1074 Reversing Linked List (25 分)
作者:互联网
#include <bits/stdc++.h>
#define LOCAL
using namespace std;
template<typename A, typename B> ostream& operator<<(ostream &os, const pair<A, B> &p) { return os << '(' << p.first << ", " << p.second << ')'; }
template<typename T_container, typename T = typename enable_if<!is_same<T_container, string>::value, typename T_container::value_type>::type> ostream& operator<<(ostream &os, const T_container &v) { os << '{'; string sep; for (const T &x : v) os << sep << x, sep = ", "; return os << '}'; }
void dbg_out() { cerr << endl; }
template<typename Head, typename... Tail> void dbg_out(Head H, Tail... T) { cerr << ' ' << H; dbg_out(T...); }
#ifdef LOCAL
#define dbg(...) cerr << "(" << #__VA_ARGS__ << "):", dbg_out(__VA_ARGS__)
#else
#define dbg(...)
#endif
#define vec vector
#define ll long long
#define ld long double
#define sza(x) ((int)x.size())
#define all(a) (a).begin(), (a).end()
const int MAX_N = 1e5 + 5;
const ll MOD = 1e9 + 7;
const ll INF = 1e9;
const ld EPS = 1e-9;
map<int, pair<int, int>> li;
int start, n, k;
int dfs(int add){
if(add == -1) return -1;
// cout << add << endl;
int e = add;
int cnt = 1;
while(cnt < k && li[e].second != -1){
e = li[e].second;
cnt ++;
}
if(cnt < k){
return add;
}
int p = li[e].second;
int u = add, nxt = li[u].second;
while(u != e){
int nnxt = li[nxt].second;
li[nxt].second = u;
u = nxt;
nxt = nnxt;
}
li[add].second = dfs(p);
return u;
}
void solve() {
cin >> start >> n >> k;
for(int i = 0; i < n; i ++){
int a, b, c;
cin >> a >> b >> c;
li[a] = {b, c};
}
int add = dfs(start);
while(add != -1){
printf("%05d %d ", add, li[add].first);
if(li[add].second == -1) puts("-1");
else printf("%05d\n", li[add].second);
// cout << add << ' ' << li[add].first << ' ' << li[add].second << endl;
add = li[add].second;
}
}
int main() {
ios_base::sync_with_stdio(0);
cin.tie(0); cout.tie(0);
int tc = 1;
// cin >> tc;
for (int t = 1; t <= tc; t++) {
// cout << "Case #" << t << ": ";
solve();
}
}
标签:25,cout,int,1074,List,li,start,add,printf 来源: https://www.cnblogs.com/tomori/p/15862736.html