제출 #893356

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
893356		vjudge1	Road Construction (JOI21_road_construction)	C++17	5 / 100	543 ms	48068 KiB

road_construction

#include <bits/stdc++.h>
#define ll long long
#define str string
#define ins insert
#define ld long double
#define pb push_back
#define pf push_front
#define pof pop_front()
#define pob pop_back()
#define lb lower_bound
#define ub upper_bound
#define endl "\n"
#define fr first
#define sc second
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define sz size()
#define vll vector<ll>
#define bc back()
#define arr array
using namespace std;
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
template <class _T>
bool chmin(_T &x, const _T &y){
    bool flag=false;
    if(x>y) x=y;flag|=true;
    return flag;
}
template <class _T>
bool chmax(_T &x, const _T &y){
    bool flag=false;
    if (x<y) x=y;flag|=true;
    return flag;
}
#define ordered_set tree<ll, null_type,less_equal<ll>, rb_tree_tag,tree_order_statistics_node_update>
void fre(string s){freopen((s+".in").c_str(),"r",stdin);freopen((s+".out").c_str(),"w",stdout);}
void start(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
}
const ll inf=1e9+7;
const ll mod=1e9+7;
const ll N=3e3+5;
const ld eps=1e-9;
vll x,y;
ll dis(ll i,ll j){
    return abs(x[i]-x[j])+abs(y[i]-y[j]);
}
void solve(){
	ll i,j;
	ll n,k;
    cin>>n>>k;
    x.resize(n);
    y.resize(n);
    bool flag=true;
    for(i=0;i<n;i++) {
        cin>>x[i]>>y[i];
        if(y[i])flag=false;
    }
    if(n<=1000){
        vll v;
        for(i=0;i<n;i++){
            for(j=i+1;j<n;j++){
                v.pb(dis(i,j));
            }
        }
        sort(all(v));
        for(i=0;i<k;i++) cout<<v[i]<<endl;
        return;
    }
    if(flag){
        vector<pair<ll,ll>> v;
        for(i=0;i<n;i++){
            v.pb({x[i],y[i]});
        }
        sort(all(v));
        map<pair<ll,ll>,ll> mp;
        set<pair<ll,pair<ll,ll>>> seg;
        for(i=1;i<n;i++){
            seg.ins({dis(i,i-1),{i-1,i}});
        }
        for(i=0;i<k;i++){
            ll x=(seg.begin()->sc).fr,y=(seg.begin()->sc).sc;
            cout<<dis(x,y)<<endl;
            seg.erase(seg.begin());
            if(x>0 && mp[{x-1,y}]==0){
                mp[{x-1,y}]++;
                seg.ins({dis(x-1,y),{x-1,y}});
            }
            if(y<n-1 && mp[{x,y+1}]){
                mp[{x,y+1}]++;
                seg.ins({dis(x,y+1),{x,y+1}});
            }
        }
    }
}
signed main(){
	start();
    ll t=1;
	//cin>>t;
    while(t--) solve();
    return 0;
}
/*






*/

컴파일 시 표준 에러 (stderr) 메시지

road_construction.cpp: In function 'bool chmin(_T&, const _T&)':
road_construction.cpp:28:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   28 |     if(x>y) x=y;flag|=true;
      |     ^~
road_construction.cpp:28:17: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   28 |     if(x>y) x=y;flag|=true;
      |                 ^~~~
road_construction.cpp: In function 'bool chmax(_T&, const _T&)':
road_construction.cpp:34:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   34 |     if (x<y) x=y;flag|=true;
      |     ^~
road_construction.cpp:34:18: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   34 |     if (x<y) x=y;flag|=true;
      |                  ^~~~
road_construction.cpp: In function 'void fre(std::string)':
road_construction.cpp:38:27: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 | void fre(string s){freopen((s+".in").c_str(),"r",stdin);freopen((s+".out").c_str(),"w",stdout);}
      |                    ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
road_construction.cpp:38:64: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 | void fre(string s){freopen((s+".in").c_str(),"r",stdin);freopen((s+".out").c_str(),"w",stdout);}
      |                                                         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 0 / 6
• Subtask 3: 0 / 7
• Subtask 4: 0 / 20
• Subtask 5: 0 / 27
• Subtask 6: 0 / 35