# |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
283922 |
2020-08-26T09:40:39 Z |
erd1 |
Simurgh (IOI17_simurgh) |
C++14 |
|
293 ms |
7080 KB |
#include "simurgh.h"
#include<bits/stdc++.h>
using namespace std;
#define pb push_back
#define ff first
#define ss second
#define all(x) (x).begin(), (x).end()
typedef pair<int, int> pii;
typedef long long lld;
typedef long double ld;
template<typename Iter>
ostream& outIt(ostream& out, Iter b, Iter e){
for(Iter i = b; i != e; ++i)
out << (i == b?"":" ") << *i;
return out;
}
template<typename T1, typename T2>
ostream& operator<<(ostream& out, pair<T1, T2> p){
return out << '(' << p.ff << ", " << p.ss << ')';
}
template<typename T>
ostream& operator<<(ostream& out, vector<T> v){
return outIt(out << '[', all(v)) << ']';
}
vector<vector<pii>> G;
vector<bool> asked, ans;
vector<int> te, es, dep, par, pe;
vector<pii> Edges;
//int c = 0;
int dfs(int i, int d = 1){
//cout << i << " " << d << " " << par[i] << endl;
//if(c++>100)exit(-1);
dep[i] = d;
int minup = d;
for(auto x : G[i]){
if(x.ss == pe[i])continue;
if(dep[x.ff]){
//cout << "counter" << x << endl;
minup = min(minup, dep[x.ff]);
continue;
}
es.pb(x.ss);
te[x.ss] = es.size();
pe[x.ff] = x.ss; par[x.ff] = i;
minup = min(minup, dfs(x.ff, d + 1));
}
if(!i)return 0;
//cout << i << minup << endl;
if(minup == d){
ans[pe[i]] = true;
asked[pe[i]] = true;
}
return minup;
}
int asking(int tree, int nontree){
//cout << "ask " << tree << " " << nontree << endl;
swap(es[te[tree]-1], nontree);
int ansx = count_common_roads(es);
swap(es[te[tree]-1], nontree);
//cout << ansx << endl;
return ansx;
}
vector<int> dsu;
int root(int i){ return i == dsu[i] ? i : (dsu[i] = root(dsu[i])); }
inline bool join(int i, int j){ i = root(i), j = root(j); if(i == j)return false; dsu[i] = j; return true; }
int ask2(vector<int>& v){
//cout << v << es << endl;
iota(all(dsu), 0);
int mm = v.size(), cnt = 0;
for(auto i: v)assert(join(Edges[i].ff, Edges[i].ss));
//cout << "gh" << endl;
for(auto i: es)
if(join(Edges[i].ff, Edges[i].ss))
cnt += ans[i], v.pb(i);
int ret = count_common_roads(v);
v.resize(mm);
return ret - cnt;
}
void process(int k){
vector<int> gt, a;
for(auto x: G[k])
if(!asked[x.ss])gt.pb(x.ss);
if(gt.size() == 0)return;
int deg = ask2(gt);
//cout << "process" << k << endl;
//for(auto i: gt)cout << Edges[i]; cout << endl;
//cout << deg << endl;
for(int i = 0; i < deg; i++){
int l = 0, r = gt.size();
while(r-l > 1){
a.resize(0);
for(int j = 0; j < (l+r>>1); j++)a.pb(gt[j]);
(ask2(a) <= i?l:r) = l+r>>1;
}
ans[gt[l]] = true;
}
for(auto i: gt)asked[i] = true;
//cout << asked << endl << ans << endl << endl;
}
vector<int> find_roads(int n, vector<int> u, vector<int> v) {
int m = u.size();
te.resize(m); asked.resize(m); ans.resize(m); pe.resize(n); par.resize(n); dep.resize(n); pe[0] = -1; dsu.resize(n);
