oj.uz

Submission #720352

# Submission time Handle Problem Language Result Execution time Memory
720352 2023-04-08T04:36:45 Z n0sk1ll Joker (BOI20_joker) C++14
100 / 100
 327 ms 16024 KB 
#include <bits/stdc++.h>

#define FAST ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);cerr.tie(0)
#define mp make_pair
#define xx first
#define yy second
#define pb push_back
#define pf push_front
#define popb pop_back
#define popf pop_front
#define all(x) x.begin(),x.end()
#define ff(i,a,b) for (int i = a; i < b; i++)
#define fff(i,a,b) for (int i = a; i <= b; i++)
#define bff(i,a,b) for (int i = b-1; i >= a; i--)
#define bfff(i,a,b) for (int i = b; i >= a; i--)

using namespace std;
long double typedef ld;
unsigned int typedef ui;
long long int typedef li;
pair<int,int> typedef pii;
pair<li,li> typedef pli;
pair<ld,ld> typedef pld;
vector<vector<int>> typedef graph;
unsigned long long int typedef ull;
//const int mod = 998244353;
const int mod = 1000000007;







//Note to self: Check for overflow

int up[200005];
bool wh[200005];
bool isbip=true;
int kolkosamlos=0;

stack<pair<int,pii>> stek;

void dsu(int a, int b)
{
    int wa=wh[a],wb=wh[b];
    while (up[a]>=0)
    {
        a=up[a];
        wa^=wh[a];
    }
    while (up[b]>=0)
    {
        b=up[b];
        wb^=wh[b];
    }

    if (a==b || !isbip)
    {
        if (!isbip || wa==wb) isbip=false,stek.push({-1,{-1,-1}}),stek.push({-1,{-1,-1}}),kolkosamlos+=2;
        else stek.push({0,{0,0}}),stek.push({0,{0,0}});
    }
    else
    {
        if (up[a]<up[b]) swap(a,b);
        stek.push({b,{up[b],wh[b]}});
        stek.push({a,{up[a],wh[a]}});
        if (wa==wb) wh[a]^=1;
        up[b]+=up[a],up[a]=b;
    }
}

void rollback()
{
    int rep=2;
    while (rep--)
    {
        auto it=stek.top(); stek.pop();
        if (it.xx!=-1){
            up[it.xx]=it.yy.xx,wh[it.xx]=it.yy.yy;
        }
        else
        {
            kolkosamlos--;
            if (kolkosamlos==0) isbip=true;
        }
    }
}

void printstack()
{
    vector<pair<int,pii>> sta;
    while (!stek.empty())
    {
        sta.pb(stek.top());
        stek.pop();
    }

    for (auto it : sta) cout<<it.xx<<": "<<it.yy.xx<<","<<it.yy.yy<<endl;
    cout<<endl;

    while (!sta.empty())
    {
        stek.push(sta.back());
        sta.popb();
    }
}

pii eds[200005];
int rmost[200005]; //prvi za koji zabrana [i,rmost[i]] daje bipartitivan graf

void binarna(int l, int r, int okle, int dokle) //popunjeni su [1,okle-1] i [r+1,n]
{
    //cout<<"["<<okle<<","<<dokle<<"] se slika u ["<<l<<","<<r<<"]"<<endl;
    //printstack();
    if (okle>dokle) return;

    if (l==r)
    {
        fff(i,okle,dokle) rmost[i]=l;
    }
    else
    {
        int mid=(l+r)/2;
        fff(i,mid+1,r) dsu(eds[i].xx,eds[i].yy);
        if (!isbip)
        {
            fff(i,mid+1,r) rollback();
            binarna(mid+1,r,okle,dokle);
        }
        else
        {
            int mokle=okle,kokle=0; //mid [okle,dokle]
            while (mokle<dokle)
            {
                dsu(eds[mokle].xx,eds[mokle].yy),kokle++;
                if (!isbip) break; mokle++;
            }
            //dakle, [okle,mokle] predstavlja one koji SU bipartitivni, [mokle,dokle] one koji NISU

            while (kokle--) rollback();
            binarna(l,mid,okle,mokle);

            fff(i,mid+1,r) rollback();
            fff(i,okle,mokle) dsu(eds[i].xx,eds[i].yy);
            binarna(mid+1,r,mokle+1,dokle);
            fff(i,okle,mokle) rollback();
        }
    }
}

