oj.uz

Submission #643115

# Submission time Handle Problem Language Result Execution time Memory
643115 2022-09-21T08:50:18 Z mahatma_muhammad Love Polygon (BOI18_polygon) C++14
100 / 100
 229 ms 52184 KB 
#include <bits/stdc++.h>
#include <math.h>
//in the name of god,aka allah
//**gray sety orz**
using namespace std;
#define pi pair<long long , long long>
#define pii pair<long long , pair<long long , long long>>
const int maxm = 5e5;
const long long mod = 1e9 + 7 ;
typedef long long ll;
ll l,r,mid;
ll n,m;
ll dis[maxm] , sum[maxm];
bool isval(int mid){
    //cout << mid <<" " << mid*mid-mid <<endl;
    if (((mid-1)*mid)/2 < m) return 0;
    return 1;
}
ll darage[maxm] , ss , mm;
queue<int> q;
vector<pi> g[maxm] , z[maxm];
ll sath[maxm];
bool vis[maxm] , gos[maxm];
ll pedaret[maxm];
ll get_par(ll v){
    if (pedaret[v]==v) return v;
    return pedaret[v] = get_par(pedaret[v]);
}
void merge(ll r , ll q){
    if (get_par(r)!=get_par(q))l+=max(darage[r],darage[q])*1ll*sath[r]*1ll*sath[q];
    r = get_par(r) , q = get_par(q);
    if (r!=q){
        if (sath[r]<sath[q]) swap(r,q);
        pedaret[q] = r;
        sath[r] += sath[q];
    }
    return ;
}
ll pars1[maxm] , pars2[maxm];
vector<ll> se[maxm];
set<string> st;
ll rp[maxm];
pi w[maxm];
ll dp[maxm];
//ll rw[maxm][maxm];
map<string,ll> mp;
const int MM = 1e5+5;
int ind[MM],nxt[MM];
bool done[MM];
vector<int> adj[MM];
string back[MM];
 
int mx = 0;
int conv(string s){
    if(mp.find(s) ==mp.end()) mp.insert({s,mp.size()}), back[mp.size()-1] = s; // 0-index
    return mp[s];
}
int main() 
{
    cin.tie(0)->sync_with_stdio(0);
    cin >> n;
    if(n & 1) return 0*printf("-1\n"); 
    for(int i = 0; i < n; i++){
        string a,b;
        cin >> a >> b;
        int aa = conv(a), bb = conv(b);
        nxt[aa] = bb;
        ind[bb]++;
    }
    for(int i = 0; i < n; i++) if(nxt[nxt[i]] == i && nxt[i] != i) done[i] = 1, done[nxt[i]] = 1;
    queue<int> q;
    for(int i = 0; i < n; i++) if(!done[i] && ind[i] == 0) q.push(i);
    
    int ans = 0;
    while(!q.empty())
    {
        int u = q.front(); q.pop();
        //db(back[u])
        ans++; done[u] = 1;
        if(!done[nxt[u]])
        {           
            if(--ind[nxt[nxt[u]]] == 0 && !done[nxt[nxt[u]]]) q.push(nxt[nxt[u]]);
            //db(back[nxt[u]])
            done[nxt[u]] = 1;
        }
    }
    //db(done[conv("d")])
    for(int i = 0; i < n; i++)
    {
        if(!done[i])
        {
            int len = 1;
            done[i] = 1;
            for(int pos = nxt[i]; pos != i; done[pos] = 1, pos = nxt[pos]) len++;
            //db(len)
            ans += (len+1)/2;
        }
    }
 
    cout << ans << "\n";
}

Subtask #1
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 40980 KB Output is correct
2 Correct 24 ms 41044 KB Output is correct
3 Correct 20 ms 41024 KB Output is correct
4 Correct 20 ms 41056 KB Output is correct
5 Correct 20 ms 40948 KB Output is correct
6 Correct 20 ms 41064 KB Output is correct
7 Correct 21 ms 41056 KB Output is correct
8 Correct 22 ms 41044 KB Output is correct
9 Correct 20 ms 41044 KB Output is correct
10 Correct 19 ms 41020 KB Output is correct
11 Correct 21 ms 41064 KB Output is correct
12 Correct 20 ms 41044 KB Output is correct
13 Correct 23 ms 41044 KB Output is correct
14 Correct 20 ms 41060 KB Output is correct
15 Correct 20 ms 41044 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 41044 KB Output is correct
2 Correct 22 ms 41020 KB Output is correct
3 Correct 20 ms 41044 KB Output is correct
4 Correct 184 ms 49720 KB Output is correct
5 Correct 187 ms 49688 KB Output is correct
6 Correct 200 ms 49740 KB Output is correct
7 Correct 21 ms 41044 KB Output is correct

