Submission #713635

#	Time	Username	Problem	Language	Result	Execution time	Memory
713635		MarwenElarbi	Crocodile's Underground City (IOI11_crocodile)	C++14	0 / 100	6 ms	6092 KiB

crocodile

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#define vi vector<int>
#define ve vector
#define ll long long
#define vl vector<ll>
#define vll vector<pair<ll,ll>>
#define onbit __builtin_popcount
#define ii pair<int,int>
#define vvi vector<vi>
#define vii vector<ii>
#define gii greater<ii>
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define INF 1e18
#define eps 1e-7
#define eps1 1e-2
#define optimise ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
#define MAX_A 1e5+5
using namespace std;
using namespace __gnu_pbds;
template <class T>
using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
const int MOD = 1e9+7;
const int nax = 1e5+5;
const int MAX_VAL = 1e9;
double PI=3.14159265359;
int arx[8]={1,1,0,-1,-1,-1, 0, 1};
int ary[8]={0,1,1, 1, 0,-1,-1,-1};
typedef complex<int> Point;
#define X real()
#define Y imag()
template<typename T, typename U>
ostream & operator << (ostream &out, const pair<T, U> &c) {
    out << c.first << ' ' << c.second;
    return out;
}
 
template<typename T>
ostream & operator << (ostream &out, vector<T> &v) {
    const int sz = v.size();
    for (int i = 0; i < sz; i++) {
        if (i) out << ' ';
        out << v[i];
    }
    return out;
}
 
template<typename T>
istream & operator >> (istream &in, vector<T> &v) {
    for (T &x : v) in >> x;
    return in;
}
void setIO(string s) {
    freopen((s + ".in").c_str(), "r", stdin);
    freopen((s + ".out").c_str(), "w", stdout);
}
vector<pair<int,int>> adj[nax];
vector<int> dis(nax);
int dp[nax];
vector<bool> tab(nax);
bool vis[nax];
int dfs(int x,int p)
{
    if (tab[x]==1) return 0;
    if (dp[x]!=-1) return dp[x];
    dp[x]=1e9+7;
    //cout << x<<" ";
    priority_queue<pair<pair<int,int>,int>,vector<pair<pair<int,int>,int>>,greater<>> pq;
    for(auto u:adj[x])
    {
        if (u.fi==p) continue;
        pq.push({{dis[u.fi]+u.se,u.se},u.fi});
    }
    //cout << pq.top().se<<endl;
    pq.pop();
    while(!pq.empty())
    {
        int a=pq.top().fi.fi;
        int b=pq.top().fi.se;
        int c=pq.top().se;
        pq.pop();
        if (vis[c]) continue;
        vis[c]=1;
        dp[x]=min(dp[x],dfs(c,x)+b);
    }
    return dp[x];
}
ll travel_plan(int N, int M, int R[][2], int L[], int K, int P[]){
    int n = N;
    vi bahma(K);
    memset(dp,-1,sizeof dp);
    for(int i = 0; i < M; i++) {
        int x = R[i][0];
        int y = R[i][1];
        int t = L[i];
        bahma[i]=L[i];
        tab[L[i]]=1;
        adj[x].pb({y, t});
        adj[y].pb({x, t});
    }
    priority_queue<pair<int,int>,vector<pair<int,int>>,greater<>> pq;
    for (int i = 0; i < K; ++i)
    {
        pq.push({bahma[i],0});
        dis[bahma[i]]=0;
    }
    while(!pq.empty())
    {
        int x=pq.top().fi;
        int y=pq.top().se;
        pq.pop();
        for(auto u:adj[y])
        {
            int node=u.fi;
            int d=u.se;
            if (dis[node]<=x+d) continue;
            else{
                dis[node]=x+d;
                pq.push({x+d,node});
            }
        }
    }
    return dfs(0,-1);
}
/*int main(){
    optimise;
    #ifndef ONLINE_JUDGE
        freopen("input.txt", "r", stdin);
        freopen("output.txt", "w", stdout);
    #endif
    //setIO("pump");
   
}*/

Compilation message (stderr)

crocodile.cpp: In function 'int dfs(int, int)':
crocodile.cpp:81:13: warning: unused variable 'a' [-Wunused-variable]
   81 |         int a=pq.top().fi.fi;
      |             ^
crocodile.cpp: In function 'long long int travel_plan(int, int, int (*)[2], int*, int, int*)':
crocodile.cpp:92:9: warning: unused variable 'n' [-Wunused-variable]
   92 |     int n = N;
      |         ^
crocodile.cpp: In function 'void setIO(std::string)':
crocodile.cpp:57:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   57 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
crocodile.cpp:58:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   58 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 46
• Subtask 2: 0 / 43
• Subtask 3: 0 / 11