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답안 #1046213

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1046213 2024-08-06T11:45:58 Z shjeong 식물 비교 (IOI20_plants) C++17
100 / 100
 1812 ms 191432 KB 
#include <cstdio>
#include <cassert>
#include <vector>
#include <bits/stdc++.h>
typedef long long ll;
using namespace std;
#define all(x) x.begin(), x.end()
#define rll(x) x.rbegin(), x.rend()
#define comp(x) x.erase(unique(all(x)), x.end())
ll n;
struct lazyseg{ //min query
    vector<ll> tree, lazy;
    lazyseg(): tree(808080), lazy(808080){}
    void prop(ll node, ll s, ll e){
        if(!lazy[node])return;
        tree[node] += lazy[node];
        if(s^e)lazy[node<<1] += lazy[node], lazy[node<<1|1] += lazy[node]; lazy[node]=0;
    }
    void init(ll node, ll s, ll e, vector<int> &v){
        if(s==e){
            tree[node] = v[s];
        }
        else{
            ll mid = s+e>>1;
            init(node<<1,s,mid,v); init(node<<1|1,mid+1,e,v);
            tree[node] = min(tree[node<<1], tree[node<<1|1]);
        }
    }
    void upd(ll node, ll s, ll e, ll l, ll r, ll x){
        prop(node,s,e);
        if(e<l or r<s)return;
        if(l<=s and e<=r){
            lazy[node] = x;
            prop(node,s,e); return;
        }
        ll mid = s+e>>1;
        upd(node<<1,s,mid,l,r,x); upd(node<<1|1,mid+1,e,l,r,x);
        tree[node] = min(tree[node<<1], tree[node<<1|1]);
    }
    ll query(ll node, ll s, ll e, ll l, ll r){
        prop(node,s,e);
        if(e<l or r<s)return 1e18;
        if(l<=s and e<=r)return tree[node];
        ll mid = s+e>>1; return min(query(node<<1,s,mid,l,r), query(node<<1|1,mid+1,e,l,r));
    }
    ll find_pos(ll idx){    //idx 이상
        if(query(1,0,n-1,idx,n-1) > 0)return -1;
        ll l = idx-1, r = n;
        while(l+1 < r){
            ll mid = l+r>>1;
            if(query(1,0,n-1,idx,mid) == 0)r = mid; else l = mid;
        }
        return r;
    }
} seg;
struct segtree{
    vector<pair<ll,ll>> tree;
    segtree(): tree(1616161){}
    void upd(ll node, ll s, ll e, ll i, ll d){
        if(e<i or i<s)return;
        if(s==e)tree[node] = {d+1,s};
        else{
            ll mid = s+e>>1;
            upd(node<<1,s,mid,i,d); upd(node<<1|1,mid+1,e,i,d);
            tree[node] = max(tree[node<<1],tree[node<<1|1]);
        }
    }
    pair<ll,ll> query(ll node, ll s, ll e, ll l, ll r){
        if(e<l or r<s)return {-1,0};
        if(l<=s and e<=r)return tree[node];
        ll mid = s+e>>1; return max(query(node<<1,s,mid,l,r), query(node<<1|1,mid+1,e,l,r));
    }
} maxseg;
ll L[404040][22], R[404040][22];
vector<ll> v;
bool chk(ll l, ll r){
    l = (l+n)%n;
    r = (r+n)%n;
    if(l<=r)return seg.query(1,0,n-1,l,r) > 0;
    return min(seg.query(1,0,n-1,l,n-1), seg.query(1,0,n-1,0,r)) > 0;
}
void subs(ll l, ll r){
    l = (l+n)%n;
    r = (r+n)%n;
    if(l<=r)seg.upd(1,0,n-1,l,r,-1);
    else{
        seg.upd(1,0,n-1,l,n-1,-1);
        seg.upd(1,0,n-1,0,r,-1);
    }
}
ll K;
void init(int k, std::vector<int> r) {
    n = r.size(); k--;
    K=k;
    seg.init(1,0,n-1,r);
    vector<ll> cand;
    for(int i = 0 ; i < n ; i++)if(r[i] == 0){
        if(chk(i-k, i-1))cand.push_back(i);
    }
    v.resize(n*2);
    for(int t = 0 ; cand.size() ; t++){
        vector<ll> nxt;
        for(auto i : cand){
            v[i] = v[n+i] = n-t, subs(i-k, i-1);
            seg.upd(1,0,n-1,i,i,1e9);
        }
        for(auto i : cand){
            ll l = (i-k+n)%n, r = (i-1+n)%n;
            ll p = -1;
            if(l<=r){
                p = seg.find_pos(l);
                if((l <= p and p <= r) and chk(p-k,p-1))nxt.push_back(p);
            }
            else{
                p = seg.find_pos(l);
                if(p==-1)p = seg.find_pos(0);
                if(((l <= p and p <= n) or (0 <= p and p <= r)) and chk(p-k,p-1))nxt.push_back(p);
            }
            l = (i+1)%n, r = (i+k)%n;
            p = -1;
            if(l<=r){
                p = seg.find_pos(l);
                if((l <= p and p <= r) and chk(p-k,p-1))nxt.push_back(p);
            }
            else{
                p = seg.find_pos(l);
                if(p==-1)p = seg.find_pos(0);
                if(((l <= p and p <= n) or (0 <= p and p <= r)) and chk(p-k,p-1))nxt.push_back(p);
            }
        }
        cand.clear(); sort(all(nxt)); comp(nxt); for(auto i : nxt)cand.push_back(i);
    }
    vector<pair<ll,ll>> e;
    for(int i = 0 ; i < n ; i++)e.push_back({v[i],i});
    sort(all(e));
    memset(L,-1,sizeof(L));
    memset(R,-1,sizeof(R));
    for(auto [d,x] : e){
        if(x-k >= 0){
            auto [_,t] = maxseg.query(1,0,n*2-1, x-k, x-1);
            if(_ > 0)L[x][0] = t;
        }
        if(x+k < n*2){
            auto [_,t] = maxseg.query(1,0,n*2-1, x+1, x+k);
            if(_ > 0)R[x][0] = t;
        }
        
