This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
using namespace std;
#define ll long long
ll INF=1e9,LINF=1e18,MOD=1e9+7;
#define fi first
#define se second
#define pii pair<int,int>
#define mid ((l+r)/2)
#define sz(a) (int((a).size()))
#define all(a) a.begin(),a.end()
#define endl "\n"
#define PRINT(x) cerr<<#x<<'-'<<x<<endl<<flush;
#define pb push_back
#define PRINTvec(x) { cerr<<#x<<"-"; for(auto h:x) cerr<<h<<" "; cerr<<endl; }
void Solve(){
int N,K,R; cin>>N>>K>>R;
vector<int> D(N+1);
for(int i=1;i<=N;i++) cin>>D[i];
vector<int> treba(K,0);
for(int i=1;i<=R;i++){
int x,y; cin>>x>>y;
treba[x]=y;
}
vector<int> kolko(K,0);
int i=1,j=1; kolko[D[1]]++;
int aktivnih_dovoljno=0;
for(int i=0;i<K;i++){
if(kolko[i]>=treba[i]) aktivnih_dovoljno++;
}
int res=INF;
while(i<=j){
if(aktivnih_dovoljno==K){
res=min(res,j-i+1);
int levi=D[i];
i++;
if(i>j) break;
int staro_kolko=kolko[levi],novo_kolko=--kolko[levi];
if(staro_kolko>=treba[levi] && novo_kolko<treba[levi]){
aktivnih_dovoljno--;
}
}
else if(j==N){
int levi=D[i];
i++;
if(i>j) break;
int staro_kolko=kolko[levi],novo_kolko=--kolko[levi];
if(staro_kolko>=treba[levi] && novo_kolko<treba[levi]){
aktivnih_dovoljno--;
}
}
else{
j++;
if(i>j) break;
int desni=D[j];
int staro_kolko=kolko[desni],novo_kolko=++kolko[desni];
if(staro_kolko<treba[desni] && novo_kolko>=treba[desni]){
aktivnih_dovoljno++;
}
}
}
cout<<(res!=INF ? to_string(res) : "impossible")<<endl;
}
int main(){
ios::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
int t; t=1;
//cin>>t;
while(t--){
Solve();
}
return 0;
}
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |