Submission #219596

#	Time	Username	Problem	Language	Result	Execution time	Memory
219596		thebes	Rope (JOI17_rope)	C++14	100 / 100	2497 ms	210168 KiB

rope

#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#pragma GCC target("sse,sse2,ssse3,sse3,sse4,popcnt,avx,mmx,abm,tune=native")
#include <bits/stdc++.h>
#define DEBUG 1
using namespace std;

namespace output{
    void __(short x){cout<<x;}
    void __(unsigned x){cout<<x;}
    void __(int x){cout<<x;}
    void __(long long x){cout<<x;}
    void __(unsigned long long x){cout<<x;}
    void __(double x){cout<<x;}
    void __(long double x){cout<<x;}
    void __(char x){cout<<x;}
    void __(const char*x){cout<<x;}
    void __(const string&x){cout<<x;}
    void __(bool x){cout<<(x?"true":"false");}
    template<class S,class T>
    void __(const pair<S,T>&x){__(DEBUG?"(":""),__(x.first),__(DEBUG?", ":" "),__(x.second),__(DEBUG?")":"");}
    template<class T>
    void __(const vector<T>&x){__(DEBUG?"{":"");bool _=0;for(const auto&v:x)__(_?DEBUG?", ":" ":""),__(v),_=1;__(DEBUG?"}":"");}
    template<class T>
    void __(const set<T>&x){__(DEBUG?"{":"");bool _=0;for(const auto&v:x)__(_?DEBUG?", ":" ":""),__(v),_=1;__(DEBUG?"}":"");}
    template<class T>
    void __(const multiset<T>&x){__(DEBUG?"{":"");bool _=0;for(const auto&v:x)__(_?DEBUG?", ":" ":""),__(v),_=1;__(DEBUG?"}":"");}
    template<class S,class T>
    void __(const map<S,T>&x){__(DEBUG?"{":"");bool _=0;for(const auto&v:x)__(_?DEBUG?", ":" ":""),__(v),_=1;__(DEBUG?"}":"");}
    void pr(){cout<<"\n";}
    template<class S,class... T>
    void pr(const S&a,const T&...b){__(a);if(sizeof...(b))__(' ');pr(b...);}
}

using namespace output;

typedef long long ll;
typedef long double ld;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef pair<int,char> pic;
typedef pair<double,double> pdd;
typedef pair<ld,ld> pld;
typedef vector<int> vi;
typedef vector<ll> vl;

#define pb push_back
#define fox(i,x,y) for(int i=(x);i<=(y);i++)
#define foxr(i,x,y) for(int i=(y);i>=(x);i--)

const int MN = 1e6+6;
int N, M, i, j, arr[MN], cnt[MN];
map<int,int> adj[MN][2]; map<int,int> mp;
inline void del(int x){
    if(!(--mp[x])) mp.erase(x);
}

int main(){
    for(scanf("%d%d",&N,&M),i=1;i<=N;i++){
        scanf("%d",&arr[i]);
        cnt[arr[i]]++;
    }
    for(i=1;i+1<=N;i+=2){
        if(arr[i]!=arr[i+1]){
            adj[arr[i]][0][arr[i+1]]++;
            adj[arr[i+1]][0][arr[i]]++;
        }
    }
    for(i=2;i+1<=N;i+=2){
        if(arr[i]!=arr[i+1]){
            adj[arr[i]][1][arr[i+1]]++;
            adj[arr[i+1]][1][arr[i]]++;
        }
    }
    for(i=1;i<=M;i++){
        mp[N-cnt[i]]++;
    }
    if(M==1){
        printf("0\n");
        return 0;
    }
    for(i=1;i<=M;i++){
        int ans = N;
        for(j=0;j<2;j++){
            del(N-cnt[i]);
            for(auto v : adj[i][j]){
                del(N-cnt[v.first]);
                mp[N-cnt[v.first]+v.second]++;
            }
            auto it = mp.begin();
            ans = min(ans,it->first-cnt[i]);
            for(auto v : adj[i][j]){
                del(N-cnt[v.first]+v.second);
                mp[N-cnt[v.first]]++;
            }
            mp[N-cnt[i]]++;
        }
        printf("%d\n",ans);
    }
    return 0;
}

Compilation message (stderr)

rope.cpp: In function 'int main()':
rope.cpp:59:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for(scanf("%d%d",&N,&M),i=1;i<=N;i++){
         ~~~~~~~~~~~~~~~~~~~^~~~
rope.cpp:60:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&arr[i]);
         ~~~~~^~~~~~~~~~~~~~

• Subtask 1: 15 / 15
• Subtask 2: 30 / 30
• Subtask 3: 10 / 10
• Subtask 4: 25 / 25
• Subtask 5: 20 / 20