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답안 #1046210

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1046210 2024-08-06T11:43:19 Z shjeong 식물 비교 (IOI20_plants) C++17
32 / 100
 1512 ms 192192 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 ; 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 18 ms 177500 KB Output is correct
2 Correct 18 ms 177480 KB Output is correct
3 Correct 19 ms 177500 KB Output is correct
4 Correct 19 ms 177500 KB Output is correct
5 Correct 19 ms 177496 KB Output is correct
6 Correct 55 ms 180276 KB Output is correct
7 Correct 151 ms 180880 KB Output is correct
8 Correct 1225 ms 187844 KB Output is correct
9 Correct 1267 ms 187948 KB Output is correct
10 Correct 1300 ms 187832 KB Output is correct
11 Correct 1146 ms 187792 KB Output is correct
12 Correct 1004 ms 187832 KB Output is correct
13 Correct 1076 ms 187836 KB Output is correct
14 Correct 776 ms 188804 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 18 ms 177492 KB Output is correct
2 Correct 20 ms 177756 KB Output is correct
3 Correct 19 ms 177500 KB Output is correct
4 Correct 19 ms 177440 KB Output is correct
5 Correct 20 ms 177504 KB Output is correct
6 Correct 22 ms 177492 KB Output is correct
7 Correct 75 ms 180576 KB Output is correct
8 Correct 19 ms 177500 KB Output is correct
9 Correct 24 ms 177500 KB Output is correct
10 Correct 73 ms 180480 KB Output is correct
11 Correct 69 ms 180484 KB Output is correct
12 Correct 75 ms 180564 KB Output is correct
13 Correct 72 ms 180484 KB Output is correct

Subtask #3
13.0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 18 ms 177492 KB Output is correct
2 Correct 20 ms 177756 KB Output is correct
3 Correct 19 ms 177500 KB Output is correct
4 Correct 19 ms 177440 KB Output is correct
5 Correct 20 ms 177504 KB Output is correct
6 Correct 22 ms 177492 KB Output is correct
7 Correct 75 ms 180576 KB Output is correct
8 Correct 19 ms 177500 KB Output is correct
9 Correct 24 ms 177500 KB Output is correct
10 Correct 73 ms 180480 KB Output is correct
11 Correct 69 ms 180484 KB Output is correct
12 Correct 75 ms 180564 KB Output is correct
13 Correct 72 ms 180484 KB Output is correct
14 Correct 159 ms 180800 KB Output is correct
15 Correct 1478 ms 187828 KB Output is correct
16 Correct 158 ms 180872 KB Output is correct
17 Correct 1512 ms 191368 KB Output is correct
18 Correct 1160 ms 190936 KB Output is correct
19 Correct 849 ms 192192 KB Output is correct
20 Correct 1393 ms 191424 KB Output is correct

Subtask #4
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 19 ms 177500 KB Output is correct
2 Correct 18 ms 177516 KB Output is correct
3 Incorrect 66 ms 180304 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #5
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 19 ms 177500 KB Output is correct
2 Correct 19 ms 177468 KB Output is correct
3 Correct 20 ms 177292 KB Output is correct
4 Correct 19 ms 177500 KB Output is correct
5 Correct 19 ms 177484 KB Output is correct
6 Incorrect 20 ms 177584 KB Output isn't correct
7 Halted 0 ms 0 KB -

Subtask #6
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 20 ms 177488 KB Output is correct
2 Correct 18 ms 177556 KB Output is correct
3 Correct 19 ms 177500 KB Output is correct
4 Correct 19 ms 177448 KB Output is correct
5 Incorrect 22 ms 177496 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #7
0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 18 ms 177500 KB Output is correct
2 Correct 18 ms 177480 KB Output is correct
3 Correct 19 ms 177500 KB Output is correct
4 Correct 19 ms 177500 KB Output is correct
5 Correct 19 ms 177496 KB Output is correct
6 Correct 55 ms 180276 KB Output is correct
7 Correct 151 ms 180880 KB Output is correct
8 Correct 1225 ms 187844 KB Output is correct
9 Correct 1267 ms 187948 KB Output is correct
10 Correct 1300 ms 187832 KB Output is correct
11 Correct 1146 ms 187792 KB Output is correct
12 Correct 1004 ms 187832 KB Output is correct
13 Correct 1076 ms 187836 KB Output is correct
14 Correct 776 ms 188804 KB Output is correct
15 Correct 18 ms 177492 KB Output is correct
16 Correct 20 ms 177756 KB Output is correct
17 Correct 19 ms 177500 KB Output is correct
18 Correct 19 ms 177440 KB Output is correct
19 Correct 20 ms 177504 KB Output is correct
20 Correct 22 ms 177492 KB Output is correct
21 Correct 75 ms 180576 KB Output is correct
22 Correct 19 ms 177500 KB Output is correct
23 Correct 24 ms 177500 KB Output is correct
24 Correct 73 ms 180480 KB Output is correct
25 Correct 69 ms 180484 KB Output is correct
26 Correct 75 ms 180564 KB Output is correct
27 Correct 72 ms 180484 KB Output is correct
28 Correct 159 ms 180800 KB Output is correct
29 Correct 1478 ms 187828 KB Output is correct
30 Correct 158 ms 180872 KB Output is correct
31 Correct 1512 ms 191368 KB Output is correct
32 Correct 1160 ms 190936 KB Output is correct
33 Correct 849 ms 192192 KB Output is correct
34 Correct 1393 ms 191424 KB Output is correct
35 Correct 19 ms 177500 KB Output is correct
36 Correct 18 ms 177516 KB Output is correct
37 Incorrect 66 ms 180304 KB Output isn't correct
38 Halted 0 ms 0 KB -