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답안 #369625

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
369625 2021-02-22T06:24:37 Z 79brue Examination (JOI19_examination) C++14
100 / 100
 956 ms 81400 KB 
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

int n, q;
ll x[100002], y[100002];
ll qa[100002], qb[100002], qc[100002];
int ans[100002]; /// 아주 중요한 배열
bool chk[100002];

void solve1();
void solve2();
void solve3();
void solve4();

int main(){
    scanf("%d %d", &n, &q);
    for(int i=1; i<=n; i++){
        scanf("%lld %lld", &x[i], &y[i]);
    }
    for(int i=1; i<=q; i++){
        scanf("%lld %lld %lld", &qa[i], &qb[i], &qc[i]);
        ans[i] = n;
        if(qa[i] + qb[i] >= qc[i]) chk[i] = 1;
    }

    solve1();
    solve2();
    solve3();
    solve4();

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

void solve1(){
    vector<ll> vec;
    for(int i=1; i<=n; i++){
        vec.push_back(x[i]+y[i]);
    }
    sort(vec.begin(), vec.end());

    for(int i=1; i<=q; i++){
        ans[i] -= lower_bound(vec.begin(), vec.end(), qc[i]) - vec.begin();
    }
}

struct Node{
    Node *l, *r;
    ll s, e;
    int val;

    Node(ll _s, ll _e){
        l = r = nullptr;
        s = _s, e = _e;
        val = 0;
    }
    ~Node(){
        if(l) delete l;
        if(r) delete r;
    }

    void update(ll idx){
        if(s==e){
            val++;
            return;
        }
        ll m = (s+e)>>1;
        if(idx <= m){
            if(!l) l = new Node(s, m);
            l->update(idx);
        }
        else{
            if(!r) r = new Node(m+1, e);
            r->update(idx);
        }
        val++;
    }

    int sum(ll ts, ll te){
        if(e < ts || te < s) return 0;
        if(ts <= s && e <= te) return val;
        int ret = 0;
        if(l) ret += l->sum(ts, te);
        if(r) ret += r->sum(ts, te);
        return ret;
    }
};

struct segTree{
    Node* root;
    segTree(){
        root = new Node(0LL, 1000000000LL);
    }
    ~segTree(){
        delete root;
    }

    void update(int idx){
        root->update(idx);
    }
    int sum(ll s, ll e){
        return root->sum(s, e);
    }
};

struct Query{
    ll key; /// 정렬 기준이 될 것이다.
    int type; /// 0: 점 추가, 1: 쿼리 처리
    ll x; /// 점 추가일 경우: x좌표 (segment tree에서의 idx) | 쿼리 처리일 경우 x의 최댓값
    int idx; /// 쿼리 처리일 경우: 쿼리의 번호

    Query(){}
    Query(ll key, int type, ll x): key(key), type(type), x(x){}
    Query(ll key, int type, ll x, int idx): key(key), type(type), x(x), idx(idx){}

    bool operator<(const Query &r)const{
        if(key != r.key) return key>r.key;
        return type < r.type; /// 점 추가가 더 우선된다.
    }
};

void solve2(){
    /// x <= qa[i]-1, x+y >= qc[i] 인 것을 모두 찾는다.
    segTree tree;
    vector<Query> vec;

    for(int i=1; i<=n; i++){
        vec.push_back(Query(x[i]+y[i], 0, x[i]));
    }
    for(int i=1; i<=q; i++){
        if(!chk[i]){
            vec.push_back(Query(qc[i], 1, qa[i]-1, i));
        }
    }

    sort(vec.begin(), vec.end());
    for(Query query: vec){
        if(query.type == 0){ /// 점 추가 쿼리
            tree.update(query.x);
        }
        else{ /// 쿼리 답 구하기
            ans[query.idx] -= tree.sum(0, query.x);
        }
    }
}

void solve3(){
    /// y <= qb[i]-1, x+y >= qc[i] 인 것을 모두 찾는다.
    segTree tree;
    vector<Query> vec;

    for(int i=1; i<=n; i++){
        vec.push_back(Query(x[i]+y[i], 0, y[i]));
    }
    for(int i=1; i<=q; i++){
        if(!chk[i]){
            vec.push_back(Query(qc[i], 1, qb[i]-1, i));
        }
    }

    sort(vec.begin(), vec.end());
    for(Query query: vec){
        if(query.type == 0){ /// 점 추가 쿼리
            tree.update(query.x);
        }
        else{ /// 쿼리 답 구하기
            ans[query.idx] -= tree.sum(0, query.x);
        }
    }
}

void solve4(){
    /// 특수한 경우의 해를 빠르게 찾는다.
    segTree tree;
    vector<Query> vec;

    for(int i=1; i<=n; i++){
        vec.push_back(Query(y[i], 0, x[i]));
    }
    for(int i=1; i<=q; i++){
        if(chk[i]){
            vec.push_back(Query(qb[i], 1, qa[i], i));
        }
    }

    sort(vec.begin(), vec.end(), [&](auto p1, auto p2){
        if(p1.key != p2.key) return p1.key > p2.key;
        return p1.type < p2.type;
    });

    for(Query query: vec){
        if(query.type == 0){
            tree.update(query.x);
        }
        else{
            ans[query.idx] = tree.sum(query.x, 1000000000);
        }
    }
}

