답안 #800003

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
800003	2023-08-01T09:17:06 Z	반딧불(#10081)	수확 (JOI20_harvest)	C++17	100 / 100	722 ms	189188 KB

harvest

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

void input();
void getPersonInfo();
void organizeTree();
void getAppleInfo();
void inputQuery();
void solve();
void output();

int main(){
    input();
    getPersonInfo();
    organizeTree();
    getAppleInfo();
    inputQuery();
    solve();
    output();
}

int n, k, q; ll L, C;
ll a[200002], b[200002];

void input(){
    scanf("%d %d %lld %lld", &n, &k, &L, &C);
    for(int i=1; i<=n; i++) scanf("%lld", &a[i]);
    for(int i=1; i<=k; i++) scanf("%lld", &b[i]);
}

int nxt[200002]; ll delay[200002];
int par[200002]; bool inCycle[200002]; /// inCycle�� 0�� ��츸 par�� 0�� �ƴϴ�
ll dist[200002];
int cycleNum[200002], cycleIdx[200002];

vector<int> cycle[200002]; /// ����Ŭ�� ��� ���
vector<ll> cycleT[200002]; /// ���������� �� �������� ��ȸ�ϴ� �� �ɸ��� �ð�
ll cycleLength[200002]; /// �� ����Ŭ�� �ѷ�

int findNxt(ll t){ /// t ������ ã��
    int idx = upper_bound(a+1, a+n+1, t) - a - 1;
    if(idx == 0) idx = n;
    return idx;
}

ll findNxtTime(ll s, ll mod){
    return (s-mod+L-1)/L*L+mod;
}

void getPersonInfo(){
    for(int i=1; i<=n; i++){
        nxt[i] = findNxt((a[i]-C%L+L)%L);
        delay[i] = findNxtTime(C, (a[i] - a[nxt[i]] + L) % L);
    }

    vector<int> visited (n+1);
    for(int i=1; i<=n; i++){
        if(visited[i]) continue;
        vector<int> history;
        int x = i; ll timeSum = 0;
        while(true){
            if(visited[x]){ /// ��
                if(visited[x] == i){ /// ���ο� ����Ŭ�� ã�Ҵ�
                    int idx = find(history.begin(), history.end(), x) - history.begin();
                    /// [idx, end) �κ��� �׳� ����Ŭ�� ������ �ȴ�
                    for(int i=idx; i<(int)history.size(); i++){
                        cycle[x].push_back(history[i]);
                        cycleT[x].push_back(cycleLength[x]);
                        cycleNum[history[i]] = x, cycleIdx[history[i]] = i-idx, inCycle[history[i]] = true;
                        cycleLength[x] += delay[history[i]];
                    }
                    /// �޺κ��� �׳� Ʈ��
                    int pr = x;
                    for(int i=idx-1; i>=0; i--){
                        par[history[i]] = pr, dist[history[i]] = dist[pr] + delay[history[i]];
                        cycleNum[history[i]] = cycleNum[pr], cycleIdx[history[i]] = cycleIdx[pr];
                        pr = history[i];
                    }
                }
                else{ /// �׳� Ʈ�� �Ϻκ��� ã�Ҵ�
                    int pr = x;
                    for(int i=(int)history.size()-1; i>=0; i--){
                        par[history[i]] = pr, dist[history[i]] = dist[pr] + delay[history[i]];
                        cycleNum[history[i]] = cycleNum[pr], cycleIdx[history[i]] = cycleIdx[pr];
                        pr = history[i];
                    }
                }
                break;
            }

            visited[x] = i;
            history.push_back(x);
            timeSum += delay[x], x = nxt[x];
        }
    }



