Task: | Torni |
Sender: | Olli |
Submission time: | 2020-09-26 14:29:08 +0300 |
Language: | C++ (C++11) |
Status: | READY |
Result: | 100 |
group | verdict | score |
---|---|---|
#1 | ACCEPTED | 15 |
#2 | ACCEPTED | 41 |
#3 | ACCEPTED | 44 |
test | verdict | time | group | |
---|---|---|---|---|
#1 | ACCEPTED | 0.04 s | 1, 2, 3 | details |
#2 | ACCEPTED | 0.04 s | 2, 3 | details |
#3 | ACCEPTED | 0.04 s | 3 | details |
Code
#include <iostream>#include <vector>#include <algorithm>using namespace std;typedef long long ll;const int M = 1e9 + 7;const int N = 1e6 + 5;ll ans[N];ll s[N];ll po[N];ll s2[N];int main() {po[0] = 1;po[1] = 1;for(int i = 2; i < N; ++i) {po[i] = 4*po[i-1];po[i] %= M;}ans[0] = 1;s[0] = 1;for(int i = 1; i < N; ++i) {if(i <= 3) {for(int j = 1; j < i; ++j) {s2[i] += po[j]*s[i-j-1];s2[i] %= M;}} else {s2[i] = s2[i-1]*4;s2[i] %= M;s2[i] += s[i-2];s2[i] %= M;}ans[i] = s[i-1] + s2[i] + po[i];ans[i] %= M;s[i] = s[i-1] + ans[i];s[i] %= M;}int t;cin >> t;for(int i = 1; i <= t; ++i) {int n;cin >> n;cout << ans[n] << "\n";}}
Test details
Test 1
Group: 1, 2, 3
Verdict: ACCEPTED
input |
---|
10 1 2 3 4 ... |
correct output |
---|
2 8 34 148 650 ... |
user output |
---|
2 8 34 148 650 ... |
Test 2
Group: 2, 3
Verdict: ACCEPTED
input |
---|
100 1 2 3 4 ... |
correct output |
---|
2 8 34 148 650 ... |
user output |
---|
2 8 34 148 650 ... Truncated |
Test 3
Group: 3
Verdict: ACCEPTED
input |
---|
100 996306 650655 896240 821967 ... |
correct output |
---|
87350005 606189151 122595036 193572715 227926807 ... |
user output |
---|
87350005 606189151 122595036 193572715 227926807 ... Truncated |