제출 #718953

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
718953		Sam_a17	Graph (BOI20_graph)	C++17	0 / 100	4 ms	5204 KiB

Graph

#define _CRT_SECURE_NO_WARNINGS
#include <bits/stdc++.h>
//#include "temp.cpp"
#include <cstdio>
using namespace std;
 
#ifndef ONLINE_JUDGE
#define dbg(x) cerr << #x <<" "; print(x); cerr << endl;
#else
#define dbg(x)
#endif
 
#define sz(x) (int((x).size()))
#define len(x) (int)x.length()
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define clr(x) (x).clear()
#define uniq(x) x.resize(unique(all(x)) - x.begin());
#define blt(x) __builtin_popcount(x)
 
#define pb push_back
#define popf pop_front
#define popb pop_back
 
void print(long long t) {cerr << t;}
void print(int t) {cerr << t;}
void print(string t) {cerr << t;}
void print(char t) {cerr << t;}
void print(double t) {cerr << t;}
void print(long double t) {cerr << t;}
void print(unsigned long long t) {cerr << t;}
 
template <class T, class V> void print(pair <T, V> p);
template <class T> void print(vector <T> v);
template <class T> void print(set <T> v);
template <class T, class V> void print(map <T, V> v);
template <class T> void print(multiset <T> v);
template <class T, class V> void print(T v[],V n) {cerr << "["; for(int i = 0; i < n; i++) {print(v[i]); cerr << " "; } cerr << "]";}
template <class T, class V> void print(pair <T, V> p) {cerr << "{"; print(p.first); cerr << ","; print(p.second); cerr << "}";}
template <class T> void print(vector <T> v) {cerr << "[ "; for (T i : v) {print(i); cerr << " ";} cerr << "]";}
template <class T> void print(deque <T> v) {cerr << "[ "; for (T i : v) {print(i); cerr << " ";} cerr << "]";}
template <class T> void print(set <T> v) {cerr << "[ "; for (T i : v) {print(i); cerr << " ";} cerr << "]";}
template <class T> void print(multiset <T> v) {cerr << "[ "; for (T i : v) {print(i); cerr << " ";} cerr << "]";}
template <class T, class V> void print(map <T, V> v) {cerr << "[ "; for (auto i : v) {print(i); cerr << " ";} cerr << "]";}
 
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
#define nl '\n'
 
// for grid problems
int dx[8] = {-1,0,1,0,1,-1,1,-1};
int dy[8] = {0,1,0,-1,1,1,-1,-1};
 
// lowest / (1 << 17) >= 1e5 / (1 << 18) >= 2e5 / (1 << 21) >= 1e6
void fastIO() {
  ios_base::sync_with_stdio(false);
  cin.tie(nullptr); cout.tie(nullptr);
}
// file in/out
void setIO(string str = "") {
  fastIO();
 
  if (str != "") {
    freopen((str + ".in").c_str(), "r", stdin);
    freopen((str + ".out").c_str(), "w", stdout);
  }
}
// Indexed Set
template <class T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
const int N = 1e5 + 10;
vector<pair<pair<int, int>, int>> edges, redges;
vector<pair<int, int>> adj[N];
vector<int> nodes;
int n, m, vis[N];
int qq[N], it = 1;
bool flag = true;

void dfs(int node) {
  nodes.push_back(node);
  for(auto i: adj[node]) {

    if(vis[i.first]) {
      if(qq[node] + qq[i.first] != i.second) {
        flag = false;
        return;
      }

      assert(vis[i.first] == it);
      continue;
    }

    vis[i.first] = it;
    qq[i.first] = i.second - qq[node];
    dfs(i.first);

    if(!flag) {
      return;
    }
  }
}

void solve_() {
  cin >> n >> m;

  for(int i = 1; i <= m; i++) {
    int a, b, c; cin >> a >> b >> c;
    adj[a].push_back({b, c * 10});
    adj[b].push_back({a, c * 10});
    edges.push_back({{a, b}, c * 10});
  }

  int cnt = 0;
  for(int i = 1; i <= n; i++) {
    if(!vis[i]) {
      cnt++;
      long long good_color = -1, ss = INT64_MAX;
      for(int j = -300; j <= 300; j++) {
        qq[i] = j;

        vis[i] = it;
        flag = true;
        dfs(i);

        if(flag) {
          long long sm = 0;
          for(auto k: nodes) {
            sm += abs(qq[k]);
          }

          if(sm < ss) {
            ss = sm;
            good_color = j;
          }
        }

        for(auto k: nodes) {
          vis[k] = 0;
        }
        nodes.clear();
      }

      if(good_color == -1) {
        cout << "NO" << '\n';
        return;
      } else {
        vis[i] = it;
        qq[i] = good_color;
        dfs(i);
        nodes.clear();
      }

      redges.clear();
    }
    it++;
  }

  cout << "YES" << '\n';
  for(int i = 1; i <= n; i++) {
    long double xx = qq[i];
    xx /= 10;
    cout << xx << " ";
  }
  cout << '\n';
}
 
int main() {
  setIO();
 
  auto solve = [&](int test_case)-> void {
    while(test_case--) {
      solve_();
    }
  };
 
  int test_cases = 1;
  // cin >> test_cases;
  solve(test_cases);
 
  return 0;
} 

컴파일 시 표준 에러 (stderr) 메시지

Graph.cpp: In function 'void setIO(std::string)':
Graph.cpp:64:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   64 |     freopen((str + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Graph.cpp:65:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   65 |     freopen((str + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 12
• Subtask 3: 0 / 17
• Subtask 4: 0 / 24
• Subtask 5: 0 / 42