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Submission #361313

# Submission time Handle Problem Language Result Execution time Memory
361313 2021-01-29T08:58:32 Z shahriarkhan Examination (JOI19_examination) C++14
100 / 100
 1250 ms 55156 KB 
#include<bits/stdc++.h>
using namespace std ;

const int mx = 2e5 + 5 ;

int ans[mx] , cnt_a , cnt_b , n , q ;

map<int,int> np , mp ;

set<int> A , B ;

struct BIT
{
    vector<int> t ;
    BIT(int n)
    {
        t = vector<int> (n + 5 , 0) ;
    }
    void update(int ind , int val)
    {
        while(ind<=mx)
        {
            t[ind] += val ;
            ind += (ind&(-ind)) ;
        }
    }
    int query(int l , int r)
    {
        --l ;
        int left = 0 , right = 0 ;
        while(l)
        {
            left += t[l] ;
            l -= (l&(-l)) ;
        }
        while(r)
        {
            right += t[r] ;
            r -= (r&(-r)) ;
        }
        return right - left ;
    }
} T(mx+5) ;

struct score
{
    int a , b , sum , type , idx ;
    score(int _a , int _b , int _sum , int _type , int _idx) : a(_a) , b(_b) , sum(_sum) , type(_type) , idx(_idx) {} ;

};

bool cmp1(const score &a , const score &b)
{
    if(a.sum==b.sum) return a.type < b.type ;
    return a.sum > b.sum ;
}

bool cmp2(const score &a , const score &b)
{
    if(a.a==b.a) return a.type < b.type ;
    return a.a > b.a ;
}

vector<score> scores ;

void divide(int l , int r)
{
    if(l==r) return ;
    int mid = (l+r)>>1 ;
    vector<score> tmp ;
    for(int i = l ; i <= mid ; ++i)
    {
        if(!scores[i].type) tmp.push_back(scores[i]) ;
    }
    for(int i = mid + 1 ; i <= r ; ++i)
    {
        if(scores[i].type) tmp.push_back(scores[i]) ;
    }
	sort(tmp.begin(),tmp.end() , cmp2) ;
    int siz = tmp.size() ;
    for(int i = 0 ; i < siz ; ++i)
    {
        if(!tmp[i].type) T.update(tmp[i].b,1) ;
        else ans[tmp[i].idx] += T.query(tmp[i].b,mx) ;
    }
    for(int i = 0 ; i < siz ; ++i)
    {
        if(!tmp[i].type) T.update(tmp[i].b,-1) ;
    }
    divide(l,mid) , divide(mid+1,r) ;
}

int main()
{
    scanf("%d%d",&n,&q) ;
    for(int i = 1 ; i <= n ; ++i)
    {
        int s , t ;
        scanf("%d%d",&s,&t) ;
        A.insert(s) , B.insert(t) ;
        scores.push_back(score(s,t,s+t,0,-1)) ;
    }
    for(int i = 1 ; i <= q ; ++i)
    {
        int x , y , z ;
        scanf("%d%d%d",&x,&y,&z) ;
        A.insert(x) , B.insert(y) ;
        scores.push_back(score(x,y,z,1,i)) ;
    }

    for(int i : A) np[i] = ++cnt_a ;
    for(int i : B) mp[i] = ++cnt_b ;

    for(int i = 0 ; i < (n+q) ; ++i)
    {
        scores[i].a = np[scores[i].a] , scores[i].b = mp[scores[i].b] ;
    }
    sort(scores.begin(),scores.end(),cmp1) ;
    divide(0,n+q-1) ;
    for(int i = 1 ; i <= q ; ++i) printf("%d\n",ans[i]) ;
    return 0 ;
}

Compilation message

examination.cpp: In function 'int main()':
examination.cpp:95:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   95 |     scanf("%d%d",&n,&q) ;
      |     ~~~~~^~~~~~~~~~~~~~
examination.cpp:99:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   99 |         scanf("%d%d",&s,&t) ;
      |         ~~~~~^~~~~~~~~~~~~~
examination.cpp:106:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  106 |         scanf("%d%d%d",&x,&y,&z) ;
      |         ~~~~~^~~~~~~~~~~~~~~~~~~

