#include <bits/stdc++.h>
using namespace std;
#define rep(i, a, b) for (int i = (a); i < (b); i++)
#define all(x) begin(x), end(x)
#define sz(x) int((x).size())
using ll = long long;
using pii = pair<int, int>;
using vi = vector<int>;
#ifdef LOCAL
auto operator<<(auto& o, auto x) -> decltype(x.first, o);
auto operator<<(auto& o, auto x) -> decltype(x.end(), o) {
o << "{";
for (int i = 0; auto y : x) o << ", " + !i++ * 2 << y;
return o << "}"; }
auto operator<<(auto& o, auto x) -> decltype(x.first, o) {
return o << "(" << x.first << ", " << x.second << ")"; }
void __print(auto... x) { ((cerr << x << " "), ...) << endl; }
#define debug(x...) __print("[" #x "]:", x)
#else
#define debug(...) 2137
#endif
const int nax = 1e5 + 10;
int v[nax], rt[nax];
int n;
bool check(int k) {
for(int i = 0; i <= n; i++) rt[i] = 0;
int cur = 0;
for(int i = 0; i < n; i++) {
cur -= rt[i];
if(cur > v[i]) return 0;
if(i > n - k && v[i] != cur) return 0;
rt[i + k] += v[i] - cur;
cur = v[i];
}
return 1;
}
int main() {
cin.tie(0)->sync_with_stdio(0);
cin >> n;
ll s = 0;
for(int i = 0; i < n; i++) {
cin >> v[i];
s += v[i];
}
ll ans = 1;
for(int i = 2; i <= n; i++) {
if(s % i == 0 && check(i)) ans = i;
}
cout << ans << endl;
}
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 | #include <bits/stdc++.h> using namespace std; #define rep(i, a, b) for (int i = (a); i < (b); i++) #define all(x) begin(x), end(x) #define sz(x) int((x).size()) using ll = long long; using pii = pair<int, int>; using vi = vector<int>; #ifdef LOCAL auto operator<<(auto& o, auto x) -> decltype(x.first, o); auto operator<<(auto& o, auto x) -> decltype(x.end(), o) { o << "{"; for (int i = 0; auto y : x) o << ", " + !i++ * 2 << y; return o << "}"; } auto operator<<(auto& o, auto x) -> decltype(x.first, o) { return o << "(" << x.first << ", " << x.second << ")"; } void __print(auto... x) { ((cerr << x << " "), ...) << endl; } #define debug(x...) __print("[" #x "]:", x) #else #define debug(...) 2137 #endif const int nax = 1e5 + 10; int v[nax], rt[nax]; int n; bool check(int k) { for(int i = 0; i <= n; i++) rt[i] = 0; int cur = 0; for(int i = 0; i < n; i++) { cur -= rt[i]; if(cur > v[i]) return 0; if(i > n - k && v[i] != cur) return 0; rt[i + k] += v[i] - cur; cur = v[i]; } return 1; } int main() { cin.tie(0)->sync_with_stdio(0); cin >> n; ll s = 0; for(int i = 0; i < n; i++) { cin >> v[i]; s += v[i]; } ll ans = 1; for(int i = 2; i <= n; i++) { if(s % i == 0 && check(i)) ans = i; } cout << ans << endl; } |
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