Submission #788613

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
788613	2023-07-20 12:14:53	WLZ	Toll (BOI17_toll)	C++17	100 / 100	110 ms	16580 KiB

toll

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#include <bits/stdc++.h>
using namespace std;
typedef pair<int, int> ii;
const int INF = 1e9;
template<typename T> inline istream& operator>>(istream &i, vector<T>& v) {
  for (int j = 0; j < (int) v.size(); j++) i >> v[j];
  return i;
}
template<typename T> inline ostream& operator<<(ostream &o, const vector<T>& v) {
  for (int i = 0; i < (int) v.size(); i++) o << v[i] << ' ';
    o << '\n';
  return o; 
}
struct node {
  vector<vector<int>> mat;
  node* left, *right;
  int i, j;
};
vector<vector<int>> combine(const vector<vector<int>>& mat1, const vector<vector<int>>& mat2) {
  if ((int) mat1.size() == 0) return mat2;
  if ((int) mat2.size() == 0) return mat1;
  int V = (int) mat1.size();
  vector<vector<int>> newMat(V, vector<int>(V, INF));
  for (int k = 0; k < V; k++) {
    for (int i = 0; i < V; i++) {
      for (int j = 0; j < V; j++) {
        newMat[i][j] = min(newMat[i][j], mat1[i][k] + mat2[k][j]);
 
 
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Compilation message (stderr)

toll.cpp: In function 'std::vector<std::vector<int> > combine(const std::vector<std::vector<int> >&, const std::vector<std::vector<int> >&)':
toll.cpp:34:13: warning: moving a local object in a return statement prevents copy elision [-Wpessimizing-move]
   34 |  return move(newMat);
      |         ~~~~^~~~~~~~
toll.cpp:34:13: note: remove 'std::move' call

• Subtask 1: 7 / 7
• Subtask 2: 10 / 10
• Subtask 3: 8 / 8
• Subtask 4: 31 / 31
• Subtask 5: 44 / 44