oj.uz

Submission #345755

# Submission time Handle Problem Language Result Execution time Memory
345755 2021-01-08T02:50:07 Z daniel920712 Crocodile's Underground City (IOI11_crocodile) C++14
0 / 100
 7 ms 9708 KB 
#include "crocodile.h"
#include <vector>
#include <utility>
#include <algorithm>
#include <queue>
#include <map>
using namespace std;
bool is[100005];
long long small[5][100005];
vector < pair < long long , long long > > Next[100005];
vector < pair < long long , long long > > Next2[100005];
map < long long , long long > how[100005];
bool have[100005]={0};
long long ans=0;
priority_queue < pair < long long , pair < long long , long long > > , vector < pair < long long , pair < long long , long long > > > , greater < pair < long long , pair < long long , long long > > > > dij;
long long F(long long fa,long long here,long long con)
{
    long long t;
    vector < pair < long long , long long > > tt;
    //printf("%lld %lld\n",here,con);
    if(is[here])
    {
        ans=con;
        return 0;
    }
    for(auto i:Next[here]) if(small[1][i.first]!=-1&&i.first!=fa) tt.push_back(make_pair(small[1][i.first]+i.second,i.first));


    sort(tt.begin(),tt.end());
    //printf("%lld %d\n",here,tt.size());
    if(tt.size()>=2)
    {
        return F(here,tt[1].second,con+how[here][tt[1].second]);
    }
    else while(1) ;
}
int travel_plan(int N, int M, int R[][2], int L[], int K, int P[])
{
    int i;
    long long a,b,c;
    for(i=0;i<M;i++)
    {
        Next[R[i][0]].push_back(make_pair((long long) R[i][1],(long long) L[i]));
        Next[R[i][1]].push_back(make_pair((long long) R[i][0],(long long) L[i]));
        how[R[i][0]][R[i][1]]=L[i];
        how[R[i][1]][R[i][0]]=L[i];
    }
    for(i=0;i<N;i++)
    {
        small[0][i]=-1;
        small[1][i]=-1;
    }
    for(i=0;i<K;i++)
    {
        is[P[i]]=1;
        dij.push(make_pair(0,make_pair(P[i],-1)));
        small[0][P[i]]=0;
        small[1][P[i]]=0;

    }
    while(!dij.empty())
    {
        a=dij.top().first;
        b=dij.top().second.first;
        c=dij.top().second.second;
        dij.pop();
        if(small[0][b]==-1) small[0][b]=a;
        else if(small[1][b]==-1) small[1][b]=a;
        else if(c!=-1) continue;
        //printf("%lld %lld %lld\n",a,b,c);
        //if(c!=-1) Next2[c].push_back(make_pair(b,how[b][c]));
        for(auto i:Next[b])
        {
            dij.push(make_pair(i.second+a,make_pair(i.first,b)));
        }
    }
    //for(i=0;i<N;i++) printf("aa %lld %lld\n",small[0][i],small[1][i]);
    F(-1,0,0);
    return ans;
}

Compilation message

crocodile.cpp: In function 'long long int F(long long int, long long int, long long int)':
crocodile.cpp:18:15: warning: unused variable 't' [-Wunused-variable]
   18 |     long long t;
      |               ^

Subtask #1
0 / 46.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 9708 KB Output is correct
2 Incorrect 6 ms 9708 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 9708 KB Output is correct
2 Incorrect 6 ms 9708 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 9708 KB Output is correct
2 Incorrect 6 ms 9708 KB Output isn't correct
3 Halted 0 ms 0 KB -