        if(x+n-k >= 0){
            auto [_,t] = maxseg.query(1,0,n*2-1, x+n-k, x+n-1);
            if(_ > 0)L[n+x][0] = t;
        }
        if(x+n+k < n*2){
            auto [_,t] = maxseg.query(1,0,n*2-1, x+n+1, x+n+k);
            if(_ > 0)R[n+x][0] = t;
        }
        maxseg.upd(1,0,n*2-1,x,d);
        maxseg.upd(1,0,n*2-1,x+n,d);
    }
    for(int j = 1 ; j <= 20 ; j++){
        for(int i = 0 ; i < n*2 ; i++){
            if(L[i][j-1] < 0)L[i][j] = -1;
            else if(L[L[i][j-1]][j-1] < 0)L[i][j] = -1;
            else L[i][j] = L[L[i][j-1]][j-1];
            
            if(R[i][j-1] < 0)R[i][j] = -1;
            else if(R[R[i][j-1]][j-1] < 0)R[i][j] = -1;
            else R[i][j] = R[R[i][j-1]][j-1];
        }
    }
}

int compare_plants(int x, int y) {
    if(x < y){
        ll nx = x;  //x < y
        for(int i = 20 ; i >= 0 ; i--){
            if(R[nx][i] < 0 or R[nx][i] + K >= y)continue;
            nx = R[nx][i];
        }
        if(nx + K < y)nx = R[nx][0];
        if(nx>=0 and nx + K >= y and v[nx] > v[y])return 1;
        nx = n+x;
        for(int i = 20 ; i >= 0 ; i--){
            if(L[nx][i] < 0 or L[nx][i] - K <= y)continue;
            nx = L[nx][i];
        }
        if(nx - K > y)nx = L[nx][0];
        if(nx>=0 and nx - K <= y and v[nx] > v[y])return 1;
        swap(x,y);  //x > y
        nx = x;
        for(int i = 20 ; i >= 0 ; i--){
            if(L[nx][i] < 0 or L[nx][i] - K <= y)continue;
            nx = L[nx][i];
        }
        if(nx - K > y)nx = L[nx][0];
        if(nx>=0 and nx - K <= y and v[nx] > v[y])return -1;
        nx = x;
        for(int i = 20 ; i >= 0 ; i--){
            if(R[nx][i] < 0 or R[nx][i] + K >= n+y)continue;
            nx = R[nx][i];
        }
        if(nx + K < n+y)nx = R[nx][0];
        if(nx>=0 and nx + K >= n+y and v[nx] > v[n+y])return -1;
    }
    else{
        ll nx = x; //x > y
        for(int i = 20 ; i >= 0 ; i--){
            if(L[nx][i] < 0 or L[nx][i] - K <= y)continue;
            nx = L[nx][i];
        }
        if(nx - K > y)nx = L[nx][0];
        if(nx>=0 and nx - K <= y and v[nx] > v[y])return 1;
        nx = x;
        for(int i = 20 ; i >= 0 ; i--){
            if(R[nx][i] < 0 or R[nx][i] + K >= n+y)continue;
            nx = R[nx][i];
        }
        if(nx + K < n+y)nx = R[nx][0];
        if(nx>=0 and nx + K >= n+y and v[nx] > v[n+y])return 1;
        swap(x,y);  //x < y
        nx = x;
        for(int i = 20 ; i >= 0 ; i--){
            if(R[nx][i] < 0 or R[nx][i] + K >= y)continue;
            nx = R[nx][i];
        }
        if(nx + K < y)nx = R[nx][0];
        if(nx>=0 and nx + K >= y and v[nx] > v[y])return -1;
        nx = n+x;
        for(int i = 20 ; i >= 0 ; i--){
            if(L[nx][i] < 0 or L[nx][i] - K <= y)continue;
            nx = L[nx][i];
        }
        if(nx - K > y)nx = L[nx][0];
        if(nx>=0 and nx - K <= y and v[nx] > v[y])return -1;
    }
    return 0;
}

Compilation message

plants.cpp: In member function 'void lazyseg::prop(ll, ll, ll)':
