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 fi first
#define se second
#define pb push_back
#define mp make_pair
typedef pair<int, int> ii;
const int mod = 1e9 + 7;
const int inf = 1e9;
int add(int x, int y) {
return (1ll * x + 1ll * y) % mod;
}
int del(int x, int y) {
return ((1ll * x - 1ll * y) % mod + mod) % mod;
}
int mul(int x, int y) {
return (1ll * x * 1ll * y) % mod;
}
const int N = 1e7 + 5;
int dp[2 * N];
bool used[N];
vector<int> vec[N];
int bit[2 * N];
void update(int x, int val) {
while(x > 0) {
bit[x] = min(bit[x], val);
x -= x & (-x);
}
}
int get(int x) {
if(x == 0) return 0;
int val = inf;
while(x < N) {
val = min(val, bit[x]);
x += x & (-x);
}
return val;
}
int m, q;
int main() {
cin.tie(0), ios_base::sync_with_stdio(0);
cin >> m >> q;
for(int i = 1; i <= m; i++) {
int x;
cin >> x;
if(used[x]) continue;
used[x] = 1;
for(int l = 0; l < N; l++) {
if(x * l >= N) break;
vec[x * l].pb(x);
}
}
for(int i = 1; i <= N - 5; i++)
bit[i] = dp[i] = inf;
for(int i = 0; i <= N - 5; i++) {
dp[i] = get(i);
for(int j = 0; j < vec[i].size(); j++)
update(i + vec[i][j] - 1, min(inf, dp[i] + 1));
vec[i].clear();
}
for(int i = 1; i <= q; i++) {
int x;
cin >> x;
if(dp[x] == inf)
cout << "oo\n";
else
cout << dp[x] << "\n";
}
}
Compilation message (stderr)
brunhilda.cpp: In function 'int main()':
brunhilda.cpp:71:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int j = 0; j < vec[i].size(); j++)
~~^~~~~~~~~~~~~~~
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