()
using namespace std;
typedef long long LL;
typedef pair<int, int> pii;
typedef pair<LL, LL> pll;
typedef vector<int> vi;
const LL llinf=987654321987654321;
const int inf=987654321;
int n, q;
struct query{
    int l, r;
    int s, e;
    int stx, finx, sty, finy;
    int num;
}qu[200010];
bool operator < (const query &a, const query &b){
    if(a.l!=b.l)return a.l<b.l;
    if(a.r!=b.r)return a.r<b.r;
    if(a.s!=b.s)return a.s<b.s;
    if(a.e!=b.e)return a.e<b.e;
}
bool cmp1(query a, query b){
    if(a.l!=b.l)return a.l<b.l;
    return a<b;
}
bool cmp2(query a, query b){
    if(a.r!=b.r)return a.r>b.r;
    return !(a<b);
}
bool cmp3(query a, query b){
    if(a.finx!=b.finx)return a.finx<b.finx;
    return a<b;
}
vi link[200010];
struct Union_Find{
    int par[200010];
    void init(){for(int i=1; i<=200000; i++)par[i]=i;}
    int findpar(int num){return num==par[num]?num:par[num]=findpar(par[num]);}
    void mergepar(int a, int b){
        a=findpar(a);
        b=findpar(b);
        par[a]=b;
    }
    bool chk(int a, int b){return findpar(a)==findpar(b);}
}tl;
struct Treenode{
    int maxx, et;
    int fr, re;
    int l, r;
}treel[400010], treer[400010];
int treelrev[200010], treerrev[200010];
int lrv[200010], rrv[200010];
pii point[200010];
int tmp;
void eulerl(int num){
    if(treel[num].l==-1){
        ++tmp;
        treel[num].fr=tmp;
        treel[num].re=tmp;
        treel[num].et=tmp;
        treelrev[treel[num].maxx]=tmp;
        lrv[treel[num].maxx]=num;
        return;
    }
    eulerl(treel[num].l);
    eulerl(treel[num].r);
    treel[num].fr=treel[treel[num].l].fr;
    treel[num].re=treel[treel[num].r].re;
}
void eulerr(int num){
    if(treer[num].l==-1){
        ++tmp;
        treer[num].fr=tmp;
        treer[num].re=tmp;
        treer[num].et=tmp;
        treerrev[treer[num].maxx]=tmp;
        rrv[treer[num].maxx]=num;
        return;
    }
    eulerr(treer[num].l);
    eulerr(treer[num].r);
    treer[num].fr=treer[treer[num].l].fr;
    treer[num].re=treer[treer[num].r].re;
}
void makeltree(){
    sort(qu+1, qu+q+1, cmp1);
    int x=0;
    tl.init();
    for(int i=1; i<=n; i++){
        x++;
        treel[x].maxx=i;
        treel[x].l=-1;
        treel[x].r=-1;
        lrv[i]=x;
        for(int j=0; j<link[i].size(); j++){
            if(link[i][j]>i||tl.chk(i, link[i][j]))continue;
            int temp=tl.findpar(link[i][j]);
            x++;
            treel[x].maxx=i;
            treel[x].l=lrv[temp];
            treel[x].r=x-1;
            lrv[i]=x;
            tl.mergepar(temp, i);
        }
    }
    eulerl(x);
    x=0;
    tl.init();
    int pv=1;
    for(int i=1; i<=n; i++){
        x++;
        for(int j=0; j<link[i].size(); j++){
            if(link[i][j]>i||tl.chk(i, link[i][j]))continue;
            lrv[i]=++x;
            tl.mergepar(link[i][j], i);
        }
        for(; pv<=q; pv++){
            if(qu[pv].l>i)break;
            int t=lrv[tl.findpar(qu[pv].s)];
            qu[pv].stx=treel[t].fr;
            qu[pv].finx=treel[t].re;
        }
    }
}
void makertree(){
    sort(qu+1, qu+q+1, cmp2);
    int x=0;
    tl.init();
    for(int i=n; i>=1; i--){
        x++;
        treer[x].maxx=i;
        treer[x].l=-1;
        treer[x].r=-1;
        rrv[i]=x;
        for(int j=0; j<link[i].size(); j++){
            if(link[i][j]<i||tl.chk(i, link[i][j]))continue;
            int temp=tl.findpar(link[i][j]);
            x++;
            treer[x].maxx=i;
            treer[x].r=rrv[temp];
            treer[x].l=x-1;
            rrv[i]=x;
            tl.mergepar(temp, i);
        }
    }
    tmp=0;
    eulerr(x);
    x=0;
    tl.init();
    int pv=1;
    for(int i=n; i>=1; i--){
        x++;
        for(int j=0; j<link[i].size(); j++){
            if(link[i][j]<i||tl.chk(i, link[i][j]))continue;
            rrv[i]=++x;
            tl.mergepar(link[i][j], i);
        }
        for(; pv<=q; pv++){
            if(qu[pv].r<i)break;
            int t=rrv[tl.findpar(qu[pv].e)];
            qu[pv].sty=treer[t].fr;
            qu[pv].finy=treer[t].re;
        }
    }
}
struct SEGMENT_TREE {
    struct NODE {
        int st, fin;
        int q;
    }tree[800010];
    int x;
    const int inf=987654321;
    int f(int a, int b){return max(a, b);}
    void maketree(int point, int num) {
        if(num==1)tree[point].st=tree[point].fin=++x;
        if(num<=1)return;
        maketree(point*2, num-num/2);
        maketree(point*2+1, num/2);
        tree[point].st=tree[point*2].st;
        tree[point].fin=tree[point*2+1].fin;
    }
    int query(int a, int b, int point) {
        if(tree[point].st>=a&&tree[point].fin<=b)
            return tree[point].q;
        if(tree[point].st>b||tree[point].fin<a)
            return 0;
        return f(query(a, b, point*2), query(a, b, point*2+1));
    }
    void updaterange(int point, int num, int p) {
        if(tree[point].st==tree[point].fin) {
            tree[point].q=p;
            return;
        }
        if(num<=tree[point*2].fin)updaterange(point*2, num, p);
        else updaterange(point*2+1, num, p);
        tree[point].q=f(tree[point*2].q, tree[point*2+1].q);
    }
    void init(int n) {
        maketree(1, n);
    }
    int get_query(int a, int b) {
        return query(a, b, 1);
    }
    void update(int a, int num) {
        updaterange(1, a, num);
    }
}seg;
vi check_validity(int N, vi X, vi Y, vi E, vi S, vi R, vi L){
    n=N;
    q=S.size();
    for(int i=0; i<q; i++){
        qu[i+1].l=L[i]+1;
        qu[i+1].r=R[i]+1;
        qu[i+1].s=S[i]+1;
        qu[i+1].e=E[i]+1;
        qu[i+1].num=i;
    }
    for(int i=0; i<X.size(); i++){
        link[X[i]+1].pb(Y[i]+1);
        link[Y[i]+1].pb(X[i]+1);
    }
    makeltree();
    makertree();
    for(int i=1; i<=n; i++){
        point[i].F=treelrev[i];
        point[i].S=treerrev[i];
    }
    sort(point+1, point+n+1);
    sort(qu+1, qu+q+1, cmp3);
    seg.init(n);
    vi ans(q);
    int pv=1;
    for(int i=1; i<=n; i++){
        seg.update(point[i].S, i);
        for(; pv<=q; pv++){
            if(i<qu[pv].finx)break;
            int t=seg.get_query(qu[pv].sty, qu[pv].finy);
            if(t>=qu[pv].stx)ans[qu[pv].num]=1;
        }
    }
    return ans;
}
/*
6 6 3
5 1
1 2
1 3
3 4
3 0
5 2
4 2 1 2
4 2 2 2
5 4 3 4
*/