plants.cpp:17:9: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   17 |         if(s^e)lazy[node<<1] += lazy[node], lazy[node<<1|1] += lazy[node]; lazy[node]=0;
      |         ^~
plants.cpp:17:76: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   17 |         if(s^e)lazy[node<<1] += lazy[node], lazy[node<<1|1] += lazy[node]; lazy[node]=0;
      |                                                                            ^~~~
plants.cpp: In member function 'void lazyseg::init(ll, ll, ll, std::vector<int>&)':
plants.cpp:24:23: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   24 |             ll mid = s+e>>1;
      |                      ~^~
plants.cpp: In member function 'void lazyseg::upd(ll, ll, ll, ll, ll, ll)':
plants.cpp:36:19: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   36 |         ll mid = s+e>>1;
      |                  ~^~
plants.cpp: In member function 'll lazyseg::query(ll, ll, ll, ll, ll)':
plants.cpp:44:19: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   44 |         ll mid = s+e>>1; return min(query(node<<1,s,mid,l,r), query(node<<1|1,mid+1,e,l,r));
      |                  ~^~
plants.cpp: In member function 'll lazyseg::find_pos(ll)':
plants.cpp:50:23: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   50 |             ll mid = l+r>>1;
      |                      ~^~
plants.cpp: In member function 'void segtree::upd(ll, ll, ll, ll, ll)':
plants.cpp:63:23: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   63 |             ll mid = s+e>>1;
      |                      ~^~
plants.cpp: In member function 'std::pair<long long int, long long int> segtree::query(ll, ll, ll, ll, ll)':
plants.cpp:71:19: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   71 |         ll mid = s+e>>1; return max(query(node<<1,s,mid,l,r), query(node<<1|1,mid+1,e,l,r));
      |                  ~^~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 19 ms 177488 KB Output is correct
2 Correct 18 ms 177500 KB Output is correct
3 Correct 18 ms 177464 KB Output is correct
4 Correct 18 ms 177448 KB Output is correct
5 Correct 20 ms 177500 KB Output is correct
6 Correct 54 ms 180340 KB Output is correct
7 Correct 158 ms 180804 KB Output is correct
8 Correct 1266 ms 188708 KB Output is correct
9 Correct 1361 ms 187696 KB Output is correct
10 Correct 1404 ms 188404 KB Output is correct
11 Correct 1232 ms 187836 KB Output is correct
12 Correct 1110 ms 188348 KB Output is correct
13 Correct 1093 ms 187828 KB Output is correct
14 Correct 845 ms 188348 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 19 ms 177488 KB Output is correct
2 Correct 19 ms 177440 KB Output is correct
3 Correct 19 ms 177500 KB Output is correct
4 Correct 19 ms 177500 KB Output is correct
5 Correct 20 ms 177496 KB Output is correct
6 Correct 23 ms 177500 KB Output is correct
7 Correct 78 ms 180480 KB Output is correct
8 Correct 20 ms 177500 KB Output is correct
9 Correct 22 ms 177492 KB Output is correct
10 Correct 74 ms 180588 KB Output is correct
11 Correct 68 ms 180480 KB Output is correct
12 Correct 82 ms 180736 KB Output is correct
13 Correct 78 ms 180552 KB Output is correct

