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P3131 [USACO16JAN] Subsequences Summing to Sevens S

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R40246968
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Baoshuo Ren 2020-10-21 21:27:03 +08:00 committed by Baoshuo Ren
parent 204eb6c70a
commit 9ee5e67514
Signed by: baoshuo
GPG Key ID: 70F90A673FB1AB68
1 changed files with 24 additions and 0 deletions
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problem/P3131/P3131.cpp Normal file
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#include <bits/stdc++.h>
using namespace std;
long long a[50005];
int main() {
int n, k;
cin >> n;
for (int i = 1; i <= n; i++) {
cin >> k;
a[i] = a[i - 1] + k;
}
for (int i = n; i > 0; i--) {
for (int j = 1; j + i <= n; j++) {
if ((a[i + j] - a[j]) % 7 == 0) {
cout << i << endl;
return 0;
}
}
}
cout << 0 << endl;
return 0;
}