Compilation message

werewolf.cpp: In function 'void makeltree()':
werewolf.cpp:101:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int j=0; j<link[i].size(); j++){
                      ~^~~~~~~~~~~~~~~
werewolf.cpp:118:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int j=0; j<link[i].size(); j++){
                      ~^~~~~~~~~~~~~~~
werewolf.cpp: In function 'void makertree()':
werewolf.cpp:141:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int j=0; j<link[i].size(); j++){
                      ~^~~~~~~~~~~~~~~
werewolf.cpp:159:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int j=0; j<link[i].size(); j++){
                      ~^~~~~~~~~~~~~~~
werewolf.cpp: In function 'vi check_validity(int, vi, vi, vi, vi, vi, vi)':
werewolf.cpp:224:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0; i<X.size(); i++){
                  ~^~~~~~~~~
werewolf.cpp: In function 'bool operator<(const query&, const query&)':
werewolf.cpp:27:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 5880 KB Output is correct
2 Correct 7 ms 5880 KB Output is correct
3 Correct 8 ms 5880 KB Output is correct
4 Correct 7 ms 5880 KB Output is correct
5 Correct 8 ms 5928 KB Output is correct
6 Correct 8 ms 5852 KB Output is correct
7 Correct 8 ms 5880 KB Output is correct
8 Correct 7 ms 5880 KB Output is correct
9 Correct 8 ms 5880 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 5880 KB Output is correct
2 Correct 7 ms 5880 KB Output is correct
3 Correct 8 ms 5880 KB Output is correct
4 Correct 7 ms 5880 KB Output is correct
5 Correct 8 ms 5928 KB Output is correct
6 Correct 8 ms 5852 KB Output is correct
7 Correct 8 ms 5880 KB Output is correct
8 Correct 7 ms 5880 KB Output is correct
9 Correct 8 ms 5880 KB Output is correct
10 Correct 15 ms 6776 KB Output is correct
11 Correct 15 ms 6776 KB Output is correct
12 Correct 15 ms 6776 KB Output is correct
13 Correct 15 ms 6776 KB Output is correct
14 Correct 14 ms 6904 KB Output is correct
15 Correct 17 ms 6904 KB Output is correct

