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Submission #347776

# Submission time Handle Problem Language Result Execution time Memory
347776 2021-01-13T11:52:04 Z soroush One-Way Streets (CEOI17_oneway) C++14
100 / 100
 205 ms 83180 KB 
/*
#pragma GCC optimize("O2")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#pragma GCC target("avx,avx2,sse,sse2,fma")
//*/
#include <bits/stdc++.h>
 
using namespace std;
 
typedef long long ll;
typedef long double ld;
typedef pair<int , int> pii;
 
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
 
const ll maxn = 3e6;
const ll mod = 1e9+7;
const ld PI = acos((ld)-1);
 
#define pb push_back
#define endl '\n'
#define dokme(x) cout << x , exit(0)
#define migmig ios::sync_with_stdio(false),cin.tie(0),cout.tie(0)
#define ms(x , y) memset(x , y , sizeof x)
ll pw(ll a, ll b, ll md = mod){ll res = 1;while(b){if(b&1){res=(a*res)%md;}a=(a*a)%md;b>>=1;}return(res);}
 
#define For(i,a,b) for(int i=a;i<=b;i++)
#define fi first
#define se second
int n,m,u,v,t,a[maxn],b[maxn],ans[maxn],dx[maxn];
vector<pair<int,int> >ke[maxn];
void dfs(int u,int x)
{
    dx[u]=1;
    for(auto p:ke[u])
    {
        int v=p.fi;
        int y=p.se;
        if(y!=-x)
        {
            if(!dx[v])
            {
                dfs(v,y);
                a[u]+=a[v];
                b[u]+=b[v];
            }
            else
                if(dx[v]==1)
                {
                    ans[abs(y)]=2;
                    b[u]++;
                    b[v]--;
                }
        }
    }
    if(b[u]>0||a[u]==0) ans[abs(x)]=2;
    else
    {
        int v=a[u];
        if(x<0)
        {
            x=-x;
            v=-v;
        }
        if(v>0) ans[x]=1;
        else ans[x]=3;
    }
    dx[u]=2;
}
int main()
{
    cin >> n >> m;
    For(i,1,m)
    {
        cin >> u >> v;
        ke[u].push_back({v,i});
        ke[v].push_back({u,-i});

    }
    cin >> t;
    For(i,1,t)
    {
        cin >> u >> v;
        a[u]++;
        a[v]--;
    }
    For(i,1,n)
        if(!dx[i])
            dfs(i,0);
    For(i,1,m)
    {
        if(ans[i]==1) cout<<'L';
        if(ans[i]==2) cout<<'B';
        if(ans[i]==3) cout<<'R';
    }
}

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 42 ms 70764 KB Output is correct
2 Correct 41 ms 70764 KB Output is correct
3 Correct 43 ms 70892 KB Output is correct
4 Correct 42 ms 70892 KB Output is correct
5 Correct 42 ms 70892 KB Output is correct
6 Correct 41 ms 70892 KB Output is correct
7 Correct 47 ms 70892 KB Output is correct
8 Correct 42 ms 71020 KB Output is correct
9 Correct 42 ms 70892 KB Output is correct
10 Correct 41 ms 70892 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 42 ms 70764 KB Output is correct
2 Correct 41 ms 70764 KB Output is correct
3 Correct 43 ms 70892 KB Output is correct
4 Correct 42 ms 70892 KB Output is correct
5 Correct 42 ms 70892 KB Output is correct
6 Correct 41 ms 70892 KB Output is correct
7 Correct 47 ms 70892 KB Output is correct
8 Correct 42 ms 71020 KB Output is correct
9 Correct 42 ms 70892 KB Output is correct
10 Correct 41 ms 70892 KB Output is correct
11 Correct 121 ms 76524 KB Output is correct
12 Correct 133 ms 77420 KB Output is correct
13 Correct 135 ms 78480 KB Output is correct
14 Correct 173 ms 79212 KB Output is correct
15 Correct 152 ms 79212 KB Output is correct
16 Correct 144 ms 77476 KB Output is correct
17 Correct 134 ms 78828 KB Output is correct
18 Correct 176 ms 77316 KB Output is correct
19 Correct 133 ms 79980 KB Output is correct
20 Correct 125 ms 77036 KB Output is correct
21 Correct 125 ms 76908 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 42 ms 70764 KB Output is correct
2 Correct 41 ms 70764 KB Output is correct
3 Correct 43 ms 70892 KB Output is correct
4 Correct 42 ms 70892 KB Output is correct
5 Correct 42 ms 70892 KB Output is correct
6 Correct 41 ms 70892 KB Output is correct
7 Correct 47 ms 70892 KB Output is correct
8 Correct 42 ms 71020 KB Output is correct
9 Correct 42 ms 70892 KB Output is correct
10 Correct 41 ms 70892 KB Output is correct
11 Correct 121 ms 76524 KB Output is correct
12 Correct 133 ms 77420 KB Output is correct
13 Correct 135 ms 78480 KB Output is correct
14 Correct 173 ms 79212 KB Output is correct
15 Correct 152 ms 79212 KB Output is correct
16 Correct 144 ms 77476 KB Output is correct
17 Correct 134 ms 78828 KB Output is correct
18 Correct 176 ms 77316 KB Output is correct
19 Correct 133 ms 79980 KB Output is correct
20 Correct 125 ms 77036 KB Output is correct
21 Correct 125 ms 76908 KB Output is correct
22 Correct 192 ms 79980 KB Output is correct
23 Correct 192 ms 78572 KB Output is correct
24 Correct 205 ms 78572 KB Output is correct
25 Correct 189 ms 83180 KB Output is correct
26 Correct 196 ms 79724 KB Output is correct
27 Correct 193 ms 78572 KB Output is correct
28 Correct 127 ms 74732 KB Output is correct
29 Correct 184 ms 77804 KB Output is correct
30 Correct 179 ms 77932 KB Output is correct
31 Correct 188 ms 78316 KB Output is correct
32 Correct 185 ms 80108 KB Output is correct