Submission #414174

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
414174	2021-05-30 08:17:19	ACmachine	Swapping Cities (APIO20_swap)	C++17	0 / 100	2087 ms	25952 KiB

swap

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#include "swap.h"
#include <bits/stdc++.h>
using namespace std;
#define FOR(i, j, k, l) for(int i = (j); i < (k); i += (l))
#define FORD(i, j, k, l) for(int i = (j); i>=(k); i -= (l))
#define REP(i, n) FOR(i, 0, n, 1)
#define REPD(i, n) FORD(i, n, 0, 1)
#define pb push_back
typedef long long ll;
const int INF = (int)1e9 + 7;
const ll INFF = (ll)1e18;
struct dsu{
    vector<int> p;
    dsu(int n){
        p.resize(n, -1);
    }
    int find(int x){
        return (p[x] < 0 ? x : p[x] = find(p[x]));
    }
    bool same_set(int u, int v){
        return find(u) == find(v);
    }
    bool join(int u, int v){
        u = find(u);
        v = find(v);
        if(u == v)
            return false;
        if(-p[u] < -p[v])
            swap(u, v);
 
 
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Compilation message (stderr)

swap.cpp: In function 'void dfs(int, int, int, int)':
swap.cpp:5:44: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::array<int, 2> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    5 | #define FOR(i, j, k, l) for(int i = (j); i < (k); i += (l))
      |                                            ^
swap.cpp:7:19: note: in expansion of macro 'FOR'
    7 | #define REP(i, n) FOR(i, 0, n, 1)
      |                   ^~~
swap.cpp:50:5: note: in expansion of macro 'REP'
   50 |     REP(i, g[v].size()){
      |     ^~~

• Subtask 1: 0 / 6
• Subtask 2: 0 / 7
• Subtask 3: 0 / 17
• Subtask 4: 0 / 20
• Subtask 5: 0 / 23
• Subtask 6: 0 / 27