int main()
{
    FAST;

    int n,m,q; cin>>n>>m>>q;
    fff(i,1,n) up[i]=-1,wh[i]=0; isbip=true;
    fff(i,1,m) cin>>eds[i].xx>>eds[i].yy;
    binarna(0,m,1,m);

    while (!stek.empty()) rollback();
    fff(i,1,m)
    {
        if (!isbip) rmost[i]=m+1;
        dsu(eds[i].xx,eds[i].yy);
    }
    //fff(i,1,m) cout<<i<<": "<<rmost[i]<<endl;
    
    while (q--)
    {
        int ll,rr; cin>>ll>>rr;
        if (rr>=rmost[ll]) cout<<"NO\n";
        else cout<<"YES\n";
    }




    /*fff(i,1,1000) up[i]=-1,wh[i]=0; isbip=true;

    while (true)
    {
        string t; cin>>t;
        if (t=="add")
        {
            int u,v; cin>>u>>v;
            dsu(u,v);
        }
        else if (t=="rollback")
        {
            rollback();
        }
        else cout<<"unsupported command!"<<endl;
        cout<<(isbip?"bipartite":"has odd cycle")<<endl;
    }*/
}

//Note to self: Check for overflow

/*

3 3 0
1 2
2 3
3 1

4 4 0
1 2
2 3
3 4
4 1

*/

Compilation message

Joker.cpp: In function 'void binarna(int, int, int, int)':
Joker.cpp:137:17: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
  137 |                 if (!isbip) break; mokle++;
      |                 ^~
Joker.cpp:137:36: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
  137 |                 if (!isbip) break; mokle++;
      |                                    ^~~~~
Joker.cpp: In function 'int main()':
Joker.cpp:13:20: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   13 | #define fff(i,a,b) for (int i = a; i <= b; i++)
      |                    ^~~
Joker.cpp:157:5: note: in expansion of macro 'fff'
  157 |     fff(i,1,n) up[i]=-1,wh[i]=0; isbip=true;
      |     ^~~
Joker.cpp:157:34: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
  157 |     fff(i,1,n) up[i]=-1,wh[i]=0; isbip=true;
      |                                  ^~~~~

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct
21 Correct 0 ms 340 KB Output is correct
22 Correct 0 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 0 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct
21 Correct 0 ms 340 KB Output is correct
22 Correct 0 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 0 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 2 ms 340 KB Output is correct
30 Correct 2 ms 340 KB Output is correct
31 Correct 2 ms 340 KB Output is correct
32 Correct 2 ms 384 KB Output is correct
33 Correct 2 ms 340 KB Output is correct
34 Correct 2 ms 340 KB Output is correct
35 Correct 2 ms 340 KB Output is correct
36 Correct 2 ms 340 KB Output is correct
37 Correct 2 ms 340 KB Output is correct
38 Correct 3 ms 468 KB Output is correct
39 Correct 2 ms 340 KB Output is correct
40 Correct 2 ms 340 KB Output is correct
41 Correct 1 ms 340 KB Output is correct
42 Correct 1 ms 340 KB Output is correct
43 Correct 2 ms 340 KB Output is correct
44 Correct 3 ms 340 KB Output is correct
45 Correct 2 ms 340 KB Output is correct
46 Correct 2 ms 340 KB Output is correct
47 Correct 2 ms 340 KB Output is correct
48 Correct 2 ms 340 KB Output is correct
49 Correct 2 ms 340 KB Output is correct
50 Correct 2 ms 340 KB Output is correct
51 Correct 1 ms 340 KB Output is correct
52 Correct 1 ms 340 KB Output is correct
53 Correct 2 ms 340 KB Output is correct
54 Correct 2 ms 340 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 172 ms 8636 KB Output is correct
4 Correct 327 ms 13344 KB Output is correct
5 Correct 110 ms 8984 KB Output is correct
6 Correct 144 ms 12620 KB Output is correct
7 Correct 137 ms 12564 KB Output is correct
8 Correct 136 ms 11884 KB Output is correct
9 Correct 147 ms 12128 KB Output is correct
10 Correct 214 ms 12736 KB Output is correct
11 Correct 160 ms 12496 KB Output is correct
12 Correct 182 ms 13152 KB Output is correct
13 Correct 101 ms 12092 KB Output is correct
14 Correct 138 ms 12452 KB Output is correct
15 Correct 197 ms 12812 KB Output is correct
16 Correct 213 ms 13188 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct
21 Correct 0 ms 340 KB Output is correct
22 Correct 0 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 0 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 172 ms 8636 KB Output is correct
30 Correct 327 ms 13344 KB Output is correct
31 Correct 110 ms 8984 KB Output is correct
32 Correct 144 ms 12620 KB Output is correct
33 Correct 137 ms 12564 KB Output is correct
34 Correct 136 ms 11884 KB Output is correct
35 Correct 147 ms 12128 KB Output is correct
36 Correct 214 ms 12736 KB Output is correct
37 Correct 160 ms 12496 KB Output is correct
38 Correct 182 ms 13152 KB Output is correct
39 Correct 101 ms 12092 KB Output is correct
40 Correct 138 ms 12452 KB Output is correct
41 Correct 197 ms 12812 KB Output is correct
42 Correct 213 ms 13188 KB Output is correct
43 Correct 187 ms 12836 KB Output is correct
44 Correct 314 ms 16024 KB Output is correct
45 Correct 143 ms 13456 KB Output is correct
46 Correct 137 ms 12908 KB Output is correct
47 Correct 149 ms 12892 KB Output is correct
48 Correct 173 ms 12576 KB Output is correct
49 Correct 216 ms 13204 KB Output is correct
50 Correct 161 ms 12752 KB Output is correct
51 Correct 169 ms 13132 KB Output is correct
52 Correct 195 ms 13392 KB Output is correct
53 Correct 109 ms 12404 KB Output is correct
54 Correct 182 ms 12772 KB Output is correct
55 Correct 195 ms 13280 KB Output is correct
56 Correct 207 ms 13504 KB Output is correct