Subtask #3
34.0 / 34.0

# Verdict Execution time Memory Grader output
1 Correct 766 ms 63224 KB Output is correct
2 Correct 736 ms 69084 KB Output is correct
3 Correct 695 ms 67960 KB Output is correct
4 Correct 698 ms 67600 KB Output is correct
5 Correct 724 ms 67592 KB Output is correct
6 Correct 750 ms 67704 KB Output is correct
7 Correct 753 ms 67548 KB Output is correct
8 Correct 715 ms 69180 KB Output is correct
9 Correct 620 ms 67960 KB Output is correct
10 Correct 769 ms 67576 KB Output is correct
11 Correct 692 ms 67592 KB Output is correct
12 Correct 678 ms 67576 KB Output is correct
13 Correct 720 ms 69112 KB Output is correct
14 Correct 705 ms 69112 KB Output is correct
15 Correct 700 ms 69036 KB Output is correct
16 Correct 701 ms 68992 KB Output is correct
17 Correct 704 ms 67424 KB Output is correct

Subtask #4
51.0 / 51.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 5880 KB Output is correct
2 Correct 7 ms 5880 KB Output is correct
3 Correct 8 ms 5880 KB Output is correct
4 Correct 7 ms 5880 KB Output is correct
5 Correct 8 ms 5928 KB Output is correct
6 Correct 8 ms 5852 KB Output is correct
7 Correct 8 ms 5880 KB Output is correct
8 Correct 7 ms 5880 KB Output is correct
9 Correct 8 ms 5880 KB Output is correct
10 Correct 15 ms 6776 KB Output is correct
11 Correct 15 ms 6776 KB Output is correct
12 Correct 15 ms 6776 KB Output is correct
13 Correct 15 ms 6776 KB Output is correct
14 Correct 14 ms 6904 KB Output is correct
15 Correct 17 ms 6904 KB Output is correct
16 Correct 766 ms 63224 KB Output is correct
17 Correct 736 ms 69084 KB Output is correct
18 Correct 695 ms 67960 KB Output is correct
19 Correct 698 ms 67600 KB Output is correct
20 Correct 724 ms 67592 KB Output is correct
21 Correct 750 ms 67704 KB Output is correct
22 Correct 753 ms 67548 KB Output is correct
23 Correct 715 ms 69180 KB Output is correct
24 Correct 620 ms 67960 KB Output is correct
25 Correct 769 ms 67576 KB Output is correct
26 Correct 692 ms 67592 KB Output is correct
27 Correct 678 ms 67576 KB Output is correct
28 Correct 720 ms 69112 KB Output is correct
29 Correct 705 ms 69112 KB Output is correct
30 Correct 700 ms 69036 KB Output is correct
31 Correct 701 ms 68992 KB Output is correct
32 Correct 704 ms 67424 KB Output is correct
33 Correct 776 ms 68168 KB Output is correct
34 Correct 469 ms 44680 KB Output is correct
35 Correct 796 ms 69752 KB Output is correct
36 Correct 765 ms 67832 KB Output is correct
37 Correct 787 ms 69112 KB Output is correct
38 Correct 810 ms 68088 KB Output is correct
39 Correct 744 ms 70904 KB Output is correct
40 Correct 937 ms 76424 KB Output is correct
41 Correct 752 ms 68748 KB Output is correct
42 Correct 707 ms 67828 KB Output is correct
43 Correct 917 ms 72824 KB Output is correct
44 Correct 776 ms 69112 KB Output is correct
45 Correct 783 ms 71240 KB Output is correct
46 Correct 738 ms 70904 KB Output is correct
47 Correct 666 ms 69384 KB Output is correct
48 Correct 672 ms 69212 KB Output is correct
49 Correct 844 ms 69212 KB Output is correct
50 Correct 690 ms 69112 KB Output is correct
51 Correct 949 ms 76536 KB Output is correct
52 Correct 912 ms 76412 KB Output is correct