G.resize(n);
for(int i = 0; i < m; i++)Edges.pb({u[i], v[i]});
for(int i = 0; i < m; i++)G[u[i]].pb({v[i], i}), G[v[i]].pb({u[i], i});
dfs(0);
int tans = count_common_roads(es);
//cout << tans << endl;
//cout << asked << endl;
//cout << te << es << dep << par << endl;
for(int i = 0; i < m; i++) if(dep[u[i]] < dep[v[i]])swap(u[i], v[i]);
for(int i = 0; i < m; i++)
if(!te[i]){
//cout << i << endl;
int tt = -1, go = false;
for(int c = u[i]; c != v[i]; c = par[c]){
if(asked[pe[c]])tt = pe[c];
else go = true;
}
if(!go)continue;
if(tt != -1){
{
int cans = asking(tt, i);
if(cans == tans)ans[i] = ans[tt];
else if(cans < tans)ans[i] = false, assert(ans[tt] == true);
else if(cans > tans)ans[i] = true, assert(ans[tt] == false);
asked[i] = true;
}
for(int c = u[i]; c != v[i]; c = par[c])
if(!asked[pe[c]]){
int cans = asking(pe[c], i);
if(cans == tans)ans[pe[c]] = ans[i];
else if(cans < tans)ans[pe[c]] = true;
else if(cans > tans)ans[i] = true;
asked[pe[c]] = true;
}
}else{
for(int c = u[i]; c != v[i]; c = par[c])
if(!asked[pe[c]]){
int cans = asking(pe[c], i);
if(cans < tans)ans[pe[c]] = true;
else if(cans > tans)ans[i] = true;
if(cans != tans)asked[pe[c]] = asked[i] = true;
}
asked[i] = true;
for(int c = u[i]; c != v[i]; c = par[c])
if(!asked[pe[c]]) ans[pe[c]] = ans[i], asked[pe[c]] = true;
}
}
//cout << asked << endl << ans << endl;
for(int i = 0; i < n; i++)process(i);
//cout << asked << endl << ans << endl;
vector<int> ret;
for(int i = 0; i < m; i++){
assert(asked[i]);
if(ans[i])ret.pb(i);
}
//assert(ret.size() == n-1);
return ret;
}
Compilation message
simurgh.cpp: In function 'void process(int)':
simurgh.cpp:100:25: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
100 | for(int j = 0; j < (l+r>>1); j++)a.pb(gt[j]);
| ~^~
simurgh.cpp:101:26: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
101 | (ask2(a) <= i?l:r) = l+r>>1;
| ~^~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
256 KB |
correct |
2 |
Correct |
1 ms |
256 KB |
correct |
3 |
Correct |
1 ms |
256 KB |
correct |
4 |
Correct |
1 ms |
256 KB |
correct |
5 |
Correct |
1 ms |
384 KB |
correct |
6 |
Correct |
0 ms |
256 KB |
correct |
7 |
Correct |
1 ms |
384 KB |
correct |
8 |
Correct |
0 ms |
256 KB |
correct |
9 |
Correct |
1 ms |
256 KB |
correct |
10 |
Correct |
1 ms |
256 KB |
correct |
11 |
Correct |
0 ms |
256 KB |
correct |
12 |
Correct |
1 ms |
256 KB |
correct |
13 |
Correct |
1 ms |
256 KB |
correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
256 KB |
correct |
2 |
Correct |
1 ms |
256 KB |
correct |
3 |
Correct |
1 ms |
256 KB |
correct |
4 |
Correct |
1 ms |
256 KB |
correct |
5 |
Correct |
1 ms |
384 KB |
correct |
6 |
Correct |
0 ms |
256 KB |
correct |
7 |
Correct |
1 ms |
384 KB |
correct |
8 |
Correct |
0 ms |
256 KB |
correct |
9 |
Correct |
1 ms |
256 KB |
correct |
10 |
Correct |
1 ms |
256 KB |