Subtask #3
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 194 ms 49852 KB Output is correct
2 Correct 189 ms 51972 KB Output is correct
3 Correct 168 ms 51780 KB Output is correct
4 Correct 26 ms 41084 KB Output is correct
5 Correct 201 ms 51800 KB Output is correct
6 Correct 184 ms 52028 KB Output is correct
7 Correct 205 ms 52064 KB Output is correct
8 Correct 184 ms 52040 KB Output is correct
9 Correct 189 ms 52184 KB Output is correct
10 Correct 152 ms 51872 KB Output is correct
11 Correct 22 ms 41044 KB Output is correct
12 Correct 22 ms 40980 KB Output is correct
13 Correct 20 ms 41036 KB Output is correct
14 Correct 21 ms 41044 KB Output is correct

Subtask #4
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 40980 KB Output is correct
2 Correct 24 ms 41044 KB Output is correct
3 Correct 20 ms 41024 KB Output is correct
4 Correct 20 ms 41056 KB Output is correct
5 Correct 20 ms 40948 KB Output is correct
6 Correct 20 ms 41064 KB Output is correct
7 Correct 21 ms 41056 KB Output is correct
8 Correct 22 ms 41044 KB Output is correct
9 Correct 20 ms 41044 KB Output is correct
10 Correct 19 ms 41020 KB Output is correct
11 Correct 21 ms 41064 KB Output is correct
12 Correct 20 ms 41044 KB Output is correct
13 Correct 23 ms 41044 KB Output is correct
14 Correct 20 ms 41060 KB Output is correct
15 Correct 20 ms 41044 KB Output is correct
16 Correct 20 ms 41044 KB Output is correct
17 Correct 22 ms 41020 KB Output is correct
18 Correct 20 ms 41044 KB Output is correct
19 Correct 184 ms 49720 KB Output is correct
20 Correct 187 ms 49688 KB Output is correct
21 Correct 200 ms 49740 KB Output is correct
22 Correct 21 ms 41044 KB Output is correct
23 Correct 194 ms 49852 KB Output is correct
24 Correct 189 ms 51972 KB Output is correct
25 Correct 168 ms 51780 KB Output is correct
26 Correct 26 ms 41084 KB Output is correct
27 Correct 201 ms 51800 KB Output is correct
28 Correct 184 ms 52028 KB Output is correct
29 Correct 205 ms 52064 KB Output is correct
30 Correct 184 ms 52040 KB Output is correct
31 Correct 189 ms 52184 KB Output is correct
32 Correct 152 ms 51872 KB Output is correct
33 Correct 22 ms 41044 KB Output is correct
34 Correct 22 ms 40980 KB Output is correct
35 Correct 20 ms 41036 KB Output is correct
36 Correct 21 ms 41044 KB Output is correct
37 Correct 198 ms 51948 KB Output is correct
38 Correct 185 ms 52092 KB Output is correct
39 Correct 211 ms 52084 KB Output is correct
40 Correct 185 ms 52048 KB Output is correct
41 Correct 182 ms 52048 KB Output is correct
42 Correct 212 ms 51984 KB Output is correct
43 Correct 194 ms 52024 KB Output is correct
44 Correct 200 ms 51972 KB Output is correct
45 Correct 195 ms 52020 KB Output is correct
46 Correct 219 ms 52040 KB Output is correct
47 Correct 213 ms 52132 KB Output is correct
48 Correct 201 ms 52008 KB Output is correct
49 Correct 192 ms 51876 KB Output is correct
50 Correct 178 ms 51788 KB Output is correct
51 Correct 21 ms 41044 KB Output is correct
52 Correct 216 ms 52048 KB Output is correct
53 Correct 190 ms 52008 KB Output is correct
54 Correct 212 ms 52060 KB Output is correct
55 Correct 194 ms 51952 KB Output is correct
56 Correct 173 ms 52140 KB Output is correct
57 Correct 146 ms 51836 KB Output is correct
58 Correct 21 ms 41060 KB Output is correct
59 Correct 21 ms 40996 KB Output is correct
60 Correct 21 ms 41044 KB Output is correct
61 Correct 22 ms 41044 KB Output is correct
62 Correct 25 ms 41080 KB Output is correct
63 Correct 22 ms 41044 KB Output is correct
64 Correct 21 ms 40980 KB Output is correct
65 Correct 180 ms 51796 KB Output is correct
66 Correct 186 ms 51796 KB Output is correct
67 Correct 229 ms 51848 KB Output is correct
68 Correct 21 ms 41044 KB Output is correct
69 Correct 21 ms 41044 KB Output is correct
70 Correct 23 ms 41028 KB Output is correct
71 Correct 20 ms 41044 KB Output is correct
72 Correct 20 ms 41044 KB Output is correct
73 Correct 20 ms 41020 KB Output is correct
74 Correct 21 ms 41072 KB Output is correct
75 Correct 20 ms 41044 KB Output is correct
76 Correct 20 ms 41044 KB Output is correct
77 Correct 20 ms 41044 KB Output is correct
78 Correct 25 ms 41044 KB Output is correct
79 Correct 24 ms 41064 KB Output is correct
80 Correct 24 ms 41028 KB Output is correct
81 Correct 20 ms 41032 KB Output is correct
82 Correct 21 ms 41064 KB Output is correct
83 Correct 20 ms 41044 KB Output is correct