Subtask #3
13.0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 19 ms 177488 KB Output is correct
2 Correct 19 ms 177440 KB Output is correct
3 Correct 19 ms 177500 KB Output is correct
4 Correct 19 ms 177500 KB Output is correct
5 Correct 20 ms 177496 KB Output is correct
6 Correct 23 ms 177500 KB Output is correct
7 Correct 78 ms 180480 KB Output is correct
8 Correct 20 ms 177500 KB Output is correct
9 Correct 22 ms 177492 KB Output is correct
10 Correct 74 ms 180588 KB Output is correct
11 Correct 68 ms 180480 KB Output is correct
12 Correct 82 ms 180736 KB Output is correct
13 Correct 78 ms 180552 KB Output is correct
14 Correct 162 ms 181212 KB Output is correct
15 Correct 1523 ms 188148 KB Output is correct
16 Correct 162 ms 180752 KB Output is correct
17 Correct 1519 ms 188660 KB Output is correct
18 Correct 1237 ms 188092 KB Output is correct
19 Correct 954 ms 188664 KB Output is correct
20 Correct 1365 ms 187828 KB Output is correct

Subtask #4
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 18 ms 177496 KB Output is correct
2 Correct 19 ms 177500 KB Output is correct
3 Correct 65 ms 180284 KB Output is correct
4 Correct 1221 ms 187632 KB Output is correct
5 Correct 1495 ms 188344 KB Output is correct
6 Correct 1710 ms 191432 KB Output is correct
7 Correct 1768 ms 191124 KB Output is correct
8 Correct 1663 ms 191316 KB Output is correct
9 Correct 1362 ms 191268 KB Output is correct
10 Correct 1315 ms 190908 KB Output is correct
11 Correct 1145 ms 191168 KB Output is correct
12 Correct 953 ms 190904 KB Output is correct
13 Correct 1271 ms 191420 KB Output is correct

Subtask #5
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 20 ms 177496 KB Output is correct
2 Correct 19 ms 177500 KB Output is correct
3 Correct 18 ms 177460 KB Output is correct
4 Correct 19 ms 177456 KB Output is correct
5 Correct 19 ms 177440 KB Output is correct
6 Correct 20 ms 177512 KB Output is correct
7 Correct 33 ms 178000 KB Output is correct
8 Correct 28 ms 178012 KB Output is correct
9 Correct 29 ms 178260 KB Output is correct
10 Correct 27 ms 178332 KB Output is correct
11 Correct 29 ms 178324 KB Output is correct
12 Correct 29 ms 178512 KB Output is correct
13 Correct 27 ms 178328 KB Output is correct

Subtask #6
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 18 ms 177496 KB Output is correct
2 Correct 19 ms 177528 KB Output is correct
3 Correct 19 ms 177500 KB Output is correct
4 Correct 19 ms 177544 KB Output is correct
5 Correct 24 ms 177500 KB Output is correct
6 Correct 1576 ms 187672 KB Output is correct
7 Correct 1714 ms 187632 KB Output is correct
8 Correct 1743 ms 187636 KB Output is correct
9 Correct 1664 ms 188404 KB Output is correct
10 Correct 1424 ms 188096 KB Output is correct
11 Correct 1534 ms 187836 KB Output is correct
12 Correct 1151 ms 188344 KB Output is correct
13 Correct 1490 ms 187892 KB Output is correct
14 Correct 1611 ms 188664 KB Output is correct
15 Correct 1714 ms 190252 KB Output is correct
16 Correct 1250 ms 190040 KB Output is correct
17 Correct 1478 ms 190136 KB Output is correct