Compilation message

examination.cpp: In function 'int main()':
examination.cpp:19:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   19 |     scanf("%d %d", &n, &q);
      |     ~~~~~^~~~~~~~~~~~~~~~~
examination.cpp:21:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   21 |         scanf("%lld %lld", &x[i], &y[i]);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
examination.cpp:24:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   24 |         scanf("%lld %lld %lld", &qa[i], &qb[i], &qc[i]);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
2.0 / 2.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 22 ms 3512 KB Output is correct
8 Correct 21 ms 3544 KB Output is correct
9 Correct 21 ms 3484 KB Output is correct
10 Correct 17 ms 3432 KB Output is correct
11 Correct 15 ms 3416 KB Output is correct
12 Correct 8 ms 908 KB Output is correct
13 Correct 21 ms 3544 KB Output is correct
14 Correct 20 ms 3460 KB Output is correct
15 Correct 21 ms 3596 KB Output is correct
16 Correct 11 ms 3488 KB Output is correct
17 Correct 17 ms 3360 KB Output is correct
18 Correct 6 ms 908 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 390 ms 21508 KB Output is correct
2 Correct 371 ms 21508 KB Output is correct
3 Correct 416 ms 21652 KB Output is correct
4 Correct 277 ms 18328 KB Output is correct
5 Correct 221 ms 22716 KB Output is correct
6 Correct 177 ms 17100 KB Output is correct
7 Correct 355 ms 22552 KB Output is correct
8 Correct 349 ms 21380 KB Output is correct
9 Correct 352 ms 21380 KB Output is correct
10 Correct 199 ms 22500 KB Output is correct
11 Correct 256 ms 18308 KB Output is correct
12 Correct 151 ms 17072 KB Output is correct

Subtask #3
21.0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 390 ms 21508 KB Output is correct
2 Correct 371 ms 21508 KB Output is correct
3 Correct 416 ms 21652 KB Output is correct
4 Correct 277 ms 18328 KB Output is correct
5 Correct 221 ms 22716 KB Output is correct
6 Correct 177 ms 17100 KB Output is correct
7 Correct 355 ms 22552 KB Output is correct
8 Correct 349 ms 21380 KB Output is correct
9 Correct 352 ms 21380 KB Output is correct
10 Correct 199 ms 22500 KB Output is correct
11 Correct 256 ms 18308 KB Output is correct
12 Correct 151 ms 17072 KB Output is correct
13 Correct 378 ms 21276 KB Output is correct
14 Correct 404 ms 21496 KB Output is correct
15 Correct 401 ms 21636 KB Output is correct
16 Correct 325 ms 21464 KB Output is correct
17 Correct 241 ms 21476 KB Output is correct
18 Correct 185 ms 17104 KB Output is correct
19 Correct 436 ms 20844 KB Output is correct
20 Correct 384 ms 21356 KB Output is correct
21 Correct 398 ms 21960 KB Output is correct
22 Correct 198 ms 22404 KB Output is correct
23 Correct 259 ms 18444 KB Output is correct
24 Correct 148 ms 17100 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 22 ms 3512 KB Output is correct
8 Correct 21 ms 3544 KB Output is correct
9 Correct 21 ms 3484 KB Output is correct
10 Correct 17 ms 3432 KB Output is correct
11 Correct 15 ms 3416 KB Output is correct
12 Correct 8 ms 908 KB Output is correct
13 Correct 21 ms 3544 KB Output is correct
14 Correct 20 ms 3460 KB Output is correct
15 Correct 21 ms 3596 KB Output is correct
16 Correct 11 ms 3488 KB Output is correct
17 Correct 17 ms 3360 KB Output is correct
18 Correct 6 ms 908 KB Output is correct
19 Correct 390 ms 21508 KB Output is correct
20 Correct 371 ms 21508 KB Output is correct
21 Correct 416 ms 21652 KB Output is correct
22 Correct 277 ms 18328 KB Output is correct
23 Correct 221 ms 22716 KB Output is correct
24 Correct 177 ms 17100 KB Output is correct
25 Correct 355 ms 22552 KB Output is correct
26 Correct 349 ms 21380 KB Output is correct
27 Correct 352 ms 21380 KB Output is correct
28 Correct 199 ms 22500 KB Output is correct
29 Correct 256 ms 18308 KB Output is correct
30 Correct 151 ms 17072 KB Output is correct
31 Correct 378 ms 21276 KB Output is correct
32 Correct 404 ms 21496 KB Output is correct
33 Correct 401 ms 21636 KB Output is correct
34 Correct 325 ms 21464 KB Output is correct
35 Correct 241 ms 21476 KB Output is correct
36 Correct 185 ms 17104 KB Output is correct
37 Correct 436 ms 20844 KB Output is correct
38 Correct 384 ms 21356 KB Output is correct
39 Correct 398 ms 21960 KB Output is correct
40 Correct 198 ms 22404 KB Output is correct
41 Correct 259 ms 18444 KB Output is correct
42 Correct 148 ms 17100 KB Output is correct
43 Correct 862 ms 81240 KB Output is correct
44 Correct 862 ms 81268 KB Output is correct
45 Correct 903 ms 81400 KB Output is correct
46 Correct 652 ms 77868 KB Output is correct
47 Correct 384 ms 77788 KB Output is correct
48 Correct 183 ms 18704 KB Output is correct
49 Correct 871 ms 81264 KB Output is correct
50 Correct 956 ms 81336 KB Output is correct
51 Correct 909 ms 80760 KB Output is correct
52 Correct 359 ms 77660 KB Output is correct
53 Correct 569 ms 78948 KB Output is correct