| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 61151 |
2018-07-25T09:03:58 Z |
Eae02 |
Boat (APIO16_boat) |
C++14 |
|
194 ms |
174544 KB |
#include <bits/stdc++.h>
uint64_t PRIME = 1000000007;
std::vector<std::pair<uint64_t, uint64_t>> schools;
std::unordered_map<uint64_t, uint64_t> memo[500];
uint64_t count(int i, uint64_t min)
{
if (i >= schools.size())
return 1;
auto mIt = memo[i].find(min);
if (mIt != memo[i].end())
return mIt->second;
uint64_t c = count(i + 1, min);
for (uint64_t n = std::max(schools[i].first, min == 0 ? 0 : (min + 1)); n <= schools[i].second; n++)
{
c = (c + count(i + 1, n)) % PRIME;
}
memo[i].insert(std::make_pair(min, c));
return c;
}
int64_t negMod(int64_t x)
{
int64_t r = x % PRIME;
return r < 0 ? (r + PRIME) : r;
}
int main()
{
int N;
std::cin >> N;
bool allSame = true;
uint64_t max2 = 0;
schools.resize(N);
for (int i = 0; i < N; i++)
{
std::cin >> schools[i].first;
std::cin >> schools[i].second;
if (schools[i].first != schools[i].second)
allSame = false;
max2 = std::max(max2, schools[i].second);
}
if (allSame)
{
std::cout << (count(0, 0) - 1) << std::endl;
}
else
{
std::vector<int64_t> waysElim(max2 + 1);
int64_t ways = 1;
for (int i = 0; i < N; i++)
{
const int64_t prevWays = ways;
const int64_t d = schools[i].second - schools[i].first + 1;
ways = (ways * ((d + 1) % PRIME)) % PRIME;
for (int64_t j = 0; j < d; j++)
{
int64_t eI = schools[i].second - j;
ways = negMod(ways - waysElim[eI]);
waysElim[eI] = negMod(((j + 1) % PRIME) * prevWays - waysElim[eI]);
}
}
std::cout << negMod(ways - 1) << std::endl;
}
}
Compilation message
boat.cpp: In function 'uint64_t count(int, uint64_t)':
boat.cpp:11:8: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
if (i >= schools.size())
~~^~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
54 ms |
6008 KB |
Output is correct |
| 2 |
Correct |
60 ms |
6008 KB |
Output is correct |
| 3 |
Correct |
68 ms |
6024 KB |
Output is correct |
| 4 |
Correct |
60 ms |
6024 KB |
Output is correct |
| 5 |
Correct |
65 ms |
6024 KB |
Output is correct |
| 6 |
Correct |
65 ms |
6024 KB |
Output is correct |
| 7 |
Correct |
75 ms |
6024 KB |
Output is correct |
| 8 |
Correct |
67 ms |
6024 KB |
Output is correct |
| 9 |
Correct |
58 ms |
6024 KB |
Output is correct |
| 10 |
Correct |
74 ms |
6024 KB |
Output is correct |
| 11 |
Correct |
72 ms |
6024 KB |
Output is correct |
| 12 |
Correct |
60 ms |
6148 KB |
Output is correct |
| 13 |
Correct |
59 ms |
6148 KB |
Output is correct |
| 14 |
Correct |
59 ms |
6148 KB |
Output is correct |
| 15 |
Correct |
64 ms |
6148 KB |
Output is correct |
| 16 |
Correct |
16 ms |
6148 KB |
Output is correct |
| 17 |
Correct |
15 ms |
6148 KB |
Output is correct |
| 18 |
Correct |
14 ms |
6148 KB |
Output is correct |
| 19 |
Correct |
15 ms |
6148 KB |
Output is correct |
| 20 |
Correct |
16 ms |
6148 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
54 ms |
6008 KB |
Output is correct |
| 2 |
Correct |
60 ms |
6008 KB |
Output is correct |
| 3 |
Correct |
68 ms |
6024 KB |
Output is correct |
| 4 |
Correct |
60 ms |
6024 KB |
Output is correct |
| 5 |
Correct |
65 ms |
6024 KB |
Output is correct |
| 6 |
Correct |
65 ms |
6024 KB |
Output is correct |
| 7 |
Correct |
75 ms |
6024 KB |
Output is correct |
| 8 |
Correct |
67 ms |
6024 KB |
Output is correct |
| 9 |
Correct |
58 ms |
6024 KB |
Output is correct |
| 10 |
Correct |
74 ms |
6024 KB |
Output is correct |
| 11 |
Correct |
72 ms |
6024 KB |
Output is correct |
| 12 |
Correct |
60 ms |
6148 KB |
Output is correct |
| 13 |
Correct |
59 ms |
6148 KB |
Output is correct |
| 14 |
Correct |
59 ms |
6148 KB |
Output is correct |
| 15 |
Correct |
64 ms |
6148 KB |
Output is correct |
| 16 |
Correct |
16 ms |
6148 KB |
Output is correct |
| 17 |
Correct |
15 ms |
6148 KB |
Output is correct |
| 18 |
Correct |
14 ms |
6148 KB |
Output is correct |
| 19 |
Correct |
15 ms |
6148 KB |
Output is correct |
| 20 |
Correct |
16 ms |
6148 KB |
Output is correct |
| 21 |
Incorrect |
194 ms |
174544 KB |
Output isn't correct |
| 22 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
5 ms |
174544 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
54 ms |
6008 KB |
Output is correct |
| 2 |
Correct |
60 ms |
6008 KB |
Output is correct |
| 3 |
Correct |
68 ms |
6024 KB |
Output is correct |
| 4 |
Correct |
60 ms |
6024 KB |
Output is correct |
| 5 |
Correct |
65 ms |
6024 KB |
Output is correct |
| 6 |
Correct |
65 ms |
6024 KB |
Output is correct |
| 7 |
Correct |
75 ms |
6024 KB |
Output is correct |
| 8 |
Correct |
67 ms |
6024 KB |
Output is correct |
| 9 |
Correct |
58 ms |
6024 KB |
Output is correct |
| 10 |
Correct |
74 ms |
6024 KB |
Output is correct |
| 11 |
Correct |
72 ms |
6024 KB |
Output is correct |
| 12 |
Correct |
60 ms |
6148 KB |
Output is correct |
| 13 |
Correct |
59 ms |
6148 KB |
Output is correct |
| 14 |
Correct |
59 ms |
6148 KB |
Output is correct |
| 15 |
Correct |
64 ms |
6148 KB |
Output is correct |
| 16 |
Correct |
16 ms |
6148 KB |
Output is correct |
| 17 |
Correct |
15 ms |
6148 KB |
Output is correct |
| 18 |
Correct |
14 ms |
6148 KB |
Output is correct |
| 19 |
Correct |
15 ms |
6148 KB |
Output is correct |
| 20 |
Correct |
16 ms |
6148 KB |
Output is correct |
| 21 |
Incorrect |
194 ms |
174544 KB |
Output isn't correct |
| 22 |
Halted |
0 ms |
0 KB |
- |