    #ifdef TEST
    printf("Person info done\n");
    for(int i=1; i<=n; i++){
        printf("%d: ", i);
        if(inCycle[i]) printf("in cycle, %d - %dth, dist %lld\n", cycleNum[i], cycleIdx[i], cycleT[cycleNum[i]][cycleIdx[i]]);
        else printf("in tree, par %d, dist %lld\n", par[i], dist[i]);
    }
    #endif // TEST
}

vector<int> child[200002];
int depth[200002], LCADB[200002][20];

void dfs(int x){
    for(auto y: child[x]){
        depth[y] = depth[x] + 1, par[y] = LCADB[y][0] = x;
        dfs(y);
    }
}

void organizeTree(){
    for(int i=1; i<=n; i++){
        if(par[i]) child[par[i]].push_back(i);
    }
    for(int i=1; i<=n; i++){
        if(inCycle[i]) dfs(i);
    }
    for(int d=1; d<20; d++) for(int i=1; i<=n; i++) LCADB[i][d] = LCADB[LCADB[i][d-1]][d-1];
}

int appleTo[200002]; ll appleDelay[200002];

void getAppleInfo(){
    for(int i=1; i<=k; i++){
        appleTo[i] = findNxt(b[i]);
        appleDelay[i] = (b[i] - a[appleTo[i]] + L) % L;
    }

    #ifdef TEST
    puts("Apple info");
    for(int i=1; i<=k; i++) printf("%d: to %d, delay %lld\n", i, appleTo[i], appleDelay[i]);
    #endif // TEST
}

/// ���� �Է��ϴ� �κ�

struct Query{
    int idx, x; ll t;
    Query(){}
    Query(int idx, int x, ll t): idx(idx), x(x), t(t){}
};
vector<Query> queries[200002];

void inputQuery(){
    scanf("%d", &q);
    for(int i=1; i<=q; i++){
        Query p;
        p.idx = i;
        scanf("%d %lld", &p.x, &p.t);
        queries[p.x].push_back(p);
    }
}

/// �� �Ʒ����� ������ ó���Ѵ�.

int getLCA(int x, int y){
    if(depth[x] > depth[y]) swap(x, y);
    for(int d=0; d<20; d++) if((depth[y]-depth[x])&(1<<d)) y = LCADB[y][d];
    if(x==y) return x;
    for(int d=19; d>=0; d--) if(LCADB[x][d] != LCADB[y][d]) x = LCADB[x][d], y = LCADB[y][d];
    return par[x];
}

int kthParent(int x, int k){
    for(int d=0; d<20; d++) if((k>>d)&1) x = LCADB[x][d];
    return x;
}


struct MergeSortTree{
    vector<ll> tree[1<<19];

    void init(int i, int l, int r, ll *A){
        if(l==r){
            tree[i] = vector<ll> (1, A[l]);
            return;
        }
        int m = (l+r)>>1;
        init(i*2, l, m, A);
        init(i*2+1, m+1, r, A);
        tree[i].resize(tree[i*2].size() + tree[i*2+1].size());
        merge(tree[i*2].begin(), tree[i*2].end(), tree[i*2+1].begin(), tree[i*2+1].end(), tree[i].begin());
    }

    ll query(int i, int l, int r, int s, int e, ll v){
        if(r<s || e<l) return 0;
        if(s<=l && r<=e){
            return upper_bound(tree[i].begin(), tree[i].end(), v) - tree[i].begin();
        }
        int m = (l+r)>>1;
        return query(i*2, l, m, s, e, v) + query(i*2+1, m+1, r, s, e, v);
    }
} mst;

vector<int> appleList[200002]; /// �� �������� �����ϴ� ��� ����
ll ans[200002];
int in[200002], out[200002], inCnt;
ll mstVal[200002];

void dfs1_search(int x){
    in[x] = inCnt + 1;
    for(auto p: appleList[x]){
        mstVal[++inCnt] = dist[x] + appleDelay[p];
    }
    for(auto y: child[x]){
        dfs1_search(y);
    }
    out[x] = inCnt;
}

void dfs1_answer(int x){
    if(!inCycle[x] && in[x] <= out[x]) for(Query &p: queries[x]){
        ans[p.idx] += mst.query(1, 1, inCnt, in[x], out[x], p.t + dist[p.x]);
    }
    for(auto p: child[x]){
        dfs1_answer(p);
    }
}

void solveCase1(int root){ /// Ʈ�� -> Ʈ���� �ذ��ϴ� �Լ�
    /// delay[i] + dist[i] <= t + dist[x]���� �����ϴٴ� ���� �̿���
    inCnt = 0;
    dfs1_search(root);
    if(!inCnt) return;
    mst.init(1, 1, inCnt, mstVal);
    dfs1_answer(root);
}