Subtask #5
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct
21 Correct 0 ms 340 KB Output is correct
22 Correct 0 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 0 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 2 ms 340 KB Output is correct
30 Correct 2 ms 340 KB Output is correct
31 Correct 2 ms 340 KB Output is correct
32 Correct 2 ms 384 KB Output is correct
33 Correct 2 ms 340 KB Output is correct
34 Correct 2 ms 340 KB Output is correct
35 Correct 2 ms 340 KB Output is correct
36 Correct 2 ms 340 KB Output is correct
37 Correct 2 ms 340 KB Output is correct
38 Correct 3 ms 468 KB Output is correct
39 Correct 2 ms 340 KB Output is correct
40 Correct 2 ms 340 KB Output is correct
41 Correct 1 ms 340 KB Output is correct
42 Correct 1 ms 340 KB Output is correct
43 Correct 2 ms 340 KB Output is correct
44 Correct 3 ms 340 KB Output is correct
45 Correct 2 ms 340 KB Output is correct
46 Correct 2 ms 340 KB Output is correct
47 Correct 2 ms 340 KB Output is correct
48 Correct 2 ms 340 KB Output is correct
49 Correct 2 ms 340 KB Output is correct
50 Correct 2 ms 340 KB Output is correct
51 Correct 1 ms 340 KB Output is correct
52 Correct 1 ms 340 KB Output is correct
53 Correct 2 ms 340 KB Output is correct
54 Correct 2 ms 340 KB Output is correct
55 Correct 150 ms 7952 KB Output is correct
56 Correct 279 ms 15892 KB Output is correct
57 Correct 79 ms 10832 KB Output is correct
58 Correct 119 ms 10340 KB Output is correct
59 Correct 132 ms 10316 KB Output is correct
60 Correct 169 ms 10736 KB Output is correct
61 Correct 140 ms 10240 KB Output is correct
62 Correct 155 ms 10892 KB Output is correct
63 Correct 93 ms 9960 KB Output is correct
64 Correct 146 ms 10416 KB Output is correct
65 Correct 174 ms 10872 KB Output is correct

