oj.uz

Submission #245816

# Submission time Handle Problem Language Result Execution time Memory
245816 2020-07-07T13:54:33 Z LittleFlowers__ Simurgh (IOI17_simurgh) C++17
30 / 100
 176 ms 4100 KB 
#include <bits/stdc++.h>
using namespace std;
#define in ({int x=0;int c=getchar(),n=0;for(;!isdigit(c);c=getchar()) n=(c=='-');for(;isdigit(c);c=getchar()) x=x*10+c-'0';n?-x:x;})
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
int rnd(int l,int r){return l+rng()%(r-l+1);}
#define fasty ios_base::sync_with_stdio(0),cin.tie(0);
#define forinc(a,b,c) for(int a=b,_c=c;a<=_c;++a)
#define fordec(a,b,c) for(int a=b,_c=c;a>=_c;--a)
#define forv(a,b) for(auto&a:b)
#define fi first
#define se second
#define pb push_back
#define ii pair<int,int>
#define mt make_tuple
#define all(a) a.begin(),a.end()
#define reset(f, x) memset(f, x, sizeof(f))
#define gg exit(0);
 
#include "simurgh.h"
 
 
const int N=510;
 
int mode,it;
int dd[N],fa[N],st[N],ed[N];
int id[N][N];
int asking[1000000];
vector<int> ask;
vector<int> ad[N];
 
void dfs(int u){
    st[u]=++it;
    dd[u]=1;
    forv(v,ad[u]){
        if(!dd[v]){
            if(mode && !asking[id[u][v]]) continue;
            if(!mode){
                ask.push_back(id[u][v]);
                asking[id[u][v]]=1;
            }
            fa[v]=u;
            dfs(v);
        }
    }
    ed[u]=it;
}
 
int anc(int u,int v){
    return st[u]<=st[v] && ed[u]>=ed[v];
}
 
vector<int> find_roads(int n,vector<int> u,vector<int> v){
    int m=u.size();
    forinc(i,0,m-1){
        ad[u[i]].pb(v[i]);
        ad[v[i]].pb(u[i]);
        id[u[i]][v[i]]=id[v[i]][u[i]]=i;
    }
    dfs(0);
    int tmp=count_common_roads(ask);
    if(tmp==n-1) return ask;
 
    vector<int> pos;
    forinc(i,0,m-1) if(!asking[i])
        pos.push_back(i);
 
    mode=1;
    auto tim=[&](int i,int rep){
        int j=0; while(j<ask.size() && ask[j]!=rep) j++;
        if(j==ask.size()){
            //cerr<<rep<<"\n";
            //forv(i,ask) cerr<<i<<" ";
            //gg
        }
        ask[j]=i;
        int to=count_common_roads(ask);
        if(to>tmp){
            tmp=to;
            asking[i]=1;
            asking[rep]=0;
            //cerr<<i<<"->"<<rep<<"\n";
            reset(dd,0);
            dfs(it=0);
            return 1;
        }
        ask[j]=rep;
        if(to<tmp){
            return 1;
        }
        return 0;
    };
    forv(i,pos){
        int x=u[i], y=v[i], found=0;
        while(!anc(x,y)){
            int rep=id[x][fa[x]];
            if(tim(i,rep)){
                found=1;
                break;
            }
            x=fa[x];
        }
        while(y!=x && !found){
            int rep=id[y][fa[y]];
            if(tim(i,rep)) break;
            y=fa[y];
        }
        //cerr<<"B\n";
    }
    return ask;
}

Compilation message

simurgh.cpp: In lambda function:
simurgh.cpp:69:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         int j=0; while(j<ask.size() && ask[j]!=rep) j++;
                        ~^~~~~~~~~~~
simurgh.cpp:70:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if(j==ask.size()){
            ~^~~~~~~~~~~~