/// �� �Ʒ����� case 2

struct Fenwick{
    int n;
    ll tree[200002];

    void init(int _n){
        n = _n;
        for(int i=0; i<=n; i++) tree[i] = 0;
    }

    void add(int x, ll v){
        while(x<=n){
            tree[x] += v;
            x += x&-x;
        }
    }

    ll sum(int x){
        ll ret = 0;
        while(x){
            ret += tree[x];
            x -= x&-x;
        }
        return ret;
    }

    ll sum(int l, int r){
        if(l>r) return 0;
        return sum(r) - sum(l-1);
    }
} fenwick;

struct lazySegmentTree{
    ll sum[1<<21], lazy[1<<21];
    ll cnt[1<<21];

    void init(int i, int l, int r){
        sum[i] = lazy[i] = cnt[i] = 0;
        if(l==r) return;
        int m = (l+r)>>1;
        init(i*2, l, m);
        init(i*2+1, m+1, r);
    }

    void propagate(int i, int l, int r){
        sum[i] += lazy[i] * cnt[i];
        if(l!=r) lazy[i*2] += lazy[i], lazy[i*2+1] += lazy[i];
        lazy[i] = 0;
    }

    void update(int i, int l, int r, int x){
        propagate(i, l, r);
        if(l==r){
            sum[i]++, cnt[i]++;
            return;
        }
        int m = (l+r)>>1;
        if(x<=m) update(i*2, l, m, x), propagate(i*2+1, m+1, r);
        else update(i*2+1, m+1, r, x), propagate(i*2, l, m);
        sum[i] = sum[i*2] + sum[i*2+1], cnt[i] = cnt[i*2] + cnt[i*2+1];
    }

    void update(int i, int l, int r, int s, int e, ll v){
        propagate(i, l, r);
        if(r<s || e<l) return;
        if(s<=l && r<=e){
            lazy[i] = v;
            propagate(i, l, r);
            return;
        }
        int m = (l+r)>>1;
        update(i*2, l, m, s, e, v);
        update(i*2+1, m+1, r, s, e, v);
        sum[i] = sum[i*2] + sum[i*2+1], cnt[i] = cnt[i*2] + cnt[i*2+1];
    }

    ll query(int i, int l, int r, int s, int e){
        propagate(i, l, r);
        if(r<s || e<l) return 0;
        if(s<=l && r<=e) return sum[i];
        int m = (l+r)>>1;
        return query(i*2, l, m, s, e) + query(i*2+1, m+1, r, s, e);
    }
} segtree;

struct Event{
    int type; /// 0�̸� �� ����, 1�̸� ����
    ll val;
    int idx;
    Event(int type, ll val, int idx): type(type), val(val), idx(idx){}
    bool operator<(const Event &r)const{
        if(val != r.val) return val < r.val;
        else return type < r.type;
    }
};

vector<ll> puttingNumber[200002];

void solveCase2(int g){ /// ����Ŭ -> ����Ŭ�� �ذ��ϴ� �Լ�
    int s = (int)cycle[g].size();
    const ll MOD = cycleLength[g];

    for(int i=0; i<=s; i++) puttingNumber[i].clear();

