oj.uz

Submission #436490

# Submission time Handle Problem Language Result Execution time Memory
436490 2021-06-24T14:21:51 Z mat_v Simurgh (IOI17_simurgh) C++14
51 / 100
 308 ms 5236 KB 
#include "simurgh.h"
#include <bits/stdc++.h>
#define ff(i,a,b) for(int (i) = (a); (i) <= (b); ++(i))
#define pb push_back
#define pii pair<int,int>
#define xx first
#define yy second

using namespace std;

pii ed[500005];
int _n;

int disc[505];
bool bio[505];
vector<pii> graf[505];
pii cale[505];
vector<pii> gore[505];
int br=1;
int odg[500005];
int out[505];

void dfs(int x){
    disc[x] = br;
    bio[x] = 1;
    for(auto c:graf[x]){
        if(bio[c.xx])continue;
        cale[c.xx] = {x,c.yy};
        br++;
        dfs(c.xx);
    }
    br++;
    out[x] = br;
}

set<int> s;
int poc;

int dsu[505];
int finddsu(int x){
    if(x == dsu[x])return x;
    return dsu[x] = finddsu(dsu[x]);
}


int pitaj(){
    vector<int> r;
    for(auto c:s)r.pb(c);
    ff(i,0,_n-1)dsu[i] = i;
    for(auto c:r){
        if(finddsu(ed[c].xx) == finddsu(ed[c].yy))assert(false);
        dsu[finddsu(ed[c].xx)] = finddsu(ed[c].yy);
    }
    return count_common_roads(r);
}

vector<pii> sad;
vector<int> ans;
vector<int> imam;

void resi(int x){
    for(auto c:graf[x]){
        if(cale[c.xx].xx == x)resi(c.xx);
    }
    if(x == 0)return;
    int i = x;
    sad.clear();
    int mks = poc;
    sad.pb({poc,cale[i].yy});
    bool da = 0;

    for(auto c:gore[i]){
        s.erase(cale[i].yy);
        s.insert(c.yy);
        int sta = pitaj();
        if(sta != poc)da = 1;
        mks = max(mks, sta);
        sad.pb({sta, c.yy});
        s.erase(c.yy);
        s.insert(cale[i].yy);
    }
    if(da){
        for(auto c:sad){
            if(c.xx == mks){
                ans.pb(c.yy);
                odg[c.yy] = 1;
            }
        }
    }
    else{
        bool ima = 0;
        for(auto c:imam){
            int mn = min(disc[ed[c].xx], disc[ed[c].yy]);
            int ms = max(disc[ed[c].xx], disc[ed[c].yy]);
            if(mn < disc[x] &&  ms > disc[x] && ms < out[x]){
                ima = 1;
                s.erase(cale[i].yy);
                s.insert(c);
                int kurac = pitaj();
                if(kurac == poc){
                    odg[cale[i].yy] = odg[c];
                }
                else if(kurac < poc)odg[cale[i].yy] = 1;
                s.erase(c);
                s.insert(cale[i].yy);
                break;
            }
        }
        if(!ima)odg[cale[i].yy] = 1;
        if(odg[cale[i].yy] == 1){
            for(auto c:sad){
                odg[c.yy] = 1;
                ans.pb(c.yy);
            }
        }
    }
    for(auto c:gore[i])imam.pb(c.yy);

}

std::vector<int> find_roads(int n, std::vector<int> u, std::vector<int> v) {
	std::vector<int> r(n - 1);
    int m = u.size();
    _n = n;
    ff(i,0,m - 1){
        ed[i] = {u[i],v[i]};
        graf[u[i]].pb({v[i],i});
        graf[v[i]].pb({u[i],i});
    }
    ff(i,0,n - 1)cale[i].xx = -1;
    dfs(0);
    ff(i,0,m - 1){
        int prvi = u[i];
        int drugi = v[i];
        if(cale[prvi].xx == drugi || cale[drugi].xx == prvi)continue;
        if(disc[prvi] < disc[drugi]){
            gore[drugi].pb({prvi,i});
        }
        else gore[prvi].pb({drugi,i});
    }
    ff(i,0,m - 1){
        if(cale[u[i]].xx == v[i] || cale[v[i]].xx == u[i])s.insert(i);
    }
    //cout << "kurcina\n";
    poc = pitaj();
    resi(0);
    int pp = ans.size();
    //assert(pp == n-1);
    return ans;

