Submission #708970

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
708970	2023-03-13T02:41:21 Z	null_awe	Graph (BOI20_graph)	C++14	Compilation error	0 ms	0 KB

Graph

#include <iostream>
#include <vector>
#include <queue>
#include <limits>
using namespace std;

#define pii pair<int, int>

const double EPS = 0.000001;

struct line {

  int m, b;

  line() {}

  line(int m, int b) : m(m), b(b) {}

  double combine(line other) {
    int mm = m - other.m, bb = other.b - b;
    if (mm == 0 && bb) {
      cout << "NO\n";
      exit(0);
    }
    if (mm == 0) return INT_MAX;
    return (double) bb / mm;
  }
};

int main() {
  int n, m; cin >> n >> m;
  vector<vector<pii>> adj(n);
  for (int i = 0; i < m; ++i) {
    int a, b, c; cin >> a >> b >> c; --a, --b;
    adj[a].push_back({b, c}), adj[b].push_back({a, c});
  }
  vector<line> lines(n); lines[0] = line(1, 0);
  vector<bool> vis(n);
  queue<int> q;
  vis[0] = true, q.push(0);
  double ans = 0;
  while (q.size()) {
    int v = q.front(); q.pop();
    for (pii p : adj[v]) {
      int u = p.first, c = p.second;
      line change(-lines[v].m, c - lines[v].b);
      if (!vis[u]) {
        vis[u] = true, q.push(u);
        lines[u] = change;
      } else {
        ans = lines[u].combine(change);
        if (ans < INT_MAX - 1) break;
      }
    }
  }
  // if (ans > INT_MAX - 1) ans = 0.5;
  if (ans > INT_MAX - 1) ans = 420.69;
  vector<double> values(n); values[0] = ans;
  vis.assign(n, false);
  q = queue<int>();
  vis[0] = true, q.push(0);
  while (q.size()) {
    int v = q.front(); q.pop();
    for (pii p : adj[v]) {
      int u = p.first, c = p.second;
      // cout << v << ' ' << u << '\n';
      if (vis[u]) continue;
      vis[u] = true, q.push(u);
      values[u] = c - values[v];
    }
  }
  cout << "YES\n";
  for (double val : values) cout << val << ' ';
  cout << '\n';
  return 0;
}

Compilation message

Graph.cpp: In member function 'double line::combine(line)':
Graph.cpp:25:25: error: 'INT_MAX' was not declared in this scope
   25 |     if (mm == 0) return INT_MAX;
      |                         ^~~~~~~
Graph.cpp:5:1: note: 'INT_MAX' is defined in header '<climits>'; did you forget to '#include <climits>'?
    4 | #include <limits>
  +++ |+#include <climits>
    5 | using namespace std;
Graph.cpp: In function 'int main()':
Graph.cpp:52:19: error: 'INT_MAX' was not declared in this scope
   52 |         if (ans < INT_MAX - 1) break;
      |                   ^~~~~~~
Graph.cpp:52:19: note: 'INT_MAX' is defined in header '<climits>'; did you forget to '#include <climits>'?
Graph.cpp:57:13: error: 'INT_MAX' was not declared in this scope
   57 |   if (ans > INT_MAX - 1) ans = 420.69;
      |             ^~~~~~~
Graph.cpp:57:13: note: 'INT_MAX' is defined in header '<climits>'; did you forget to '#include <climits>'?