    /// ���� ���������� ���� �� �κп� ���ؼ��� �غ�
    /// ����� ���� �������� ��� ����
    {
        vector<ll> renumber(1, -1e18);
        for(int i=1; i<s; i++){
            int x = cycle[g][i];
            for(int p: appleList[x]){
                ll v = appleDelay[p] - cycleT[g][i];
                puttingNumber[i].push_back(v);
                renumber.push_back(v);
            }
        }
        sort(renumber.begin(), renumber.end());
        renumber.erase(unique(renumber.begin(), renumber.end()), renumber.end());
        int r = (int)renumber.size() - 1;

        fenwick.init(r);
        for(int i=1; i<s; i++){
            for(ll p: puttingNumber[i]){
                int idx = lower_bound(renumber.begin(), renumber.end(), p) - renumber.begin();
                fenwick.add(idx, 1);
            }
            for(Query p: queries[cycle[g][i]]){
                int idx = upper_bound(renumber.begin(), renumber.end(), p.t - cycleT[g][i]) - renumber.begin() - 1;
                ans[p.idx] += fenwick.sum(1, idx);
            }
        }
    }

    /// �״��� ������������ ���� �ð��� ��� �����
    vector<ll> renumber;
    vector<Event> timeline;
    for(int i=0; i<s; i++){
        int x = cycle[g][i];
        for(int p: appleList[x]){
            ll v = appleDelay[p] + (i == 0 ? 0 : cycleLength[g] - cycleT[g][i]);
            renumber.push_back(v % MOD);
            timeline.push_back(Event(0, v, 0));
        }
        for(Query p: queries[x]){
            ll v = p.t - (i == 0 ? 0 : cycleT[g][i]);
            if(v<0) continue;
            timeline.push_back(Event(1, v, p.idx));
            renumber.push_back(v % MOD);
        }
    }
    sort(renumber.begin(), renumber.end());
    renumber.erase(unique(renumber.begin(), renumber.end()), renumber.end());
    sort(timeline.begin(), timeline.end());

    int r = (int)renumber.size();
    if(!r) return;
    segtree.init(1, 0, r-1);
    ll lastT = 0;
    for(Event p: timeline){
        if(lastT != p.val){ /// �ð��� ������Ʈ
            ll a1 = lastT / cycleLength[g], b1 = lastT % MOD;
            ll a2 = p.val / cycleLength[g], b2 = p.val % MOD;
            int idx1 = lower_bound(renumber.begin(), renumber.end(), b1) - renumber.begin() + 1;
            int idx2 = lower_bound(renumber.begin(), renumber.end(), b2) - renumber.begin();

            if(a1 == a2){
                segtree.update(1, 0, r-1, idx1, idx2, 1);
            }
            else{
                segtree.update(1, 0, r-1, idx1, r-1, 1);
                if(a2-a1>1) segtree.update(1, 0, r-1, 0, r-1, a2-a1-1);
                segtree.update(1, 0, r-1, 0, idx2, 1);
            }

            lastT = p.val;
        }
        int idx = lower_bound(renumber.begin(), renumber.end(), p.val%cycleLength[g]) - renumber.begin();
        if(p.type == 0){ /// �߰�
            segtree.update(1, 0, r-1, idx);
        }
        else{ /// ����
            ans[p.idx] += segtree.query(1, 0, r-1, 0, r-1);
        }
    }
}

void solve(){ /// ������ ó���ϴ� �Լ�
    /// �� ���� �ʱ�ȭ
    for(int i=1; i<=k; i++){
        int x = appleTo[i];
        appleList[x].push_back(i);
    }

    /// Session 1. Ʈ�� -> Ʈ��
    for(int i=1; i<=n; i++){
        if(inCycle[i] && !child[i].empty()) solveCase1(i);
    }

    /// Ʈ�� ������ ����Ŭ�� �Ѱ���
    for(int i=1; i<=k; i++){
        int x = appleTo[i];
        if(inCycle[x]) continue;
        appleDelay[i] += dist[x], x = cycle[cycleNum[x]][cycleIdx[x]];
        appleList[x].push_back(i);
    }

