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>
#include<ext/pb_ds/assoc_container.hpp>
#include<ext/pb_ds/tree_policy.hpp>
#define ll long long
#define ld long double
#define vl vector<ll>
#define vi vector<int>
#define pii pair<int, int>
#define pll pair<ll, ll>
#define all(v) v.begin(), v.end()
#define pb push_back
#define f first
#define s second
using namespace std;
using namespace __gnu_pbds;
typedef tree<ll, null_type, less<ll>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;
const ll sz = 15;
map<ll, ll>mp[sz];
int main()
{
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
ll tests = 1;
//cin >> tests;
while(tests--)
{
ll n, k, r, i, j, ans = LLONG_MAX;
cin >> n >> k >> r;
ll a[n+5];
for(i = 1; i <= n; i++)
cin >> a[i];
map<ll, ll>q;
vl v;
for(i = 1; i <= r; i++)
{
ll x, y;
cin >> x >> y;
q[x] = y;
v.pb(x);
}
for(i = 1; i <= n; i++)
{
for(auto u : v){
mp[u][i] = mp[u][i-1];
if(u == a[i])
mp[u][i]++;
}
}
for(i = 1; i <= n; i++)
{
ll l = i, r = n;
while(l <= r)
{
ll mid = (l + r) / 2;
bool possible = true;
for(auto u : v)
{
ll cnt = mp[u][mid] - mp[u][i-1];
if(cnt < q[u])
{
possible = false;
break;
}
}
if(!possible)
l = mid + 1;
else{
r = mid - 1;
ans = min(ans, mid - i + 1);
}
}
}
if(ans == LLONG_MAX)
cout << "impossible\n";
else
cout << ans << "\n";
}
}
Compilation message (stderr)
dna.cpp: In function 'int main()':
dna.cpp:28:24: warning: unused variable 'j' [-Wunused-variable]
28 | ll n, k, r, i, j, ans = LLONG_MAX;
| ^
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