}
/*
4 6
0 1
0 2
0 3
1 2
1 3
2 3
0 1 5
*/

Compilation message

simurgh.cpp: In function 'int pitaj()':
simurgh.cpp:3:27: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    3 | #define ff(i,a,b) for(int (i) = (a); (i) <= (b); ++(i))
      |                           ^
simurgh.cpp:49:5: note: in expansion of macro 'ff'
   49 |     ff(i,0,_n-1)dsu[i] = i;
      |     ^~
simurgh.cpp: In function 'std::vector<int> find_roads(int, std::vector<int>, std::vector<int>)':
simurgh.cpp:3:27: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    3 | #define ff(i,a,b) for(int (i) = (a); (i) <= (b); ++(i))
      |                           ^
simurgh.cpp:125:5: note: in expansion of macro 'ff'
  125 |     ff(i,0,m - 1){
      |     ^~
simurgh.cpp:3:27: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    3 | #define ff(i,a,b) for(int (i) = (a); (i) <= (b); ++(i))
      |                           ^
simurgh.cpp:130:5: note: in expansion of macro 'ff'
  130 |     ff(i,0,n - 1)cale[i].xx = -1;
      |     ^~
simurgh.cpp:3:27: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    3 | #define ff(i,a,b) for(int (i) = (a); (i) <= (b); ++(i))
      |                           ^
simurgh.cpp:132:5: note: in expansion of macro 'ff'
  132 |     ff(i,0,m - 1){
      |     ^~
simurgh.cpp:3:27: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    3 | #define ff(i,a,b) for(int (i) = (a); (i) <= (b); ++(i))
      |                           ^
simurgh.cpp:141:5: note: in expansion of macro 'ff'
  141 |     ff(i,0,m - 1){
      |     ^~
simurgh.cpp:147:9: warning: unused variable 'pp' [-Wunused-variable]
  147 |     int pp = ans.size();
      |         ^~

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB correct
2 Correct 1 ms 332 KB correct
3 Correct 1 ms 332 KB correct
4 Correct 1 ms 332 KB correct
5 Correct 1 ms 332 KB correct
6 Correct 1 ms 332 KB correct
7 Correct 0 ms 332 KB correct
8 Correct 1 ms 332 KB correct
9 Correct 1 ms 332 KB correct
10 Correct 1 ms 332 KB correct
11 Correct 1 ms 332 KB correct
12 Correct 1 ms 332 KB correct
13 Correct 1 ms 332 KB correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB correct
2 Correct 1 ms 332 KB correct
3 Correct 1 ms 332 KB correct
4 Correct 1 ms 332 KB correct
5 Correct 1 ms 332 KB correct
6 Correct 1 ms 332 KB correct
7 Correct 0 ms 332 KB correct
8 Correct 1 ms 332 KB correct
9 Correct 1 ms 332 KB correct
10 Correct 1 ms 332 KB correct
11 Correct 1 ms 332 KB correct
12 Correct 1 ms 332 KB correct
13 Correct 1 ms 332 KB correct
14 Correct 4 ms 424 KB correct
15 Correct 4 ms 332 KB correct
16 Correct 5 ms 424 KB correct
17 Correct 4 ms 432 KB correct
18 Correct 2 ms 332 KB correct
19 Correct 4 ms 332 KB correct
20 Correct 3 ms 332 KB correct
21 Correct 3 ms 332 KB correct
22 Correct 3 ms 332 KB correct
23 Correct 2 ms 332 KB correct
24 Correct 2 ms 332 KB correct
25 Correct 1 ms 332 KB correct
26 Correct 2 ms 332 KB correct
27 Correct 2 ms 332 KB correct
28 Correct 2 ms 372 KB correct
29 Correct 1 ms 332 KB correct
30 Correct 2 ms 332 KB correct
31 Correct 2 ms 332 KB correct
32 Correct 2 ms 332 KB correct
33 Correct 3 ms 292 KB correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB correct
2 Correct 1 ms 332 KB correct
3 Correct 1 ms 332 KB correct
4 Correct 1 ms 332 KB correct
5 Correct 1 ms 332 KB correct
6 Correct 1 ms 332 KB correct
7 Correct 0 ms 332 KB correct
8 Correct 1 ms 332 KB correct
9 Correct 1 ms 332 KB correct
10 Correct 1 ms 332 KB correct
11 Correct 1 ms 332 KB correct
12 Correct 1 ms 332 KB correct
13 Correct 1 ms 332 KB correct
14 Correct 4 ms 424 KB correct
15 Correct 4 ms 332 KB correct
16 Correct 5 ms 424 KB correct
17 Correct 4 ms 432 KB correct
18 Correct 2 ms 332 KB correct
19 Correct 4 ms 332 KB correct
20 Correct 3 ms 332 KB correct
21 Correct 3 ms 332 KB correct
22 Correct 3 ms 332 KB correct
23 Correct 2 ms 332 KB correct
24 Correct 2 ms 332 KB correct
25 Correct 1 ms 332 KB correct
26 Correct 2 ms 332 KB correct
27 Correct 2 ms 332 KB correct
28 Correct 2 ms 372 KB correct
29 Correct 1 ms 332 KB correct
30 Correct 2 ms 332 KB correct
31 Correct 2 ms 332 KB correct
32 Correct 2 ms 332 KB correct
33 Correct 3 ms 292 KB correct
34 Correct 294 ms 2440 KB correct
35 Correct 291 ms 2348 KB correct
36 Correct 197 ms 1988 KB correct
37 Correct 12 ms 460 KB correct
38 Correct 297 ms 2544 KB correct
39 Correct 250 ms 2244 KB correct
40 Correct 195 ms 1932 KB correct
41 Correct 304 ms 2536 KB correct
42 Correct 308 ms 2436 KB correct
43 Correct 168 ms 1480 KB correct
44 Correct 136 ms 1352 KB correct
45 Correct 154 ms 1252 KB correct
46 Correct 113 ms 1124 KB correct
47 Correct 51 ms 716 KB correct
48 Correct 4 ms 332 KB correct
49 Correct 14 ms 476 KB correct
50 Correct 52 ms 736 KB correct
51 Correct 153 ms 1444 KB correct
52 Correct 130 ms 1140 KB correct
53 Correct 130 ms 1092 KB correct
54 Correct 163 ms 1576 KB correct
55 Correct 145 ms 1348 KB correct
56 Correct 142 ms 1280 KB correct
57 Correct 144 ms 1352 KB correct