correct |
11 |
Correct |
0 ms |
256 KB |
correct |
12 |
Correct |
1 ms |
256 KB |
correct |
13 |
Correct |
1 ms |
256 KB |
correct |
14 |
Correct |
2 ms |
384 KB |
correct |
15 |
Correct |
2 ms |
384 KB |
correct |
16 |
Correct |
2 ms |
384 KB |
correct |
17 |
Correct |
2 ms |
384 KB |
correct |
18 |
Correct |
1 ms |
384 KB |
correct |
19 |
Correct |
2 ms |
384 KB |
correct |
20 |
Correct |
2 ms |
384 KB |
correct |
21 |
Correct |
3 ms |
384 KB |
correct |
22 |
Correct |
2 ms |
384 KB |
correct |
23 |
Correct |
1 ms |
384 KB |
correct |
24 |
Correct |
1 ms |
384 KB |
correct |
25 |
Correct |
1 ms |
384 KB |
correct |
26 |
Correct |
1 ms |
384 KB |
correct |
27 |
Correct |
1 ms |
384 KB |
correct |
28 |
Correct |
1 ms |
384 KB |
correct |
29 |
Correct |
1 ms |
384 KB |
correct |
30 |
Correct |
1 ms |
384 KB |
correct |
31 |
Correct |
1 ms |
384 KB |
correct |
32 |
Correct |
1 ms |
384 KB |
correct |
33 |
Correct |
1 ms |
384 KB |
correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
256 KB |
correct |
2 |
Correct |
1 ms |
256 KB |
correct |
3 |
Correct |
1 ms |
256 KB |
correct |
4 |
Correct |
1 ms |
256 KB |
correct |
5 |
Correct |
1 ms |
384 KB |
correct |
6 |
Correct |
0 ms |
256 KB |
correct |
7 |
Correct |
1 ms |
384 KB |
correct |
8 |
Correct |
0 ms |
256 KB |
correct |
9 |
Correct |
1 ms |
256 KB |
correct |
10 |
Correct |
1 ms |
256 KB |
correct |
11 |
Correct |
0 ms |
256 KB |
correct |
12 |
Correct |
1 ms |
256 KB |
correct |
13 |
Correct |
1 ms |
256 KB |
correct |
14 |
Correct |
2 ms |
384 KB |
correct |
15 |
Correct |
2 ms |
384 KB |
correct |
16 |
Correct |
2 ms |
384 KB |
correct |
17 |
Correct |
2 ms |
384 KB |
correct |
18 |
Correct |
1 ms |
384 KB |
correct |
19 |
Correct |
2 ms |
384 KB |
correct |
20 |
Correct |
2 ms |
384 KB |
correct |
21 |
Correct |
3 ms |
384 KB |
correct |
22 |
Correct |
2 ms |
384 KB |
correct |
23 |
Correct |
1 ms |
384 KB |
correct |
24 |
Correct |
1 ms |
384 KB |
correct |
25 |
Correct |
1 ms |
384 KB |
correct |
26 |
Correct |
1 ms |
384 KB |
correct |
27 |
Correct |
1 ms |
384 KB |
correct |
28 |
Correct |
1 ms |
384 KB |
correct |
29 |
Correct |
1 ms |
384 KB |
correct |
30 |
Correct |
1 ms |
384 KB |
correct |
31 |
Correct |
1 ms |
384 KB |
correct |
32 |
Correct |
1 ms |
384 KB |
correct |
33 |
Correct |
1 ms |
384 KB |
correct |
34 |
Correct |
52 ms |
1920 KB |
correct |
35 |
Correct |
53 ms |
1792 KB |
correct |
36 |
Correct |
40 ms |
1536 KB |
correct |
37 |
Correct |
9 ms |
384 KB |
correct |
38 |
Correct |
51 ms |
1920 KB |
correct |
39 |
Correct |
45 ms |
1664 KB |
correct |
40 |
Correct |
47 ms |
1536 KB |
correct |
41 |
Correct |
47 ms |
1920 KB |
correct |
42 |
Correct |
56 ms |
1920 KB |
correct |
43 |
Correct |
21 ms |
1280 KB |
correct |
44 |
Correct |
16 ms |
1024 KB |
correct |
45 |
Correct |
17 ms |
1148 KB |
