QOJ.ac

QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#875406#7181. Graph CutsHeyJinhwi#WA 9ms16172kbC++141.9kb2025-01-29 18:00:452025-01-29 18:00:46

Judging History

This is the latest submission verdict.

  • [2025-01-29 18:00:46]
  • Judged
  • Verdict: WA
  • Time: 9ms
  • Memory: 16172kb
  • [2025-01-29 18:00:45]
  • Submitted

answer

#include <bits/stdc++.h>
using namespace std;
typedef unsigned long long ll;
map<int,ll> mp[1<<17];
ll valid[1600];
ll calc[1600];
ll cur[1600];
vector<int> a[1<<17];
vector<pair<int,ll>> b[1<<17];
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int n,m;cin>>n>>m;
    for(int i=0;i<m;i++)
    {
        int s,t;cin>>s>>t;
        if(mp[s][i/64]==0)
        {
            a[s].push_back(i/64);
        }
        mp[s][i/64]|=(1<<(i%64));

        if(mp[t][i/64]==0)
        {
            a[t].push_back(i/64);
        }
        mp[t][i/64]|=(1<<(i%64));
    }
    for(int i=1;i<=n;i++)
    {
        for(int j=0;j<a[i].size();j++)
        {
            int t=a[i][j];
            b[i].push_back({t,mp[i][t]});
        }
    }
    for(int i=0;i<=(n-1)/64;i++)valid[i]=-1;
    int q;cin>>q;
    char x[3]={};
    while(q--)
    {
        cin>>x;
        if(x[0]!='?')
        {
            int v;cin>>v;
            for(int i=0;i<b[v].size();i++)
            {
                int t=b[v][i].first;
                ll s=b[v][i].second;
                cur[t]^=s;
            }
        }
        else
        {
            int flag=0;
            for(int i=0;i<=(n-1)/64;i++)
            {
                calc[i]=valid[i]&cur[i];
                if(calc[i]!=0)
                {
                    for(int j=0;j<64;j++)
                    {
                        if(calc[i]&(1LL<<j))
                        {
                            cout<<i*64+j+1<<'\n';
                            valid[i]^=(1LL<<j);
                            break;
                        }
                    }
                    flag=1;
                    break;
                }
            }
            if(flag==0)
            {
                cout<<"0\n";
            }
        }
    }
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 1ms
memory: 15908kb

input:

4 5
1 2
1 3
1 4
2 3
2 4
10
+ 1
+ 2
?
?
?
?
?
- 2
?
?

output:

2
3
4
5
0
1
0

result:

ok q=10

Test #2:

score: 0
Accepted
time: 2ms
memory: 15936kb

input:

0 0
0

output:


result:

ok q=0

Test #3:

score: 0
Accepted
time: 3ms
memory: 16112kb

input:

0 0
1
?

output:

0

result:

ok q=1

Test #4:

score: -100
Wrong Answer
time: 9ms
memory: 16172kb

input:

1000 2000
1 50
1 88
331 1
1 352
1 497
2 32
2 282
550 2
989 2
334 3
3 665
4 38
4 69
4 343
4 451
589 4
917 4
89 5
5 162
675 5
681 6
7 22
127 7
7 592
7 672
787 7
8 310
107 9
9 137
184 9
9 244
378 9
446 9
9 658
883 9
65 10
75 10
414 10
10 468
686 10
245 11
269 11
11 386
403 11
493 11
394 12
493 12
565 1...

output:

4
5
6
7
9
12
14
15
17
19
24
25
26
29
30
31
65
67
70
72
73
74
76
77
78
79
84
86
87
88
90
91
93
129
130
132
133
134
137
139
141
144
145
147
148
149
150
152
71
89
155
157
158
159
160
161
162
163
164
165
166
27
167
168
169
170
171
172
173
174
135
175
2
176
177
178
179
180
181
142
182
183
184
185
186
75
...

result:

wrong answer Edge exists, but not found