Submission #731663

#	Time	Username	Problem	Language	Result	Execution time	Memory
731663		shadow_sami	Martian DNA (BOI18_dna)	C++17	0 / 100	2 ms	340 KiB

dna

#include<bits/stdc++.h>
#include<ext/pb_ds/assoc_container.hpp>
#include<ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
using namespace std;
typedef long long int ll;
typedef vector<ll> vi;
typedef pair<ll,ll> pi;
#define ff first
#define ss second
#define all(a) a.begin(),a.end()
#define fip(a,b) for(ll i = a; i < b ; i++)
#define fjp(a,b) for(ll j = a; j < b ; j++)
#define fp(k,a,b) for(ll k = a; k < b ; k++)
#define fin(a,b) for(ll i = a; i >= b ; i--)
#define fjn(a,b) for(ll i = a; j >= b ; j--)
#define fn(k,a,b) for(ll k = a; k >= b ; k--)
#define fx(a) fx(auto x : a)
#define ordered_set tree<pi,null_type,less<pi>,rb_tree_tag,tree_order_statistics_node_update>
#define total_one(k) __builtin_popcount(k)
#define back_zero(k) __builtin_ctzll(k)
#define front_zero(k) __builtin_clzll(k)
#define nli "\n"

ll n,m,ans,sum,res,cnt,tptp,tp,tp2,q;

const ll mx = 2e5 + 5;
const ll mod = 1e9 + 7;

ll a[mx];
unordered_map<ll,ll> mp,mp2;
ll st,st2;

int main(){
	ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
	// #ifdef code
		freopen("input1.txt","r",stdin);
		freopen("output1.txt","w",stdout);
		freopen("error1.txt","w",stderr);
	// #endif

		cin>>n>>m>>q;
		fip(1,n+1){
			cin>>a[i];
		}
		fip(0,q){
			cin>>tp>>tp2;
			mp[tp] = tp2;
			st++;
		}
		ans = 1e9;
		fip(1,n+1){
			mp2.clear();
			st2 = 0;
			fjp(i,n+1){
				mp2[a[j]]++;
				if(mp.count(a[j]))
					if(mp[a[j]]==mp2[a[j]])
						st2++;
				if(st2==st)
					ans = min(ans,j-i+1);
			}
		}
		if(ans==1e9){
			cout<<"impossible";
			return 0;
		}
		cout<<ans<<nli;

	cerr << "Time elapsed : " << setprecision(6) << 100.00 * clock() / CLOCKS_PER_SEC << "ms\n";
}

Compilation message (stderr)

dna.cpp: In function 'int main()':
dna.cpp:37:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |   freopen("input1.txt","r",stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
dna.cpp:38:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 |   freopen("output1.txt","w",stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
dna.cpp:39:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   39 |   freopen("error1.txt","w",stderr);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 16
• Subtask 2: 0 / 24
• Subtask 3: 0 / 28
• Subtask 4: 0 / 32