correct |
46 |
Correct |
15 ms |
1000 KB |
correct |
47 |
Correct |
9 ms |
640 KB |
correct |
48 |
Correct |
3 ms |
416 KB |
correct |
49 |
Correct |
7 ms |
384 KB |
correct |
50 |
Correct |
9 ms |
640 KB |
correct |
51 |
Correct |
24 ms |
1148 KB |
correct |
52 |
Correct |
15 ms |
1024 KB |
correct |
53 |
Correct |
14 ms |
896 KB |
correct |
54 |
Correct |
23 ms |
1280 KB |
correct |
55 |
Correct |
18 ms |
1152 KB |
correct |
56 |
Correct |
18 ms |
1152 KB |
correct |
57 |
Correct |
23 ms |
1128 KB |
correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
256 KB |
correct |
2 |
Correct |
1 ms |
384 KB |
correct |
3 |
Correct |
154 ms |
4844 KB |
correct |
4 |
Correct |
271 ms |
7020 KB |
correct |
5 |
Correct |
287 ms |
7020 KB |
correct |
6 |
Correct |
260 ms |
7080 KB |
correct |
7 |
Correct |
280 ms |
6996 KB |
correct |
8 |
Correct |
253 ms |
7044 KB |
correct |
9 |
Correct |
273 ms |
7020 KB |
correct |
10 |
Correct |
287 ms |
7020 KB |
correct |
11 |
Correct |
287 ms |
7060 KB |
correct |
12 |
Correct |
292 ms |
7064 KB |
correct |
13 |
Correct |
1 ms |
256 KB |
correct |
14 |
Correct |
277 ms |
6996 KB |
correct |
15 |
Correct |
286 ms |
7052 KB |
correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
256 KB |
correct |
2 |
Correct |
1 ms |
256 KB |
correct |
3 |
Correct |
1 ms |
256 KB |
correct |
4 |
Correct |
1 ms |
256 KB |
correct |
5 |
Correct |
1 ms |
384 KB |
correct |
6 |
Correct |
0 ms |
256 KB |
correct |
7 |
Correct |
1 ms |
384 KB |
correct |
8 |
Correct |
0 ms |
256 KB |
correct |
9 |
Correct |
1 ms |
256 KB |
correct |
10 |
Correct |
1 ms |
256 KB |
correct |
11 |
Correct |
0 ms |
256 KB |
correct |
12 |
Correct |
1 ms |
256 KB |
correct |
13 |
Correct |
1 ms |
256 KB |
correct |
14 |
Correct |
2 ms |
384 KB |
correct |
15 |
Correct |
2 ms |
384 KB |
correct |
16 |
Correct |
2 ms |
384 KB |
correct |
17 |
Correct |
2 ms |
384 KB |
correct |
18 |
Correct |
1 ms |
384 KB |
correct |
19 |
Correct |
2 ms |
384 KB |
correct |
20 |
Correct |
2 ms |
384 KB |
correct |
21 |
Correct |
3 ms |
384 KB |
correct |
22 |
Correct |
2 ms |
384 KB |
correct |
23 |
Correct |
1 ms |
384 KB |
correct |
24 |
Correct |
1 ms |
384 KB |
correct |
25 |
Correct |
1 ms |
384 KB |
correct |
26 |
Correct |
1 ms |
384 KB |
correct |
27 |
Correct |
1 ms |
384 KB |
correct |
28 |
Correct |
1 ms |
384 KB |
correct |
29 |
Correct |
1 ms |
384 KB |
correct |
30 |
Correct |
1 ms |
384 KB |
correct |
31 |
Correct |
1 ms |
384 KB |
correct |
32 |
Correct |
1 ms |
384 KB |
correct |
33 |
Correct |
1 ms |
384 KB |
correct |
34 |
Correct |
52 ms |
1920 KB |
correct |
35 |
Correct |
53 ms |
1792 KB |
correct |
36 |
Correct |
40 ms |
1536 KB |
correct |
37 |
Correct |
9 ms |
384 KB |
correct |
38 |
Correct |
51 ms |
1920 KB |
correct |
39 |
Correct |
45 ms |
1664 KB |
correct |
40 |
Correct |
