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Submission #1093171

# Submission time Handle Problem Language Result Execution time Memory
1093171 2024-09-26T06:55:09 Z alexander707070 Cyberland (APIO23_cyberland) C++17
0 / 100
 577 ms 272984 KB 
#include<bits/stdc++.h>
#define MAXN 100007
using namespace std;

const long double inf=1e15;

struct edge{
    int to,s;
    long double cost;

    inline friend bool operator < (edge fr,edge sc){
        return fr.cost>sc.cost;
    }
};

int n,m,k;
vector<edge> v[MAXN][31];
long double dist[MAXN][31];
long double ans;
bool vis[MAXN][31];
int ability[MAXN];

priority_queue<edge> q;

bool li[MAXN];

bool dfs(int x,int y){
    if(x==y)return true;

    li[x]=true;
    for(edge e:v[x][0]){
        if(li[e.to])continue;
        if(dfs(e.to,y))return true;
    }

    return false;
}

long double gg(long double d,int a,int b){
    if(a>b)return d/2;
    return d;
}

void dijkstra(){

    while(!q.empty()){
        edge curr=q.top();
        q.pop();

        if(vis[curr.to][curr.s])continue;
        vis[curr.s][curr.to]=true;

        for(edge e:v[curr.to][curr.s]){
            if(vis[e.to][e.s] or dist[e.to][e.s]<=gg(dist[curr.to][curr.s],curr.s,e.s)+e.cost)continue;
            dist[e.to][e.s]=gg(dist[curr.to][curr.s],curr.s,e.s)+e.cost;
            q.push({e.to,e.s,dist[e.to][e.s]});
        }
    }

}

void reset(){
    for(int i=1;i<=n;i++)li[i]=false;

    for(int i=1;i<=n;i++){
        for(int f=0;f<=k;f++){
            v[i][f].clear();
            vis[i][f]=false;
        }
    }
}

double solve(int N, int M, int K, int H, vector<int> X, vector<int> Y, vector<int> C, vector<int> arr){
    n=N; m=M; k=K; H++;

    reset();

    for(int i=1;i<=m;i++){
        X[i-1]++; Y[i-1]++;
        
        for(int f=0;f<=k;f++){
            if(X[i-1]!=H)v[X[i-1]][f].push_back({Y[i-1],f,C[i-1]});
            if(Y[i-1]!=H)v[Y[i-1]][f].push_back({X[i-1],f,C[i-1]});

            //if(f>0 and arr[X[i-1]-1]==2 and X[i-1]!=H)v[X[i-1]][f].push_back({Y[i-1],f-1,C[i-1]});
            //if(f>0 and arr[Y[i-1]-1]==2 and Y[i-1]!=H)v[Y[i-1]][f].push_back({X[i-1],f-1,C[i-1]});
        }
    }

    if(!dfs(1,H))return 1/0;

    for(int i=1;i<=n;i++){
        for(int f=0;f<=k;f++){
            dist[i][f]=inf;
        }
    }

    for(int i=1;i<=n;i++){
        ability[i]=arr[i-1];
        
        if(ability[i]==0 or i==1){
            dist[i][k]=0;
            q.push({i,k,0});
        }
    }

    dijkstra();

    ans=dist[H][k];
    for(int i=0;i<=k;i++){
      //  ans=min(ans,dist[H][i]);
    }

    return ans;
}

/*int main(){

    cout<<solve(3,2,30,2,{0,1},{1,2},{5,4},{1,0,1})<<"\n";
    cout<<solve(3, 2, 30, 2, {1, 2}, {2, 0}, {12, 4}, {1, 2, 1})<<"\n";
    cout<<solve(4, 4, 30, 3, {0, 0, 1, 2}, {1, 2, 3, 3}, {5, 4, 2, 4}, {1, 0, 2, 1})<<"\n";

    return 0;
}*/

Compilation message

cyberland.cpp: In function 'double solve(int, int, int, int, std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>)':
cyberland.cpp:82:66: warning: narrowing conversion of 'C.std::vector<int>::operator[](((std::vector<int>::size_type)(i - 1)))' from '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'} to 'long double' [-Wnarrowing]
   82 |             if(X[i-1]!=H)v[X[i-1]][f].push_back({Y[i-1],f,C[i-1]});
      |                                                                  ^
cyberland.cpp:83:66: warning: narrowing conversion of 'C.std::vector<int>::operator[](((std::vector<int>::size_type)(i - 1)))' from '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'} to 'long double' [-Wnarrowing]
   83 |             if(Y[i-1]!=H)v[Y[i-1]][f].push_back({X[i-1],f,C[i-1]});
      |                                                                  ^
cyberland.cpp:90:26: warning: division by zero [-Wdiv-by-zero]
   90 |     if(!dfs(1,H))return 1/0;
      |                         ~^~

Subtask #1
0.0 / 5.0

# Verdict Execution time Memory Grader output
1 Runtime error 85 ms 149224 KB Execution killed with signal 4
2 Halted 0 ms 0 KB -

Subtask #2
0.0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 93 ms 80644 KB Wrong Answer.
2 Halted 0 ms 0 KB -

Subtask #3
0.0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 105 ms 80664 KB Wrong Answer.
2 Halted 0 ms 0 KB -

Subtask #4
0.0 / 19.0

# Verdict Execution time Memory Grader output
1 Incorrect 248 ms 250372 KB Wrong Answer.
2 Halted 0 ms 0 KB -

Subtask #5
0.0 / 7.0

# Verdict Execution time Memory Grader output
1 Runtime error 93 ms 154208 KB Execution killed with signal 4
2 Halted 0 ms 0 KB -

Subtask #6
0.0 / 16.0

# Verdict Execution time Memory Grader output
1 Runtime error 102 ms 163408 KB Execution killed with signal 4
2 Halted 0 ms 0 KB -

Subtask #7
0.0 / 29.0

# Verdict Execution time Memory Grader output
1 Runtime error 86 ms 149332 KB Execution killed with signal 4
2 Halted 0 ms 0 KB -

Subtask #8
0.0 / 3.0

# Verdict Execution time Memory Grader output
1 Runtime error 577 ms 272984 KB Execution killed with signal 4
2 Halted 0 ms 0 KB -