oj.uz

Submission #299387

# Submission time Handle Problem Language Result Execution time Memory
299387 2020-09-14T20:05:55 Z mat_v Regions (IOI09_regions) C++14
45 / 100
 4879 ms 128880 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/rope>

#define ff(i,a,b) for(int (i) = (a); (i) <= (b); ++(i))
#define fb(i,a,b) for(int (i) = (a); (i) >= (b); --(i))
#define mod 998244353
#define xx first
#define yy second
#define all(a) (a).begin(), (a).end()
#define pb push_back
#define ll long long
#define pii pair<int,int>
#define maxn 200005

using namespace std;
using namespace __gnu_pbds;
typedef tree<int, null_type, less<int>,rb_tree_tag, tree_order_statistics_node_update> ordered_set;/// find_by_order(x)(x+1th) , order_of_key() (strictly less)
mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());

int dlt = 500;
int t = 0;

int n,r,q;
vector<int> graf[maxn];
int cnt[maxn];
int cale[maxn], niz[maxn];
int slika[maxn];
int rev[maxn];
int atm[maxn];
int in[maxn], out[maxn];
int dole[25010][505];
int gore[25010][505];
vector<pii> all[25005];
vector<int> ins[25005];
int br;


void dfs(int x){
    in[x] = ++t;
    atm[niz[x]]++;
    if(rev[niz[x]]){
        ff(i,1,r){
            dole[i][rev[niz[x]]] += atm[i];
        }
        dole[niz[x]][rev[niz[x]]]--;
        gore[niz[x]][rev[niz[x]]]--;
    }
    ff(i,1,br){
        gore[niz[x]][i] += atm[rev[i]];
    }
    for(auto c:graf[x]){
        if(c == cale[x])continue;
        dfs(c);
    }
    atm[niz[x]]--;
    out[x] = t;
    if(!rev[niz[x]]){
        all[niz[x]].pb({in[x], -1});
        all[niz[x]].pb({out[x], 1});
        ins[niz[x]].pb(in[x]);
    }
}

int main()
{

    ios_base::sync_with_stdio(false); cin.tie(0);
    cin >> n >> r >> q;
    ff(i,1,n){
        if(i == 1){
            cin >> niz[i];
            continue;
        }
        cin >> cale[i] >> niz[i];
        graf[i].pb(cale[i]);
        graf[cale[i]].pb(i);
        cnt[niz[i]]++;
    }
    ff(i,1,r){
        if(cnt[i] >= dlt){
            slika[i] = ++br;
            rev[br] = i;
        }
    }
    dfs(1);
    ff(i,1,r){
        sort(all[i].begin(), all[i].end());
        sort(ins[i].begin(), ins[i].end());
    }
    while(q--){
        int r1,r2;
        cin >> r1 >> r2;
        if(rev[r1]){
            cout << dole[r2][rev[r1]] << endl;
            continue;
        }
        if(rev[r2]){
            cout << gore[r1][rev[r2]] << endl;
            continue;
        }
        int ans = 0;
        for(int i=0, j=0; i<all[r1].size();i++){
            while(j<ins[r2].size() && ins[r2][j] <= all[r1][i].xx)j++;
            ans += j*all[r1][i].yy;
        }
        cout << (ans) - (r1 == r2) * (ins[r1].size()) << endl;

    }
    return 0;
}

Compilation message

regions.cpp: In function 'void dfs(int)':
regions.cpp:6:27: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    6 | #define ff(i,a,b) for(int (i) = (a); (i) <= (b); ++(i))
      |                           ^
regions.cpp:44:9: note: in expansion of macro 'ff'
   44 |         ff(i,1,r){
      |         ^~
regions.cpp:6:27: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    6 | #define ff(i,a,b) for(int (i) = (a); (i) <= (b); ++(i))
      |                           ^
regions.cpp:50:5: note: in expansion of macro 'ff'
   50 |     ff(i,1,br){
      |     ^~
regions.cpp: In function 'int main()':
regions.cpp:6:27: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    6 | #define ff(i,a,b) for(int (i) = (a); (i) <= (b); ++(i))
      |                           ^
regions.cpp:71:5: note: in expansion of macro 'ff'
   71 |     ff(i,1,n){
      |     ^~
regions.cpp:6:27: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    6 | #define ff(i,a,b) for(int (i) = (a); (i) <= (b); ++(i))
      |                           ^
regions.cpp:81:5: note: in expansion of macro 'ff'
   81 |     ff(i,1,r){
      |     ^~
regions.cpp:6:27: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    6 | #define ff(i,a,b) for(int (i) = (a); (i) <= (b); ++(i))
      |                           ^
regions.cpp:88:5: note: in expansion of macro 'ff'
   88 |     ff(i,1,r){
      |     ^~
regions.cpp:104:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  104 |         for(int i=0, j=0; i<all[r1].size();i++){
      |                           ~^~~~~~~~~~~~~~~
regions.cpp:105:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  105 |             while(j<ins[r2].size() && ins[r2][j] <= all[r1][i].xx)j++;
      |                   ~^~~~~~~~~~~~~~~

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 6272 KB Output is correct
2 Correct 5 ms 6272 KB Output is correct
3 Correct 7 ms 6272 KB Output is correct
4 Correct 9 ms 6272 KB Output is correct
5 Correct 12 ms 6272 KB Output is correct
6 Correct 15 ms 6400 KB Output is correct
7 Correct 33 ms 6400 KB Output is correct
8 Correct 38 ms 6400 KB Output is correct
9 Correct 33 ms 7032 KB Output is correct
10 Correct 74 ms 7112 KB Output is correct
11 Correct 82 ms 7500 KB Output is correct
12 Correct 133 ms 8136 KB Output is correct
13 Correct 157 ms 8444 KB Output is correct
14 Correct 204 ms 8888 KB Output is correct
15 Correct 211 ms 11392 KB Output is correct

Subtask #2
30.0 / 85.0

# Verdict Execution time Memory Grader output
1 Incorrect 2772 ms 13212 KB Output isn't correct
2 Incorrect 4654 ms 13324 KB Output isn't correct
3 Incorrect 4558 ms 15484 KB Output isn't correct
4 Correct 154 ms 8892 KB Output is correct
5 Correct 336 ms 10240 KB Output is correct
6 Incorrect 751 ms 38028 KB Output isn't correct
7 Correct 954 ms 12280 KB Output is correct
8 Incorrect 992 ms 56696 KB Output isn't correct
9 Correct 1278 ms 19904 KB Output is correct
10 Correct 2128 ms 23672 KB Output is correct
11 Correct 2397 ms 22808 KB Output is correct
12 Incorrect 2387 ms 83476 KB Output isn't correct
13 Incorrect 2914 ms 84556 KB Output isn't correct
14 Incorrect 3430 ms 100328 KB Output isn't correct
15 Incorrect 4140 ms 124144 KB Output isn't correct
16 Incorrect 4750 ms 128880 KB Output isn't correct
17 Incorrect 4879 ms 107988 KB Output isn't correct