47 ms |
1536 KB |
correct |
41 |
Correct |
47 ms |
1920 KB |
correct |
42 |
Correct |
56 ms |
1920 KB |
correct |
43 |
Correct |
21 ms |
1280 KB |
correct |
44 |
Correct |
16 ms |
1024 KB |
correct |
45 |
Correct |
17 ms |
1148 KB |
correct |
46 |
Correct |
15 ms |
1000 KB |
correct |
47 |
Correct |
9 ms |
640 KB |
correct |
48 |
Correct |
3 ms |
416 KB |
correct |
49 |
Correct |
7 ms |
384 KB |
correct |
50 |
Correct |
9 ms |
640 KB |
correct |
51 |
Correct |
24 ms |
1148 KB |
correct |
52 |
Correct |
15 ms |
1024 KB |
correct |
53 |
Correct |
14 ms |
896 KB |
correct |
54 |
Correct |
23 ms |
1280 KB |
correct |
55 |
Correct |
18 ms |
1152 KB |
correct |
56 |
Correct |
18 ms |
1152 KB |
correct |
57 |
Correct |
23 ms |
1128 KB |
correct |
58 |
Correct |
1 ms |
256 KB |
correct |
59 |
Correct |
1 ms |
384 KB |
correct |
60 |
Correct |
154 ms |
4844 KB |
correct |
61 |
Correct |
271 ms |
7020 KB |
correct |
62 |
Correct |
287 ms |
7020 KB |
correct |
63 |
Correct |
260 ms |
7080 KB |
correct |
64 |
Correct |
280 ms |
6996 KB |
correct |
65 |
Correct |
253 ms |
7044 KB |
correct |
66 |
Correct |
273 ms |
7020 KB |
correct |
67 |
Correct |
287 ms |
7020 KB |
correct |
68 |
Correct |
287 ms |
7060 KB |
correct |
69 |
Correct |
292 ms |
7064 KB |
correct |
70 |
Correct |
1 ms |
256 KB |
correct |
71 |
Correct |
277 ms |
6996 KB |
correct |
72 |
Correct |
286 ms |
7052 KB |
correct |
73 |
Correct |
0 ms |
256 KB |
correct |
74 |
Correct |
285 ms |
7044 KB |
correct |
75 |
Correct |
277 ms |
6872 KB |
correct |
76 |
Correct |
122 ms |
2904 KB |
correct |
77 |
Correct |
267 ms |
7036 KB |
correct |
78 |
Correct |
287 ms |
7052 KB |
correct |
79 |
Correct |
293 ms |
7040 KB |
correct |
80 |
Correct |
282 ms |
7020 KB |
correct |
81 |
Correct |
239 ms |
6252 KB |
correct |
82 |
Correct |
270 ms |
6892 KB |
correct |
83 |
Correct |
206 ms |
3960 KB |
correct |
84 |
Correct |
97 ms |
4724 KB |
correct |
85 |
Correct |
94 ms |
4472 KB |
correct |
86 |
Correct |
70 ms |
2936 KB |
correct |
87 |
Correct |
57 ms |
2432 KB |
correct |
88 |
Correct |
49 ms |
1792 KB |
correct |
89 |
Correct |
54 ms |
1792 KB |
correct |
90 |
Correct |
43 ms |
1536 KB |
correct |
91 |
Correct |
19 ms |
512 KB |
correct |
92 |
Correct |
10 ms |
384 KB |
correct |
93 |
Correct |
85 ms |
4468 KB |
correct |
94 |
Correct |
64 ms |
2936 KB |
correct |
95 |
Correct |
62 ms |
2936 KB |
correct |
96 |
Correct |
40 ms |
1664 KB |
correct |
97 |
Correct |
48 ms |
1792 KB |
correct |
98 |
Correct |
47 ms |
2520 KB |
correct |
99 |
Correct |
48 ms |
1792 KB |
correct |
100 |
Correct |
22 ms |
768 KB |
correct |
101 |
Correct |
12 ms |
384 KB |
correct |
102 |
Correct |
118 ms |
3696 KB |
correct |
103 |
Correct |
117 ms |
3824 KB |
correct |
104 |
Correct |
96 ms |
3704 KB |
correct |
105 |
Correct |
113 ms |
3696 KB |
correct |