Subtask #4
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB correct
2 Correct 1 ms 332 KB correct
3 Incorrect 241 ms 5236 KB WA in grader: NO
4 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB correct
2 Correct 1 ms 332 KB correct
3 Correct 1 ms 332 KB correct
4 Correct 1 ms 332 KB correct
5 Correct 1 ms 332 KB correct
6 Correct 1 ms 332 KB correct
7 Correct 0 ms 332 KB correct
8 Correct 1 ms 332 KB correct
9 Correct 1 ms 332 KB correct
10 Correct 1 ms 332 KB correct
11 Correct 1 ms 332 KB correct
12 Correct 1 ms 332 KB correct
13 Correct 1 ms 332 KB correct
14 Correct 4 ms 424 KB correct
15 Correct 4 ms 332 KB correct
16 Correct 5 ms 424 KB correct
17 Correct 4 ms 432 KB correct
18 Correct 2 ms 332 KB correct
19 Correct 4 ms 332 KB correct
20 Correct 3 ms 332 KB correct
21 Correct 3 ms 332 KB correct
22 Correct 3 ms 332 KB correct
23 Correct 2 ms 332 KB correct
24 Correct 2 ms 332 KB correct
25 Correct 1 ms 332 KB correct
26 Correct 2 ms 332 KB correct
27 Correct 2 ms 332 KB correct
28 Correct 2 ms 372 KB correct
29 Correct 1 ms 332 KB correct
30 Correct 2 ms 332 KB correct
31 Correct 2 ms 332 KB correct
32 Correct 2 ms 332 KB correct
33 Correct 3 ms 292 KB correct
34 Correct 294 ms 2440 KB correct
35 Correct 291 ms 2348 KB correct
36 Correct 197 ms 1988 KB correct
37 Correct 12 ms 460 KB correct
38 Correct 297 ms 2544 KB correct
39 Correct 250 ms 2244 KB correct
40 Correct 195 ms 1932 KB correct
41 Correct 304 ms 2536 KB correct
42 Correct 308 ms 2436 KB correct
43 Correct 168 ms 1480 KB correct
44 Correct 136 ms 1352 KB correct
45 Correct 154 ms 1252 KB correct
46 Correct 113 ms 1124 KB correct
47 Correct 51 ms 716 KB correct
48 Correct 4 ms 332 KB correct
49 Correct 14 ms 476 KB correct
50 Correct 52 ms 736 KB correct
51 Correct 153 ms 1444 KB correct
52 Correct 130 ms 1140 KB correct
53 Correct 130 ms 1092 KB correct
54 Correct 163 ms 1576 KB correct
55 Correct 145 ms 1348 KB correct
56 Correct 142 ms 1280 KB correct
57 Correct 144 ms 1352 KB correct
58 Correct 1 ms 332 KB correct
59 Correct 1 ms 332 KB correct
60 Incorrect 241 ms 5236 KB WA in grader: NO
61 Halted 0 ms 0 KB -