Subtask #7
25.0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 19 ms 177488 KB Output is correct
2 Correct 18 ms 177500 KB Output is correct
3 Correct 18 ms 177464 KB Output is correct
4 Correct 18 ms 177448 KB Output is correct
5 Correct 20 ms 177500 KB Output is correct
6 Correct 54 ms 180340 KB Output is correct
7 Correct 158 ms 180804 KB Output is correct
8 Correct 1266 ms 188708 KB Output is correct
9 Correct 1361 ms 187696 KB Output is correct
10 Correct 1404 ms 188404 KB Output is correct
11 Correct 1232 ms 187836 KB Output is correct
12 Correct 1110 ms 188348 KB Output is correct
13 Correct 1093 ms 187828 KB Output is correct
14 Correct 845 ms 188348 KB Output is correct
15 Correct 19 ms 177488 KB Output is correct
16 Correct 19 ms 177440 KB Output is correct
17 Correct 19 ms 177500 KB Output is correct
18 Correct 19 ms 177500 KB Output is correct
19 Correct 20 ms 177496 KB Output is correct
20 Correct 23 ms 177500 KB Output is correct
21 Correct 78 ms 180480 KB Output is correct
22 Correct 20 ms 177500 KB Output is correct
23 Correct 22 ms 177492 KB Output is correct
24 Correct 74 ms 180588 KB Output is correct
25 Correct 68 ms 180480 KB Output is correct
26 Correct 82 ms 180736 KB Output is correct
27 Correct 78 ms 180552 KB Output is correct
28 Correct 162 ms 181212 KB Output is correct
29 Correct 1523 ms 188148 KB Output is correct
30 Correct 162 ms 180752 KB Output is correct
31 Correct 1519 ms 188660 KB Output is correct
32 Correct 1237 ms 188092 KB Output is correct
33 Correct 954 ms 188664 KB Output is correct
34 Correct 1365 ms 187828 KB Output is correct
35 Correct 18 ms 177496 KB Output is correct
36 Correct 19 ms 177500 KB Output is correct
37 Correct 65 ms 180284 KB Output is correct
38 Correct 1221 ms 187632 KB Output is correct
39 Correct 1495 ms 188344 KB Output is correct
40 Correct 1710 ms 191432 KB Output is correct
41 Correct 1768 ms 191124 KB Output is correct
42 Correct 1663 ms 191316 KB Output is correct
43 Correct 1362 ms 191268 KB Output is correct
44 Correct 1315 ms 190908 KB Output is correct
45 Correct 1145 ms 191168 KB Output is correct
46 Correct 953 ms 190904 KB Output is correct
47 Correct 1271 ms 191420 KB Output is correct
48 Correct 20 ms 177496 KB Output is correct
49 Correct 19 ms 177500 KB Output is correct
50 Correct 18 ms 177460 KB Output is correct
51 Correct 19 ms 177456 KB Output is correct
52 Correct 19 ms 177440 KB Output is correct
53 Correct 20 ms 177512 KB Output is correct
54 Correct 33 ms 178000 KB Output is correct
55 Correct 28 ms 178012 KB Output is correct
56 Correct 29 ms 178260 KB Output is correct
57 Correct 27 ms 178332 KB Output is correct
58 Correct 29 ms 178324 KB Output is correct
59 Correct 29 ms 178512 KB Output is correct
60 Correct 27 ms 178328 KB Output is correct
61 Correct 75 ms 182072 KB Output is correct
62 Correct 167 ms 182904 KB Output is correct
63 Correct 1362 ms 191368 KB Output is correct
64 Correct 1601 ms 190772 KB Output is correct
65 Correct 1796 ms 191160 KB Output is correct
66 Correct 1812 ms 191376 KB Output is correct
67 Correct 1639 ms 191420 KB Output is correct
68 Correct 1410 ms 190756 KB Output is correct
69 Correct 1502 ms 191420 KB Output is correct
70 Correct 1324 ms 190648 KB Output is correct
71 Correct 1511 ms 190720 KB Output is correct
72 Correct 1691 ms 190920 KB Output is correct
73 Correct 1733 ms 191120 KB Output is correct
74 Correct 1440 ms 190792 KB Output is correct
75 Correct 1424 ms 190908 KB Output is correct