Submission #947490

#	Time	Username	Problem	Language	Result	Execution time	Memory
947490		vjudge306	Martian DNA (BOI18_dna)	C++14	100 / 100	302 ms	14580 KiB

dna

#include <bits/stdc++.h>
using namespace std;
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
#define ordered_set tree<int, null_type, less_equal<int>, rb_tree_tag, tree_order_statistics_node_update>
#define nn "\n"
#define x_x ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define intt int _; cin >> _; while (_--)
#define emp push_back
#define mod 1000000007
#define all(v) v.begin(), v.end()
#define ld long double
#define A first
#define B second
typedef long long ll;
const ld eps = 1e-27;
// diff between decimals 0.000000001 mt19937 mt(time(nullptr));

int main() {

    x_x
int n, k, r; cin>>n>>k>>r; map<int,int>mp,f;
int ar[n];
for(int i=0; i<n; i++)
cin>>ar[i];
int z=0;
for(int i=0, a,b; i<r;i++)
cin>>a>>b, mp[a]=b, z+=(b==0);

int sz=5+n;
for(int i=0, j=0; j<n||i<n;) {
while (z<r&&j<n) {
f[ar[j]]++; 
if (mp.find(ar[j])!=mp.end()&&f[ar[j]]==mp[ar[j]])z++;
j++;
}
if(z==r&&i<=j)sz=min(sz,j-i);
if(mp.find(ar[i])!=mp.end()&&f[ar[i]]==mp[ar[i]])
z-=1; 
f[ar[i]]-=1;  i++;
}
if(sz>n) cout<<"impossible"; else cout<<sz;

    return 0;
}

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