Subtask #1
2.0 / 2.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1132 KB Output is correct
2 Correct 1 ms 1132 KB Output is correct
3 Correct 1 ms 1132 KB Output is correct
4 Correct 1 ms 1132 KB Output is correct
5 Correct 1 ms 1132 KB Output is correct
6 Correct 1 ms 1132 KB Output is correct
7 Correct 16 ms 2668 KB Output is correct
8 Correct 16 ms 2668 KB Output is correct
9 Correct 18 ms 2796 KB Output is correct
10 Correct 12 ms 2028 KB Output is correct
11 Correct 15 ms 2028 KB Output is correct
12 Correct 10 ms 1488 KB Output is correct
13 Correct 17 ms 2768 KB Output is correct
14 Correct 15 ms 2768 KB Output is correct
15 Correct 15 ms 2768 KB Output is correct
16 Correct 11 ms 2156 KB Output is correct
17 Correct 12 ms 2176 KB Output is correct
18 Correct 7 ms 1484 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 833 ms 31600 KB Output is correct
2 Correct 790 ms 31508 KB Output is correct
3 Correct 822 ms 31512 KB Output is correct
4 Correct 498 ms 22640 KB Output is correct
5 Correct 465 ms 22896 KB Output is correct
6 Correct 315 ms 13780 KB Output is correct
7 Correct 694 ms 29552 KB Output is correct
8 Correct 722 ms 29708 KB Output is correct
9 Correct 629 ms 27912 KB Output is correct
10 Correct 438 ms 22640 KB Output is correct
11 Correct 475 ms 22640 KB Output is correct
12 Correct 273 ms 13776 KB Output is correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 833 ms 31600 KB Output is correct
2 Correct 790 ms 31508 KB Output is correct
3 Correct 822 ms 31512 KB Output is correct
4 Correct 498 ms 22640 KB Output is correct
5 Correct 465 ms 22896 KB Output is correct
6 Correct 315 ms 13780 KB Output is correct
7 Correct 694 ms 29552 KB Output is correct
8 Correct 722 ms 29708 KB Output is correct
9 Correct 629 ms 27912 KB Output is correct
10 Correct 438 ms 22640 KB Output is correct
11 Correct 475 ms 22640 KB Output is correct
12 Correct 273 ms 13776 KB Output is correct
13 Correct 838 ms 29808 KB Output is correct
14 Correct 795 ms 31856 KB Output is correct
15 Correct 855 ms 31604 KB Output is correct
16 Correct 508 ms 21744 KB Output is correct
17 Correct 485 ms 20840 KB Output is correct
18 Correct 308 ms 13780 KB Output is correct
19 Correct 829 ms 29808 KB Output is correct
20 Correct 809 ms 30832 KB Output is correct
21 Correct 755 ms 28272 KB Output is correct
22 Correct 403 ms 22640 KB Output is correct
23 Correct 475 ms 22664 KB Output is correct
24 Correct 262 ms 13776 KB Output is correct

Subtask #4
57.0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1132 KB Output is correct
2 Correct 1 ms 1132 KB Output is correct
3 Correct 1 ms 1132 KB Output is correct
4 Correct 1 ms 1132 KB Output is correct
5 Correct 1 ms 1132 KB Output is correct
6 Correct 1 ms 1132 KB Output is correct
7 Correct 16 ms 2668 KB Output is correct
8 Correct 16 ms 2668 KB Output is correct
9 Correct 18 ms 2796 KB Output is correct
10 Correct 12 ms 2028 KB Output is correct
11 Correct 15 ms 2028 KB Output is correct
12 Correct 10 ms 1488 KB Output is correct
13 Correct 17 ms 2768 KB Output is correct
14 Correct 15 ms 2768 KB Output is correct
15 Correct 15 ms 2768 KB Output is correct
16 Correct 11 ms 2156 KB Output is correct
17 Correct 12 ms 2176 KB Output is correct
18 Correct 7 ms 1484 KB Output is correct
19 Correct 833 ms 31600 KB Output is correct
20 Correct 790 ms 31508 KB Output is correct
21 Correct 822 ms 31512 KB Output is correct
22 Correct 498 ms 22640 KB Output is correct
23 Correct 465 ms 22896 KB Output is correct
24 Correct 315 ms 13780 KB Output is correct
25 Correct 694 ms 29552 KB Output is correct
26 Correct 722 ms 29708 KB Output is correct
27 Correct 629 ms 27912 KB Output is correct
28 Correct 438 ms 22640 KB Output is correct
29 Correct 475 ms 22640 KB Output is correct
30 Correct 273 ms 13776 KB Output is correct
31 Correct 838 ms 29808 KB Output is correct
32 Correct 795 ms 31856 KB Output is correct
33 Correct 855 ms 31604 KB Output is correct
34 Correct 508 ms 21744 KB Output is correct
35 Correct 485 ms 20840 KB Output is correct
36 Correct 308 ms 13780 KB Output is correct
37 Correct 829 ms 29808 KB Output is correct
38 Correct 809 ms 30832 KB Output is correct
39 Correct 755 ms 28272 KB Output is correct
40 Correct 403 ms 22640 KB Output is correct
41 Correct 475 ms 22664 KB Output is correct
42 Correct 262 ms 13776 KB Output is correct
43 Correct 1250 ms 53096 KB Output is correct
44 Correct 1121 ms 52976 KB Output is correct
45 Correct 1152 ms 55152 KB Output is correct
46 Correct 705 ms 32624 KB Output is correct
47 Correct 655 ms 33520 KB Output is correct
48 Correct 291 ms 11092 KB Output is correct
49 Correct 1111 ms 55156 KB Output is correct
50 Correct 1117 ms 52976 KB Output is correct
51 Correct 1070 ms 55092 KB Output is correct
52 Correct 612 ms 32368 KB Output is correct
53 Correct 622 ms 34032 KB Output is correct