    /// Session 2. ����Ŭ -> ����Ŭ
    for(int i=1; i<=n; i++){
        if(inCycle[i] && cycleIdx[i] == 0) solveCase2(i);
    }
}

void output(){
    for(int i=1; i<=q; i++){
        printf("%lld\n", ans[i]);
    }
}

Compilation message

harvest.cpp: In function 'void input()':
harvest.cpp:29:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   29 |     scanf("%d %d %lld %lld", &n, &k, &L, &C);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
harvest.cpp:30:34: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |     for(int i=1; i<=n; i++) scanf("%lld", &a[i]);
      |                             ~~~~~^~~~~~~~~~~~~~~
harvest.cpp:31:34: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   31 |     for(int i=1; i<=k; i++) scanf("%lld", &b[i]);
      |                             ~~~~~^~~~~~~~~~~~~~~
harvest.cpp: In function 'void inputQuery()':
harvest.cpp:156:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  156 |     scanf("%d", &q);
      |     ~~~~~^~~~~~~~~~
harvest.cpp:160:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  160 |         scanf("%d %lld", &p.x, &p.t);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	26 ms	41308 KB	Output is correct
2	Correct	24 ms	41676 KB	Output is correct
3	Correct	26 ms	42340 KB	Output is correct
4	Correct	26 ms	42280 KB	Output is correct
5	Correct	27 ms	42884 KB	Output is correct
6	Correct	26 ms	42964 KB	Output is correct
7	Correct	25 ms	42992 KB	Output is correct
8	Correct	23 ms	42324 KB	Output is correct
9	Correct	23 ms	42352 KB	Output is correct
10	Correct	23 ms	42292 KB	Output is correct
11	Correct	30 ms	42324 KB	Output is correct
12	Correct	23 ms	41940 KB	Output is correct
13	Correct	25 ms	42316 KB	Output is correct
14	Correct	25 ms	41920 KB	Output is correct
15	Correct	28 ms	42708 KB	Output is correct
16	Correct	23 ms	42752 KB	Output is correct
17	Correct	24 ms	42836 KB	Output is correct
18	Correct	23 ms	42764 KB	Output is correct
19	Correct	25 ms	42792 KB	Output is correct
20	Correct	24 ms	42752 KB	Output is correct

Subtask #2
20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	292 ms	60064 KB	Output is correct
2	Correct	212 ms	86256 KB	Output is correct
3	Correct	218 ms	90632 KB	Output is correct
4	Correct	414 ms	108896 KB	Output is correct
5	Correct	223 ms	123048 KB	Output is correct
6	Correct	202 ms	123012 KB	Output is correct
7	Correct	168 ms	82656 KB	Output is correct
8	Correct	155 ms	82600 KB	Output is correct
9	Correct	417 ms	99244 KB	Output is correct
10	Correct	381 ms	96900 KB	Output is correct
11	Correct	425 ms	99308 KB	Output is correct
12	Correct	420 ms	99260 KB	Output is correct
13	Correct	462 ms	99356 KB	Output is correct
14	Correct	374 ms	96936 KB	Output is correct
15	Correct	401 ms	90376 KB	Output is correct
16	Correct	246 ms	102776 KB	Output is correct
17	Correct	203 ms	102632 KB	Output is correct
18	Correct	133 ms	64184 KB	Output is correct
19	Correct	117 ms	64284 KB	Output is correct
20	Correct	188 ms	83500 KB	Output is correct

