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Submission #375058

# Submission time Handle Problem Language Result Execution time Memory
375058 2021-03-09T01:53:17 Z wiwiho Examination (JOI19_examination) C++14
2 / 100
 3000 ms 13820 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){
    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;
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";

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

    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 - l];
}

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

    int n, q;
    cin >> n >> q;
    ans.resize(q);
    
    vector<OAO> a;
    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);

    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:21:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |     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 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 12 ms 1004 KB Output is correct
8 Correct 10 ms 1004 KB Output is correct
9 Correct 10 ms 1004 KB Output is correct
10 Correct 9 ms 908 KB Output is correct
11 Correct 11 ms 908 KB Output is correct
12 Correct 8 ms 876 KB Output is correct
13 Correct 9 ms 1004 KB Output is correct
14 Correct 10 ms 1004 KB Output is correct
15 Correct 10 ms 1004 KB Output is correct
16 Correct 20 ms 1004 KB Output is correct
17 Correct 8 ms 908 KB Output is correct
18 Correct 20 ms 896 KB Output is correct

Subtask #2
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 365 ms 13820 KB Output is correct
2 Correct 369 ms 13148 KB Output is correct
3 Correct 366 ms 12924 KB Output is correct
4 Correct 312 ms 12976 KB Output is correct
5 Correct 1671 ms 12824 KB Output is correct
6 Correct 1528 ms 12424 KB Output is correct
7 Correct 339 ms 13096 KB Output is correct
8 Correct 348 ms 12932 KB Output is correct
9 Correct 330 ms 12932 KB Output is correct
10 Execution timed out 3099 ms 7756 KB Time limit exceeded
11 Halted 0 ms 0 KB -

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 365 ms 13820 KB Output is correct
2 Correct 369 ms 13148 KB Output is correct
3 Correct 366 ms 12924 KB Output is correct
4 Correct 312 ms 12976 KB Output is correct
5 Correct 1671 ms 12824 KB Output is correct
6 Correct 1528 ms 12424 KB Output is correct
7 Correct 339 ms 13096 KB Output is correct
8 Correct 348 ms 12932 KB Output is correct
9 Correct 330 ms 12932 KB Output is correct
10 Execution timed out 3099 ms 7756 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 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 12 ms 1004 KB Output is correct
8 Correct 10 ms 1004 KB Output is correct
9 Correct 10 ms 1004 KB Output is correct
10 Correct 9 ms 908 KB Output is correct
11 Correct 11 ms 908 KB Output is correct
12 Correct 8 ms 876 KB Output is correct
13 Correct 9 ms 1004 KB Output is correct
14 Correct 10 ms 1004 KB Output is correct
15 Correct 10 ms 1004 KB Output is correct
16 Correct 20 ms 1004 KB Output is correct
17 Correct 8 ms 908 KB Output is correct
18 Correct 20 ms 896 KB Output is correct
19 Correct 365 ms 13820 KB Output is correct
20 Correct 369 ms 13148 KB Output is correct
21 Correct 366 ms 12924 KB Output is correct
22 Correct 312 ms 12976 KB Output is correct
23 Correct 1671 ms 12824 KB Output is correct
24 Correct 1528 ms 12424 KB Output is correct
25 Correct 339 ms 13096 KB Output is correct
26 Correct 348 ms 12932 KB Output is correct
27 Correct 330 ms 12932 KB Output is correct
28 Execution timed out 3099 ms 7756 KB Time limit exceeded
29 Halted 0 ms 0 KB -