Submission #419857

#	Time	Username	Problem	Language	Result	Execution time	Memory
419857		acm	Relativnost (COCI15_relativnost)	C++14	42 / 140	4069 ms	11964 KiB

relativnost

#include <bits/stdc++.h>
#define speed                   \
  ios_base::sync_with_stdio(0); \
  cin.tie(0);                   \
  cout.tie(0);
#define precision     \
  cout.precision(30); \
  cerr.precision(10);
#define ll long long
#define ld long double
#define pll pair<ll, ll>
#define pii pair<int, int>
#define forn(n) for (int i = 1; i <= n; i++)
#define forlr(l, r) for (int i = l; i != r; (l > r ? i-- : i++))
#define pb(x) push_back(x)
#define sz(x) (int)x.size()
#define mp(x, y) make_pair(x, y)
#define all(x) x.begin(), x.end()
#define pc(x) __builtin_popcount(x)
#define pcll(x) __builtin_popcountll(x)
#define F first
#define S second
using namespace std;
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
void ioi(string name) {
  freopen((name + ".in").c_str(), "r", stdin);
  freopen((name + ".out").c_str(), "w", stdout);
}
const int mod = 10007;
int n, c, q, a[100005], b[100005], dp[100005][25];
int main() {
  speed;
  precision;
  // code
  cin >> n >> c;
  for (int i = 1; i <= n; i++) {
    cin >> a[i];
  }
  for (int i = 1; i <= n; i++) {
    cin >> b[i];
  }
  dp[0][0] = 1;
  for (int i = 1; i <= n; i++) {
    for (int j = 0; j <= c; j++) {
      dp[i][j] = (dp[i - 1][max(j - 1, 0)] * a[i]) % mod;
      dp[i][j] += (dp[i - 1][j] * b[i]) % mod;
      if (mod <= dp[i][j]) dp[i][j] -= mod;
    }
  }
  cin >> q;
  while (q--) {
    int x, y, z;
    cin >> x >> y >> z;
    a[x] = y;
    b[x] = z;
    for (int i = x; i <= n; i++) {
      for (int j = 0; j <= c; j++) {
        dp[i][j] = (dp[i - 1][max(j - 1, 0)] * a[i]) % mod;
        dp[i][j] += (dp[i - 1][j] * b[i]) % mod;
        if (mod <= dp[i][j]) dp[i][j] -= mod;
      }
    }
    cout << dp[n][c] << "\n";
  }
  // endl
#ifndef ONLINE_JUDGE
  cerr << "\nTime elapsed: " << 1.0 * clock() / CLOCKS_PER_SEC << " s.\n";
#endif
  return 0;
}

Compilation message (stderr)

relativnost.cpp: In function 'void ioi(std::string)':
relativnost.cpp:26:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   26 |   freopen((name + ".in").c_str(), "r", stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
relativnost.cpp:27:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   27 |   freopen((name + ".out").c_str(), "w", stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 42 / 140