Submission #18649

#	Time	Username	Problem	Language	Result	Execution time	Memory
18649		ggoh	Crocodile's Underground City (IOI11_crocodile)	C++98	100 / 100	684 ms	181496 KiB

crocodile

#include "crocodile.h"
#include<cstdio>
#include<algorithm>
#include<cstring>
#include<vector>
#include<queue>
int a,b,c;
long long D[100003][2];
struct A{
    int to;long long cost;
};
std::vector<A>G[100003];
struct B{
    int pos;long long min;
};
std::priority_queue<B>PQ;
bool operator<(B aa,B bb){return aa.min>bb.min;}
int travel_plan(int N,int M,int R[][2],int L[],int K,int P[])
{
    a=N;
    b=M;
    c=K;
    for(int i=0;i<b;i++)
    {
        G[R[i][0]].push_back({R[i][1],(long long)L[i]});
        G[R[i][1]].push_back({R[i][0],(long long)L[i]});
    }
    long long X=1e9;
    int u;long long l;
    for(int i=0;i<a;i++)D[i][0]=D[i][1]=X*X;
    for(int i=0;i<c;i++)D[P[i]][0]=D[P[i]][1]=0;
    for(int i=0;i<c;i++)
    {
        for(int j=0;j<G[P[i]].size();j++)
        {
            u=G[P[i]][j].to;l=G[P[i]][j].cost;
            if(D[u][0]>l)
            {
                if(D[u][1]!=D[u][0])PQ.push({u,D[u][0]});
                D[u][1]=D[u][0];
                D[u][0]=l;
            }
            else if(D[u][1]>l)
            {
                D[u][1]=l;
                PQ.push({u,D[u][1]});
            }
        }
    }
    while(!PQ.empty())
    {
        B o=PQ.top();PQ.pop();
        if(D[o.pos][1]!=o.min)continue;
        for(int i=0;i<G[o.pos].size();i++)
        {
            u=G[o.pos][i].to;l=G[o.pos][i].cost;
            if(D[u][0]>l+o.min)
            {
                if(D[u][1]!=D[u][0])PQ.push({u,D[u][0]});
                D[u][1]=D[u][0];
                D[u][0]=l+o.min;
            }
            else if(D[u][1]>l+o.min)
            {
                D[u][1]=l+o.min;
                PQ.push({u,D[u][1]});
            }
        }
    }
    return (int)D[0][1];
}

• Subtask 1: 46 / 46
• Subtask 2: 43 / 43
• Subtask 3: 11 / 11