Subtask #3
75.0 / 75.0

#	결과	실행 시간	메모리	Grader output
1	Correct	26 ms	41308 KB	Output is correct
2	Correct	24 ms	41676 KB	Output is correct
3	Correct	26 ms	42340 KB	Output is correct
4	Correct	26 ms	42280 KB	Output is correct
5	Correct	27 ms	42884 KB	Output is correct
6	Correct	26 ms	42964 KB	Output is correct
7	Correct	25 ms	42992 KB	Output is correct
8	Correct	23 ms	42324 KB	Output is correct
9	Correct	23 ms	42352 KB	Output is correct
10	Correct	23 ms	42292 KB	Output is correct
11	Correct	30 ms	42324 KB	Output is correct
12	Correct	23 ms	41940 KB	Output is correct
13	Correct	25 ms	42316 KB	Output is correct
14	Correct	25 ms	41920 KB	Output is correct
15	Correct	28 ms	42708 KB	Output is correct
16	Correct	23 ms	42752 KB	Output is correct
17	Correct	24 ms	42836 KB	Output is correct
18	Correct	23 ms	42764 KB	Output is correct
19	Correct	25 ms	42792 KB	Output is correct
20	Correct	24 ms	42752 KB	Output is correct
21	Correct	292 ms	60064 KB	Output is correct
22	Correct	212 ms	86256 KB	Output is correct
23	Correct	218 ms	90632 KB	Output is correct
24	Correct	414 ms	108896 KB	Output is correct
25	Correct	223 ms	123048 KB	Output is correct
26	Correct	202 ms	123012 KB	Output is correct
27	Correct	168 ms	82656 KB	Output is correct
28	Correct	155 ms	82600 KB	Output is correct
29	Correct	417 ms	99244 KB	Output is correct
30	Correct	381 ms	96900 KB	Output is correct
31	Correct	425 ms	99308 KB	Output is correct
32	Correct	420 ms	99260 KB	Output is correct
33	Correct	462 ms	99356 KB	Output is correct
34	Correct	374 ms	96936 KB	Output is correct
35	Correct	401 ms	90376 KB	Output is correct
36	Correct	246 ms	102776 KB	Output is correct
37	Correct	203 ms	102632 KB	Output is correct
38	Correct	133 ms	64184 KB	Output is correct
39	Correct	117 ms	64284 KB	Output is correct
40	Correct	188 ms	83500 KB	Output is correct
41	Correct	437 ms	129992 KB	Output is correct
42	Correct	259 ms	94056 KB	Output is correct
43	Correct	273 ms	105152 KB	Output is correct
44	Correct	430 ms	129936 KB	Output is correct
45	Correct	481 ms	187912 KB	Output is correct
46	Correct	482 ms	188672 KB	Output is correct
47	Correct	492 ms	189188 KB	Output is correct
48	Correct	445 ms	186844 KB	Output is correct
49	Correct	415 ms	186972 KB	Output is correct
50	Correct	396 ms	148556 KB	Output is correct
51	Correct	385 ms	147764 KB	Output is correct
52	Correct	468 ms	130424 KB	Output is correct
53	Correct	722 ms	132092 KB	Output is correct
54	Correct	475 ms	129828 KB	Output is correct
55	Correct	409 ms	113428 KB	Output is correct
56	Correct	643 ms	170552 KB	Output is correct
57	Correct	515 ms	171400 KB	Output is correct
58	Correct	633 ms	172184 KB	Output is correct
59	Correct	469 ms	169056 KB	Output is correct
60	Correct	524 ms	169376 KB	Output is correct
61	Correct	475 ms	169280 KB	Output is correct
62	Correct	663 ms	115152 KB	Output is correct
63	Correct	369 ms	127640 KB	Output is correct
64	Correct	360 ms	127740 KB	Output is correct
65	Correct	393 ms	127868 KB	Output is correct
66	Correct	340 ms	127856 KB	Output is correct
67	Correct	353 ms	127860 KB	Output is correct
68	Correct	332 ms	127324 KB	Output is correct
69	Correct	461 ms	126068 KB	Output is correct
70	Correct	439 ms	120264 KB	Output is correct
71	Correct	448 ms	132976 KB	Output is correct
72	Correct	464 ms	146308 KB	Output is correct

답안 #800003

Compilation message

Subtask #1 5.0 / 5.0

Subtask #2 20.0 / 20.0

Subtask #3 75.0 / 75.0

Subtask #1
5.0 / 5.0

Subtask #2
20.0 / 20.0

Subtask #3
75.0 / 75.0