oj.uz

Submission #204994

# Submission time Handle Problem Language Result Execution time Memory
204994 2020-02-27T16:33:01 Z Haunted_Cpp Shell (info1cup18_shell) C++17
55 / 100
 1000 ms 18968 KB 
#include <iostream>
#include <vector>
#include <map>
#include <set>
#include <stack>
#include <algorithm>
#include <cstring>
#include <cassert>
#include <bitset>
using namespace std;
 
#define FOR(i, a, b) for (int i = a; i < (int) b; i++)
#define F0R(i, a) FOR(i, 0, a)
#define ROF(i, a, b) for (int i = a; i >= (int) b; i--)
#define R0F(i, a) ROF(i, a, 0)
#define GO(i, a) for (auto i : a)
 
#define f first
#define s second
#define eb emplace_back
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
 
typedef vector<int> vi;
typedef pair<int, int> pii;
typedef vector<pii> vpii;
typedef vector<vi> vvi;
typedef vector<vpii> vvpii;
typedef long long i64;
typedef vector<i64> vi64;
 
const int dr[] = {+1, -1, +0, +0, +1, -1, +1, -1};
const int dc[] = {+0, +0, +1, -1, +1, -1, -1, +1};
const int ms[] = {+31, +29, +31, 30, +31, +30, +31, +31, +30, +31, +30, +31};

void setIO(string nome) {
  ios_base::sync_with_stdio(0); cin.tie(0);
  freopen ((nome + ".in").c_str(), "r", stdin);
  freopen ((nome + ".out").c_str(), "w", stdout);
}

const int N = 2e3 + 5;
const int M = 2e3 + 5;
const int MOD = 1e9 + 7;

int n, m, k, streak [N];
int dp [N][M];
vvi g (N);

void add (int &a, int b) {
  a += b;
  while (a >= MOD) a -= MOD;
}

int solve (int node, int match) {
  if (node == n - 1) return (match == k);
  int &res = dp[node][match];
  if (~res) return res;
  res = 0;
  int target = (match < k ? streak[match] : -1); 
  GO (to, g[node]) add (res, solve (to, match + (to == target)));
  return res;
} 

int main () {
  ios_base::sync_with_stdio(0); 
  cin.tie(0);
  cin >> n >> m >> k;
  assert (n < N);
  memset (dp, -1, sizeof(dp));
  F0R (i, k) {
    cin >> streak[i];
    --streak[i];
  }
  F0R (i, m) {
    int st, et;
    cin >> st >> et;
    --st; --et;
    g[st].eb(et);
  } 
  cout << solve (0, streak[0] == 0 ? 1 : 0) << '\n';
  return 0;
}

Compilation message

shell.cpp: In function 'void setIO(std::__cxx11::string)':
shell.cpp:39:11: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   freopen ((nome + ".in").c_str(), "r", stdin);
   ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
shell.cpp:40:11: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   freopen ((nome + ".out").c_str(), "w", stdout);
   ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 16120 KB Output is correct
2 Correct 15 ms 16120 KB Output is correct
3 Correct 14 ms 16120 KB Output is correct
4 Correct 14 ms 16120 KB Output is correct
5 Correct 14 ms 16120 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 16120 KB Output is correct
2 Correct 15 ms 16120 KB Output is correct
3 Correct 14 ms 16120 KB Output is correct
4 Correct 14 ms 16120 KB Output is correct
5 Correct 14 ms 16120 KB Output is correct
6 Correct 14 ms 16120 KB Output is correct
7 Correct 50 ms 16376 KB Output is correct
8 Correct 47 ms 16352 KB Output is correct
9 Correct 20 ms 16376 KB Output is correct
10 Correct 25 ms 16248 KB Output is correct

Subtask #3
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 16120 KB Output is correct
2 Execution timed out 1018 ms 18968 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #4
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 16120 KB Output is correct
2 Correct 15 ms 16120 KB Output is correct
3 Correct 14 ms 16120 KB Output is correct
4 Correct 14 ms 16120 KB Output is correct
5 Correct 14 ms 16120 KB Output is correct
6 Correct 14 ms 16120 KB Output is correct
7 Correct 50 ms 16376 KB Output is correct
8 Correct 47 ms 16352 KB Output is correct
9 Correct 20 ms 16376 KB Output is correct
10 Correct 25 ms 16248 KB Output is correct
11 Correct 16 ms 16120 KB Output is correct
12 Execution timed out 1018 ms 18968 KB Time limit exceeded
13 Halted 0 ms 0 KB -