Submission #957278

#	Time	Username	Problem	Language	Result	Execution time	Memory
957278		Nika533	Rope (JOI17_rope)	C++14	80 / 100	2527 ms	91160 KiB

rope

#pragma gcc diagnostic "-std=c++1z"
#include <bits/stdc++.h>
#define int long long
#define pb push_back
#define f first
#define s second
#define MOD 1000000007
#define pii pair<int,int>
#define all(x) (x).begin(),(x).end()
#define allr(x) (x).rbegin(),(x).rend()
using namespace std;
const int N=1e6+5;
int n,m,T,k,arr[N],ans[N];
int t[N*4];
vector<int> pos[N];
void build(int v, int tl, int tr) {
     if (tl==tr) {
          t[v]=pos[tl].size();
          return;
     }
     int mid=(tl+tr)/2;
     build(v*2,tl,mid); build(v*2+1,mid+1,tr);
     t[v]=max(t[v*2],t[v*2+1]);
}
void update(int v, int tl, int tr, int ind, int val) {
     if (ind<tl || ind>tr) return;
     if (tl==tr) {
          t[v]+=val;
          return;
     }
     int mid=(tl+tr)/2;
     update(v*2,tl,mid,ind,val); update(v*2+1,mid+1,tr,ind,val);
     t[v]=max(t[v*2],t[v*2+1]);
}
void solve(int st) {
     for (int i=1; i<=m; i++) {
          int freq=pos[i].size();
          vector<int> p;
          for (int oo=0; oo<pos[i].size(); oo++) {
               int j=pos[i][oo];
               int o;
               if ((st+j)%2) o=j-1;
               else o=j+1;
               if (arr[o]!=0 && arr[o]!=i) p.pb(arr[o]);
          }
          for (auto x:p) update(1,1,m,x,-1);
          update(1,1,m,i,-freq);
          int mx=t[1];
          ans[i]=min(ans[i],n-mx-freq);
          for (auto x:p) update(1,1,m,x,1);
          update(1,1,m,i,freq);
     }
}
void test_case() {
     cin>>n>>m;
     for (int i=1; i<=n; i++) {
          cin>>arr[i];
          pos[arr[i]].pb(i);
     }
     build(1,1,m);
     for (int i=1; i<=m; i++) ans[i]=1e9;
     solve(0); solve(1);
     for (int i=1; i<=m; i++) cout<<ans[i]<<endl;
}
main () {
	ios :: sync_with_stdio(0);
	cin.tie(0); cout.tie(0);
	T=1; 
	while (T--) test_case();
}

Compilation message (stderr)

rope.cpp:1: warning: ignoring '#pragma gcc diagnostic' [-Wunknown-pragmas]
    1 | #pragma gcc diagnostic "-std=c++1z"
      | 
rope.cpp: In function 'void solve(long long int)':
rope.cpp:39:28: 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]
   39 |           for (int oo=0; oo<pos[i].size(); oo++) {
      |                          ~~^~~~~~~~~~~~~~
rope.cpp: At global scope:
rope.cpp:65:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   65 | main () {
      | ^~~~

• Subtask 1: 15 / 15
• Subtask 2: 30 / 30
• Subtask 3: 10 / 10
• Subtask 4: 25 / 25
• Subtask 5: 0 / 20