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Submission #375068

# Submission time Handle Problem Language Result Execution time Memory
375068 2021-03-09T02:08:08 Z wiwiho Examination (JOI19_examination) C++14
2 / 100
 3000 ms 10492 KB 
#include <bits/stdc++.h>

#define eb emplace_back
#define iter(a) a.begin(), a.end()
#define printv(a, b) { \
    for(auto pv : a) b << pv << " "; \
    b << "\n"; \
}

using namespace std;

typedef long long ll;

vector<int> BIT;

int lowbit(int x){
    return x & -x;
}

void modify(int x, int v){
    assert(x != 0);
    for(; x < BIT.size(); x += lowbit(x)){
        BIT[x] += v;
    }
}

int query(int x){
    int ans = 0;
    for(; x > 0; x -= lowbit(x)){
        ans += BIT[x];
    }
    return ans;
}

vector<int> tv;

struct OAO{
    int x = 0, y = 0, z = 0, type = -1;
    OAO(int x = 0, int y = 0, int z = 0, int type = -1):
            x(x), y(y), z(z), type(type) {}
    void upd(){
        x = lower_bound(iter(tv), x, greater<>()) - tv.begin() + 1;
        y = lower_bound(iter(tv), y, greater<>()) - tv.begin() + 1;
        z = lower_bound(iter(tv), z, greater<>()) - tv.begin() + 1;
    }
};

bool comp(OAO a, OAO b){
    if(a.x == b.x) return a.type == -1;
    return a.x < b.x;
}

ostream& operator<<(ostream& o, OAO oao){
    return o << '(' << oao.x << ',' << oao.y << ',' << oao.z << ',' << oao.type << ')';
}

vector<int> ans;
vector<OAO> b;
void cdq(vector<OAO>& a, int l, int r){
    if(l >= r) return;
    int m = (l + r) / 2;
    cdq(a, l, m);
    cdq(a, m + 1, r);
    //cerr << "test " << l << " " << r << "\n";
    //printv(a, cerr);
    //for(int i = 1; i < BIT.size(); i++) cerr << query(i) << " ";
    //cerr << "\n";

    int lp = l, rp = m + 1;
    int bp = l;
    while(lp <= m && rp <= r){
        if(a[lp].y <= a[rp].y){
            if(a[lp].type == -1){
                modify(a[lp].z, 1);
            }
            b[bp] = a[lp];
            lp++;
        }
        else{
            if(a[rp].type != -1){
                ans[a[rp].type] += query(a[rp].z);
            }
            b[bp] = a[rp];
            rp++;
        }
        bp++;
    }
    while(lp <= m){
        if(a[lp].type == -1){
            modify(a[lp].z, 1);
        }
        b[bp] = a[lp];
        lp++;
        bp++;
    }
    while(rp <= r){
        if(a[rp].type != -1){
            ans[a[rp].type] += query(a[rp].z);
        }
        b[bp] = a[rp];
        rp++;
        bp++;
    }

    for(int i = l; i <= m; i++){
        if(a[i].type == -1) modify(a[i].z, -1);
    }

    for(int i = l; i <= r; i++) a[i] = b[i];
}

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);

    int n, q;
    cin >> n >> q;
    ans.resize(q);
    tv.reserve(3 * (n + q));
    
    vector<OAO> a;
    a.reserve(n + q);
    for(int i = 0; i < n; i++){
        int s, t;
        cin >> s >> t;
        a.eb(OAO(s, t, s + t, -1));
        tv.eb(s);
        tv.eb(t);
        tv.eb(s + t);
    }

    for(int i = 0; i < q; i++){
        int x, y, z;
        cin >> x >> y >> z;
        a.eb(OAO(x, y, z, i));
        tv.eb(x);
        tv.eb(y);
        tv.eb(z);
    }

    sort(iter(tv), greater<>());
    tv.resize(unique(iter(tv)) - tv.begin());
    BIT.resize(tv.size() + 1);
    b.resize(a.size());

    for(auto& i : a){
        i.upd();
    }
    sort(iter(a), comp);
    //printv(tv, cerr);

    cdq(a, 0, (int)a.size() - 1);

    for(int i = 0; i < q; i++) cout << ans[i] << "\n";

    return 0;
}

Compilation message

examination.cpp: In function 'void modify(int, int)':
examination.cpp:22:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |     for(; x < BIT.size(); x += lowbit(x)){
      |           ~~^~~~~~~~~~~~

Subtask #1
2.0 / 2.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 512 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 9 ms 748 KB Output is correct
8 Correct 11 ms 748 KB Output is correct
9 Correct 9 ms 748 KB Output is correct
10 Correct 8 ms 620 KB Output is correct
11 Correct 10 ms 620 KB Output is correct
12 Correct 7 ms 620 KB Output is correct
13 Correct 8 ms 620 KB Output is correct
14 Correct 8 ms 620 KB Output is correct
15 Correct 10 ms 620 KB Output is correct
16 Correct 24 ms 620 KB Output is correct
17 Correct 7 ms 620 KB Output is correct
18 Correct 19 ms 620 KB Output is correct

Subtask #2
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 324 ms 10476 KB Output is correct
2 Correct 328 ms 10476 KB Output is correct
3 Correct 322 ms 10488 KB Output is correct
4 Correct 260 ms 10300 KB Output is correct
5 Correct 1633 ms 10348 KB Output is correct
6 Correct 1521 ms 10024 KB Output is correct
7 Correct 295 ms 10492 KB Output is correct
8 Correct 295 ms 10476 KB Output is correct
9 Correct 292 ms 10476 KB Output is correct
10 Execution timed out 3043 ms 9708 KB Time limit exceeded
11 Halted 0 ms 0 KB -

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 324 ms 10476 KB Output is correct
2 Correct 328 ms 10476 KB Output is correct
3 Correct 322 ms 10488 KB Output is correct
4 Correct 260 ms 10300 KB Output is correct
5 Correct 1633 ms 10348 KB Output is correct
6 Correct 1521 ms 10024 KB Output is correct
7 Correct 295 ms 10492 KB Output is correct
8 Correct 295 ms 10476 KB Output is correct
9 Correct 292 ms 10476 KB Output is correct
10 Execution timed out 3043 ms 9708 KB Time limit exceeded
11 Halted 0 ms 0 KB -

Subtask #4
0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 512 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 9 ms 748 KB Output is correct
8 Correct 11 ms 748 KB Output is correct
9 Correct 9 ms 748 KB Output is correct
10 Correct 8 ms 620 KB Output is correct
11 Correct 10 ms 620 KB Output is correct
12 Correct 7 ms 620 KB Output is correct
13 Correct 8 ms 620 KB Output is correct
14 Correct 8 ms 620 KB Output is correct
15 Correct 10 ms 620 KB Output is correct
16 Correct 24 ms 620 KB Output is correct
17 Correct 7 ms 620 KB Output is correct
18 Correct 19 ms 620 KB Output is correct
19 Correct 324 ms 10476 KB Output is correct
20 Correct 328 ms 10476 KB Output is correct
21 Correct 322 ms 10488 KB Output is correct
22 Correct 260 ms 10300 KB Output is correct
23 Correct 1633 ms 10348 KB Output is correct
24 Correct 1521 ms 10024 KB Output is correct
25 Correct 295 ms 10492 KB Output is correct
26 Correct 295 ms 10476 KB Output is correct
27 Correct 292 ms 10476 KB Output is correct
28 Execution timed out 3043 ms 9708 KB Time limit exceeded
29 Halted 0 ms 0 KB -