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QOJ
ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
---|---|---|---|---|---|---|---|---|---|
#719400 | #4740. Plan metra | nathan4690 | 0 | 0ms | 0kb | C++17 | 3.0kb | 2024-11-07 00:40:08 | 2024-11-07 00:40:11 |
answer
#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define el cout << '\n'
#define f1(i,n) for(int i=1;i<=n;i++)
#define __file_name ""
using namespace std;
const ll maxn = 4e6+5, inf=1e18;
struct Edge{
int u, v, w;
Edge(){};
Edge(int u, int v, int w): u(u), v(v), w(w){};
};
int n,d[maxn], l[maxn];
vector<int> mp[2*maxn], allv;
vector<Edge> ans;
bool cmp(int x, int y){
return d[x] < d[y];
}
bool solve(int duv){
for(int item: allv){
mp[item + maxn].clear();
}
allv.clear();
ans.clear();
for(int i=2;i<n;i++){
int diff = d[i] - l[i];
if(mp[diff + maxn].empty()) allv.push_back(diff);
mp[diff + maxn].push_back(i);
}
// int duv = 1e9;
// for(int i=2;i<n;i++) duv = min(duv, d[i] + l[i]);
// if(abs(*allv.begin()) == abs(*allv.rbegin()) && allv.size() <= 2) duv = abs(*allv.begin());
if(mp[duv+maxn].empty()) allv.push_back(duv);
if(mp[-duv+maxn].empty()) allv.push_back(-duv);
mp[-duv+maxn].push_back(1); l[1] = duv;
mp[duv+maxn].push_back(n); d[n] = duv;
int rem2 = allv[0] & 1;
for(int item: allv) {
if((item & 1) != rem2) return false;
sort(mp[item + maxn].begin(), mp[item + maxn].end(), cmp);
}
sort(allv.begin(), allv.end());
int pre = 1, dst = 0;
for(int item: allv){
int u = mp[item + maxn][0];
// cout << item << ' ' << u << ' ' << d[u] << ' ' << dst << endl;
// for(Edge e: ans){
// cout << e.u << ' ' << e.v << ' ' << e.w << '\n';
// }
if(u > 1){
if(dst >= d[u]) return false;
ans.push_back(Edge(pre, u, d[u] - dst));
dst = d[u];
if(duv - dst != l[u]) return false;
pre = u;
}
if(dst > duv) return false;
// int dst2 = dst;
for(int i=1;i<mp[item+maxn].size();i++){
int v = mp[item+maxn][i];
if(d[v] <= dst) return false;
ans.push_back(Edge(u, v, d[v] - dst));
if(duv - dst + (d[v] - dst) != l[v]) return false;
}
}
cout << "TAK\n";
for(Edge e: ans){
cout << e.u << ' ' << e.v << ' ' << e.w << '\n';
}
return true;
}
int main(){
ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
if(fopen(__file_name ".inp", "r")){
freopen(__file_name ".inp","r",stdin);
freopen(__file_name ".out","w",stdout);
}
// code here
cin >> n;
if(n == 2){
cout << "TAK\n1 2 1\n";
return 0;
}
for(int i=2;i<n;i++) cin >> d[i];
for(int i=2;i<n;i++) cin >> l[i];
for(int i=2;i<n;i++){
int diff = d[i] - l[i];
if(mp[diff + maxn].empty()) allv.push_back(diff);
mp[diff + maxn].push_back(i);
}
sort(allv.begin(), allv.end());
int duv = 1e9, duv2 = 1;
for(int i=2;i<n;i++) duv = min(duv, d[i] + l[i]);
duv2 = abs(*allv.begin());
if(solve(duv)) return 0;
if(solve(duv2)) return 0;
cout << "NIE\n";
return 0;
}
详细
Subtask #1:
score: 0
Memory Limit Exceeded
Test #1:
score: 0
Memory Limit Exceeded
input:
7 6 6 2 2 1 5 3 5 1 4
output:
result:
Subtask #2:
score: 0
Skipped
Dependency #1:
0%
Subtask #3:
score: 0
Skipped
Dependency #1:
0%
Subtask #4:
score: 0
Skipped
Dependency #1:
0%
Subtask #5:
score: 0
Skipped
Dependency #1:
0%