# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
957663 | hariaakas646 | Calvinball championship (CEOI15_teams) | C++17 | 254 ms | 648 KiB |
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 scd(t) scanf("%d", &t)
#define sclld(t) scanf("%lld", &t)
#define forr(i, j, k) for (int i = j; i < k; i++)
#define frange(i, j) forr(i, 0, j)
#define all(cont) cont.begin(), cont.end()
#define mp make_pair
#define pb push_back
#define f first
#define s second
typedef long long int lli;
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<bool> vb;
typedef vector<lli> vll;
typedef vector<string> vs;
typedef vector<pii> vii;
typedef vector<vi> vvi;
typedef map<int, int> mpii;
typedef set<int> seti;
typedef multiset<int> mseti;
typedef long double ld;
void usaco()
{
freopen("/media/hariaakash646/785EF1075EF0BF46/CompetitiveProgramming/input.in", "r", stdin);
// freopen("problem.out", "w", stdout);
}
const lli mod = 1e9 + 7;
lli dpl[2][10010];
int main() {
// usaco();
int n;
scd(n);
vi vec(n+1);
frange(i, n) scd(vec[i+1]);
frange(i, n+1) {
dpl[0][i] = dpl[1][i] = 0;
}
forr(i, 1, n+1) {
forr(j, 1, n+1) {
dpl[1][j] = (dpl[0][j-1] + dpl[0][j] * j) % mod;
if(j < vec[i]) {
dpl[1][j]++;
dpl[1][j] %= mod;
}
}
forr(j, 0, n+1) dpl[0][j] = dpl[1][j];
}
lli tot = 0;
forr(i, 1, n+1) tot += dpl[0][i];
tot %= mod;
printf("%lld", tot+1);
}
Compilation message (stderr)
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