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB correct
2 Correct 5 ms 384 KB correct
3 Correct 5 ms 384 KB correct
4 Correct 5 ms 384 KB correct
5 Correct 5 ms 384 KB correct
6 Correct 5 ms 384 KB correct
7 Correct 5 ms 384 KB correct
8 Correct 5 ms 512 KB correct
9 Correct 5 ms 384 KB correct
10 Correct 5 ms 384 KB correct
11 Correct 5 ms 384 KB correct
12 Correct 5 ms 384 KB correct
13 Correct 5 ms 384 KB correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB correct
2 Correct 5 ms 384 KB correct
3 Correct 5 ms 384 KB correct
4 Correct 5 ms 384 KB correct
5 Correct 5 ms 384 KB correct
6 Correct 5 ms 384 KB correct
7 Correct 5 ms 384 KB correct
8 Correct 5 ms 512 KB correct
9 Correct 5 ms 384 KB correct
10 Correct 5 ms 384 KB correct
11 Correct 5 ms 384 KB correct
12 Correct 5 ms 384 KB correct
13 Correct 5 ms 384 KB correct
14 Correct 10 ms 512 KB correct
15 Correct 9 ms 512 KB correct
16 Correct 10 ms 512 KB correct
17 Correct 8 ms 512 KB correct
18 Correct 7 ms 512 KB correct
19 Correct 8 ms 512 KB correct
20 Correct 7 ms 512 KB correct
21 Correct 8 ms 512 KB correct
22 Correct 6 ms 512 KB correct
23 Correct 6 ms 512 KB correct
24 Correct 6 ms 512 KB correct
25 Correct 5 ms 384 KB correct
26 Correct 5 ms 512 KB correct
27 Correct 6 ms 512 KB correct
28 Correct 5 ms 512 KB correct
29 Correct 5 ms 512 KB correct
30 Correct 6 ms 512 KB correct
31 Correct 6 ms 512 KB correct
32 Correct 6 ms 512 KB correct
33 Correct 6 ms 512 KB correct

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB correct
2 Correct 5 ms 384 KB correct
3 Correct 5 ms 384 KB correct
4 Correct 5 ms 384 KB correct
5 Correct 5 ms 384 KB correct
6 Correct 5 ms 384 KB correct
7 Correct 5 ms 384 KB correct
8 Correct 5 ms 512 KB correct
9 Correct 5 ms 384 KB correct
10 Correct 5 ms 384 KB correct
11 Correct 5 ms 384 KB correct
12 Correct 5 ms 384 KB correct
13 Correct 5 ms 384 KB correct
14 Correct 10 ms 512 KB correct
15 Correct 9 ms 512 KB correct
16 Correct 10 ms 512 KB correct
17 Correct 8 ms 512 KB correct
18 Correct 7 ms 512 KB correct
19 Correct 8 ms 512 KB correct
20 Correct 7 ms 512 KB correct
21 Correct 8 ms 512 KB correct
22 Correct 6 ms 512 KB correct
23 Correct 6 ms 512 KB correct
24 Correct 6 ms 512 KB correct
25 Correct 5 ms 384 KB correct
26 Correct 5 ms 512 KB correct
27 Correct 6 ms 512 KB correct
28 Correct 5 ms 512 KB correct
29 Correct 5 ms 512 KB correct
30 Correct 6 ms 512 KB correct
31 Correct 6 ms 512 KB correct
32 Correct 6 ms 512 KB correct
33 Correct 6 ms 512 KB correct
34 Incorrect 176 ms 1792 KB WA in grader: NO
35 Halted 0 ms 0 KB -

Subtask #4
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 384 KB correct
2 Correct 5 ms 384 KB correct
3 Incorrect 134 ms 4100 KB WA in grader: NO
4 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB correct
2 Correct 5 ms 384 KB correct
3 Correct 5 ms 384 KB correct
4 Correct 5 ms 384 KB correct
5 Correct 5 ms 384 KB correct
6 Correct 5 ms 384 KB correct
7 Correct 5 ms 384 KB correct
8 Correct 5 ms 512 KB correct
9 Correct 5 ms 384 KB correct
10 Correct 5 ms 384 KB correct
11 Correct 5 ms 384 KB correct
12 Correct 5 ms 384 KB correct
13 Correct 5 ms 384 KB correct
14 Correct 10 ms 512 KB correct
15 Correct 9 ms 512 KB correct
16 Correct 10 ms 512 KB correct
17 Correct 8 ms 512 KB correct
18 Correct 7 ms 512 KB correct
19 Correct 8 ms 512 KB correct
20 Correct 7 ms 512 KB correct
21 Correct 8 ms 512 KB correct
22 Correct 6 ms 512 KB correct
23 Correct 6 ms 512 KB correct
24 Correct 6 ms 512 KB correct
25 Correct 5 ms 384 KB correct
26 Correct 5 ms 512 KB correct
27 Correct 6 ms 512 KB correct
28 Correct 5 ms 512 KB correct
29 Correct 5 ms 512 KB correct
30 Correct 6 ms 512 KB correct
31 Correct 6 ms 512 KB correct
32 Correct 6 ms 512 KB correct
33 Correct 6 ms 512 KB correct
34 Incorrect 176 ms 1792 KB WA in grader: NO
35 Halted 0 ms 0 KB -