Submission #449856

#	Time	Username	Problem	Language	Result	Execution time	Memory
449856		Karliver	Crocodile's Underground City (IOI11_crocodile)	C++14	0 / 100	4 ms	6476 KiB

crocodile

#include "crocodile.h"
  
#include <bits/stdc++.h>

#define FIXED_FLOAT(x)  std::fixed <<std::setprecision(20) << (x)
#define all(v) (v).begin(), (v).end()
using namespace  std;
#define forn(i,n) for (int i = 0; i < (n); ++i)
#define rforn(i, n) for(int i = (n) - 1;i >= 0;--i)
using ll = long long;
int mod = (ll)1e9 + 7;
#define PI acos(-1)
typedef pair<int, int> pairs;

const int INF = 1e9 + 100;
const int N = 2e5 + 100;
const double eps = 1e-7;

template <class T> using V = vector<T>;  
template <class T> using VV = V<V<T>>;  

template <typename XPAX>
void ckma(XPAX &x, XPAX y) {
    x = (x < y ? y : x);
}
template <typename XPAX>
void ckmi(XPAX &x, XPAX y) {
    x = (x > y ? y : x);
}


V<pairs> g[N];
int dis[N][2];
int travel_plan(int n, int m, int R[][2], int L[], int K, int P[])
{
  memset(dis, INF, sizeof(dis));
  forn(i, m) {
    g[R[i][0]].emplace_back(R[i][1], L[i]);
    g[R[i][1]].emplace_back(R[i][0], L[i]);
  }

  priority_queue<pairs, V<pairs>, greater<pairs>> q;
  V<int> vis(n, 0);
  V<bool> exit(N, false);
  forn(i, K) {
    q.emplace(0, P[i]);
    exit[P[i]] = 1;
    dis[i][0] = dis[i][1] = 0;
  }

  while(q.size()) {
    auto [s, v] = q.top();
    q.pop();

    if(vis[v])continue;
    ++vis[v];

    for(auto [i, w] : g[v]) {
      int x = s + w;
      if(exit[i])continue;

      if(x < dis[i][0]) {
        swap(dis[i][1], dis[i][0]);
        dis[i][0] = x;
        q.emplace(x, i);
      }
      else if(x < dis[i][1]) {
        dis[i][1] = x;
        q.emplace(x, i);
      }
    }
  }

  return dis[0][1];



}

Compilation message (stderr)

crocodile.cpp: In function 'int travel_plan(int, int, int (*)[2], int*, int, int*)':
crocodile.cpp:52:10: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   52 |     auto [s, v] = q.top();
      |          ^
crocodile.cpp:58:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   58 |     for(auto [i, w] : g[v]) {
      |              ^

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