oj.uz

Submission #95274

# Submission time Handle Problem Language Result Execution time Memory
95274 2019-01-29T10:48:20 Z karma Ferries (NOI13_ferries) C++11
40 / 40
 267 ms 32044 KB 
#include<bits/stdc++.h>
#define For(i, a, b)  for(int i = a, _b = b; i <= _b; ++i)
#define Ford(i, a, b) for(int i = a, _b = b; i >= _b; --i)
#define FileName      "test"
#define ll            long long
#define ld            long double
#define ull           unsigned long long
#define Print(x)      cerr << #x << "is " << x << '\n';
#define pb            push_back
#define X             first
#define Y             second
//#define Karma
 
using namespace std;
 
template<typename T> inline void Cin(T &x)
{
    char c;
    T sign = 1;
    x = 0;
    for (c = getchar(); c < '0' || c > '9'; c = getchar())
        if (c == '-') sign = -1;
    for (; c >= '0' && c <= '9'; c = getchar())
        x = x * 10 + c - '0';
    x *= sign;
}
template <typename T> inline void Out(T x) {if(x > 9) Out(x / 10); putchar(x % 10 + '0');}
template <typename T> inline void Cout(T x, char c) {if(x < 0) putchar('-'); x = abs(x); Out(x); putchar(c);}
template <typename T, typename... Args> inline void Cin(T& a, Args&... args) {Cin(a);Cin(args...);}
template <typename T, typename... Args> inline void Cout(T a, char c, Args... args) {Cout(a, c);Cout(args...);}
 
typedef pair<ll, int> pii;
const int N = 3e5 + 7;
const ll oo = 1e18 + 7;
 
vector<int> a[N];
priority_queue<ll> c[N];
priority_queue<pii, vector<pii>, greater<pii>> pq;
int n, m, u, v;
ll w, d[N];
 
void Enter()
{
     Cin(n, m);
     while(m --)
     {
        Cin(u, v, w);
        c[u].push(w), a[v].emplace_back(u);
     }
}
 
void Solve()
{
     fill_n(d, n + 1, oo);
     d[n] = 0;
     pq.push({0, n});
     while(!pq.empty())
     {
          pii top = pq.top();
          pq.pop();
          if(d[top.Y] != top.X) continue;
          int u = top.Y;
          for(int v: a[u])
          {
              if(c[v].size())
              {
                  ll w = c[v].top();
                  c[v].pop();
                  if(d[v] > d[u] + w)
                  {
                      d[v] = d[u] + w;
                      pq.push({d[v], v});
                  }
              }
          }
     }
     cout << d[1];
}
 
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
#ifdef Karma
    freopen(FileName".inp", "r", stdin);
    freopen(FileName".out", "w", stdout);
#endif // Karma
 
    Enter();
    Solve();
 
    return 0;
}

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 16888 KB Output is correct
2 Correct 17 ms 16888 KB Output is correct
3 Correct 24 ms 18296 KB Output is correct
4 Correct 122 ms 30180 KB Output is correct
5 Correct 125 ms 30188 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 16760 KB Output is correct
2 Correct 16 ms 16936 KB Output is correct
3 Correct 23 ms 18168 KB Output is correct
4 Correct 64 ms 23536 KB Output is correct
5 Correct 132 ms 26232 KB Output is correct

Subtask #3
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 27 ms 18168 KB Output is correct
2 Correct 29 ms 18140 KB Output is correct
3 Correct 254 ms 30792 KB Output is correct
4 Correct 225 ms 31224 KB Output is correct
5 Correct 220 ms 30372 KB Output is correct

Subtask #4
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 182 ms 31036 KB Output is correct
2 Correct 175 ms 30940 KB Output is correct
3 Correct 247 ms 31928 KB Output is correct
4 Correct 232 ms 32044 KB Output is correct
5 Correct 267 ms 31988 KB Output is correct