제출 #758424

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
758424	2023-06-14 15:28:06	yellowtoad	자매 도시 (APIO20_swap)	C++17	100 / 100	453 ms	87244 KiB

swap

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#include "swap.h"
#include <iostream>
#include <vector>
#include <algorithm>
#define f first
#define s second
#define int long long
using namespace std;
 
int n, m, freq[100010], p[100010], id[100010], par[300010][20], depth[300010];
bool can[300010];
pair<int,pair<int,int>> ed[200010];
vector<int> edge[300010];
 
int dsu(int u) {
    if (p[u] == u) return u;
    return (p[u] = dsu(p[u]));
}
 
void dfs(int u, int d) {
    int v = par[u][0];
    depth[u] = d;
    for (int i = 1; i <= 19; i++) {
        if (v == -1) {
            par[u][i] = -1;
            continue;
        }
        par[u][i] = par[v][i-1];
        v = par[u][i];
    }
 
 
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컴파일 시 표준 에러 (stderr) 메시지

swap.cpp: In function 'void dfs(long long int, long long int)':
swap.cpp:31:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |     for (int i = 0; i < edge[u].size(); i++) dfs(edge[u][i],d+1);
      |                     ~~^~~~~~~~~~~~~~~~
swap.cpp: In function 'void init(int, int, std::vector<int>, std::vector<int>, std::vector<int>)':
swap.cpp:59:43: warning: unused variable 'w' [-Wunused-variable]
   59 |         int u = ed[i].s.f, v = ed[i].s.s, w = ed[i].f;
      |                                           ^

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