QOJ.ac

QOJ

ID题目提交者结果用时内存语言文件大小提交时间测评时间
#66025#5110. Splitstreamrumen_m#WA 0ms11596kbC++142.4kb2022-12-06 00:11:152022-12-06 00:11:18

Judging History

你现在查看的是最新测评结果

  • [2023-08-10 23:21:45]
  • System Update: QOJ starts to keep a history of the judgings of all the submissions.
  • [2022-12-06 00:11:18]
  • 评测
  • 测评结果:WA
  • 用时:0ms
  • 内存:11596kb
  • [2022-12-06 00:11:15]
  • 提交

answer

# include <bits/stdc++.h>
const int MAXN = 1e6+5;
using namespace std;
struct step
{
    char type;
    int a,b,c;
};
step w[MAXN];
int from[MAXN],to[MAXN],sz[MAXN];
bool fl[MAXN];
void bfs()
{
    queue <int> q;
    q.push(1);
    while(!q.empty())
    {
        int x = q.front();
        q.pop();
        //cout<<x<<endl;
        int id = to[x];
        if(id==0)continue;
        if(fl[x])continue;
        fl[x] = 1;
        if(w[id].type == 'S')
        {
            //cout<<"OK"<<endl;
            sz[w[id].b] = (sz[x]+1)/2;
            sz[w[id].c] = (sz[x]/2);
            q.push(w[id].b);
            q.push(w[id].c);
        }
        else
        {
            sz[w[id].c] = sz[w[id].a] + sz[w[id].b];
      //      cout<<w[id].c<<" --> "<<sz[w[id].c]<<endl;
            q.push(w[id].c);
        }
    }
}
int findit(int x, int k)
{
    //cout<<x<<" && "<<k<<" "<<sz[x]<<endl;
    if(x == 1) return k;
    int id = from[x];
    if(w[id].type == 'M')
    {
        int a = w[id].a;
        int b = w[id].b;
        if(2*min(sz[a],sz[b])>=k)
        {
     //       cout<<"Here"<<endl;
            if(k%2 == 0)
            {
                return findit(b,k/2);
            }
            else
                return findit(a,(k+1)/2);
        }else
        {
            if(sz[a] < sz[b])
            {
                return findit(b,k-sz[a]);
            }
            else
                return findit(a, k-sz[b]);
        }
    }
    else
    {
        int a = w[id].a;
        int b = w[id].b;
        int c = w[id].c;

        if(b==x)
        {
           return  findit(a,k*2-1);
        }
        else
            return findit(a,k*2);
    }
}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
    int n,q,m,i,j;
    cin>>m>>n>>q;
    for(i = 1;i<=q;i++)
    {
        cin>>w[i].type>>w[i].a>>w[i].b>>w[i].c;
        if(w[i].type == 'S')
        {
            to[w[i].a] = i;
            from[w[i].b] = i;
            from[w[i].c] = i;
        }
        else
        {
            to[w[i].a] = i;
            to[w[i].b] = i;
            from[w[i].c] = i;
        }
    }
    sz[1] = m;
    bfs();
    int x,k;
    for(i = 1;i<=q;i++)
    {
        cin>>x>>k;
        if(sz[x]<k)cout<<"none"<<endl;
        else
        cout<<findit(x,k)<<endl;;
    }
}

详细

Test #1:

score: 0
Wrong Answer
time: 0ms
memory: 11596kb

input:

5 8 26
M 8 9 13
S 2 4 5
S 1 2 3
M 6 5 8
S 4 9 10
S 10 14 15
S 3 6 7
S 7 11 12
2 3
2 4
3 2
3 3
4 2
4 3
5 1
5 2
6 1
6 2
7 1
7 2
8 2
8 3
9 1
9 2
10 1
10 2
11 1
11 2
12 1
13 3
13 4
14 1
14 2
15 1

output:

none
none
none
none
none
none
none
none
none
none
none
none
none
none
none
none
none
none
none
none
none
none
none
none
none
none

result:

wrong answer 1st lines differ - expected: '5', found: 'none'