#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#define fi first
#define se second
#define pii pair<int,int>
#define pll pair<long long,long long>
#define pb push_back
#define debug(x) cerr<<#x<<"="<<x<<endl
#define pq priority_queue
#define inf 1ll<<60
#define rep(i,a,b) for (ll i=a;i<(b);i++)
#define MP make_pair
#define SZ(x) (int(x.size()))
#define mod 1000000007
#define ALL(x) x.begin(),x.end()
#define endl "\n"
void inc(ll &a,ll b) {a=(a+b)%mod;}
void dec(ll &a,ll b) {a=(a-b+mod)%mod;}
int prod(ll a,ll b) {return ll(a)*ll(b)%mod;}
int lowbit(ll x) {return x&(-x);}
ll p0w(ll base,ll p) {ll ret=1;while(p>0){if (p%2ll==1ll) ret=ret*base%mod;base=base*base%mod;p/=2ll;}return ret;}
const ll maxn=222222;
ll a[maxn];
ll need[maxn];
vector<pll>tmp;
ll cnt[maxn];
ll bad[maxn];
ll n,k,r;
bool check(ll len){
if(len==n+1)return 0;
memset(cnt,0,sizeof cnt);
memset(bad,0,sizeof bad);
ll amt=0;
rep(i,1,len+1)cnt[a[i]]++;
rep(i,0,k){
if(cnt[i]<need[i]){
bad[i]=1;
amt++;
}
}
if(amt==0)return 1;
//cout<<endl;
//rep(i,0,k)cout<<i<<" "<<cnt[i]<<endl;
//rep(i,0,k)cout<<bad[i]<<" ";
//debug(amt);
rep(i,2,n+1-len){
//cout<<"-------------"<<endl;
cnt[a[i-1]]--;
if(cnt[a[i-1]]<need[a[i-1]] and !bad[a[i-1]]){//debug(11);
amt++;
bad[a[i-1]]=1;
}
cnt[a[i+len-1]]++;
if(cnt[a[i+len-1]]>=need[a[i+len-1]] and bad[a[i+len-1]]){//debug(22);
amt--;
bad[a[i+len-1]]=0;
}
//rep(i,0,k)cout<<i<<" "<<cnt[i]<<endl;
//rep(i,0,k)cout<<bad[i]<<" ";
//debug(amt);
if(amt==0){
//debug(i);
//debug(i+len);
return 1;
}
}
return 0;
}
int main(){
ios::sync_with_stdio(0);
cin.tie(0);
freopen("i.txt","r",stdin);
cin>>n>>k>>r;
rep(i,1,n+1)cin>>a[i];
rep(i,1,r+1){
ll x,y;cin>>x>>y;
tmp.pb(MP(x,y));
need[x]=y;
}
ll lo=1,hi=n+1;
//bsta the length
while(lo<hi){
ll mid=(lo+hi)>>1;
if(check(mid))hi=mid;
else lo=mid+1;
}
if(lo>n)cout<<"impossible"<<endl;
else cout<<lo<<endl;
return 0;
}
Compilation message
dna.cpp: In function 'int main()':
dna.cpp:77:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
77 | freopen("i.txt","r",stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
2 ms |
2396 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
2 ms |
2396 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
2 ms |
2648 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
2 ms |
2396 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