Subtask #6
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct
21 Correct 0 ms 340 KB Output is correct
22 Correct 0 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 0 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 2 ms 340 KB Output is correct
30 Correct 2 ms 340 KB Output is correct
31 Correct 2 ms 340 KB Output is correct
32 Correct 2 ms 384 KB Output is correct
33 Correct 2 ms 340 KB Output is correct
34 Correct 2 ms 340 KB Output is correct
35 Correct 2 ms 340 KB Output is correct
36 Correct 2 ms 340 KB Output is correct
37 Correct 2 ms 340 KB Output is correct
38 Correct 3 ms 468 KB Output is correct
39 Correct 2 ms 340 KB Output is correct
40 Correct 2 ms 340 KB Output is correct
41 Correct 1 ms 340 KB Output is correct
42 Correct 1 ms 340 KB Output is correct
43 Correct 2 ms 340 KB Output is correct
44 Correct 3 ms 340 KB Output is correct
45 Correct 2 ms 340 KB Output is correct
46 Correct 2 ms 340 KB Output is correct
47 Correct 2 ms 340 KB Output is correct
48 Correct 2 ms 340 KB Output is correct
49 Correct 2 ms 340 KB Output is correct
50 Correct 2 ms 340 KB Output is correct
51 Correct 1 ms 340 KB Output is correct
52 Correct 1 ms 340 KB Output is correct
53 Correct 2 ms 340 KB Output is correct
54 Correct 2 ms 340 KB Output is correct
55 Correct 172 ms 8636 KB Output is correct
56 Correct 327 ms 13344 KB Output is correct
57 Correct 110 ms 8984 KB Output is correct
58 Correct 144 ms 12620 KB Output is correct
59 Correct 137 ms 12564 KB Output is correct
60 Correct 136 ms 11884 KB Output is correct
61 Correct 147 ms 12128 KB Output is correct
62 Correct 214 ms 12736 KB Output is correct
63 Correct 160 ms 12496 KB Output is correct
64 Correct 182 ms 13152 KB Output is correct
65 Correct 101 ms 12092 KB Output is correct
66 Correct 138 ms 12452 KB Output is correct
67 Correct 197 ms 12812 KB Output is correct
68 Correct 213 ms 13188 KB Output is correct
69 Correct 187 ms 12836 KB Output is correct
70 Correct 314 ms 16024 KB Output is correct
71 Correct 143 ms 13456 KB Output is correct
72 Correct 137 ms 12908 KB Output is correct
73 Correct 149 ms 12892 KB Output is correct
74 Correct 173 ms 12576 KB Output is correct
75 Correct 216 ms 13204 KB Output is correct
76 Correct 161 ms 12752 KB Output is correct
77 Correct 169 ms 13132 KB Output is correct
78 Correct 195 ms 13392 KB Output is correct
79 Correct 109 ms 12404 KB Output is correct
80 Correct 182 ms 12772 KB Output is correct
81 Correct 195 ms 13280 KB Output is correct
82 Correct 207 ms 13504 KB Output is correct
83 Correct 150 ms 7952 KB Output is correct
84 Correct 279 ms 15892 KB Output is correct
85 Correct 79 ms 10832 KB Output is correct
86 Correct 119 ms 10340 KB Output is correct
87 Correct 132 ms 10316 KB Output is correct
88 Correct 169 ms 10736 KB Output is correct
89 Correct 140 ms 10240 KB Output is correct
90 Correct 155 ms 10892 KB Output is correct
91 Correct 93 ms 9960 KB Output is correct
92 Correct 146 ms 10416 KB Output is correct
93 Correct 174 ms 10872 KB Output is correct
94 Correct 183 ms 13600 KB Output is correct
95 Correct 248 ms 14088 KB Output is correct
96 Correct 139 ms 14128 KB Output is correct
97 Correct 132 ms 13616 KB Output is correct
98 Correct 158 ms 13648 KB Output is correct
99 Correct 132 ms 13400 KB Output is correct
100 Correct 185 ms 14328 KB Output is correct
101 Correct 177 ms 13608 KB Output is correct
102 Correct 200 ms 13924 KB Output is correct
103 Correct 215 ms 14236 KB Output is correct
104 Correct 146 ms 13300 KB Output is correct
105 Correct 190 ms 13760 KB Output is correct
106 Correct 219 ms 14204 KB Output is correct
107 Correct 87 ms 14392 KB Output is correct
108 Correct 192 ms 13528 KB Output is correct
109 Correct 198 ms 13348 KB Output is correct
110 Correct 191 ms 13404 KB Output is correct
111 Correct 211 ms 13448 KB Output is correct
112 Correct 187 ms 13344 KB Output is correct
113 Correct 201 ms 13532 KB Output is correct
114 Correct 188 ms 13380 KB Output is correct
115 Correct 191 ms 13372 KB Output is correct
116 Correct 184 ms 13336 KB Output is correct