Submission #31668

#	Time	Username	Problem	Language	Result	Execution time	Memory
31668		long10024070	Relativnost (COCI15_relativnost)	C++11	140 / 140	2569 ms	18300 KiB

relativnost

#include <cstdio>
#include <cstring>
#include <vector>
#include <algorithm>

using namespace std;

typedef unsigned int uint;

const int MAXN = 100005;
const int MAXC = 21;
const int mod = 10007;

int n, c, q;
int a[MAXN];
int b[MAXN];
int T[2 * MAXN][MAXC];

void update(int x) {
  for (int i = 0; i <= c; ++i) T[x][i] = 0;

  for (int i = 0; i <= c; ++i)
    for (int j = 0; j <= c; ++j)
      T[x][min(i + j, c)] += (T[x * 2][i] * T[x * 2 + 1][j]) % mod;

  for (int i = 0; i <= c; ++i) T[x][i] %= mod;
}

void change(int x) {
  x += n;
  memset(T[x], 0, sizeof T[x]);
  T[x][1] = a[x - n] % mod;
  T[x][0] = b[x - n] % mod;

  for (x /= 2; x > 0; x /= 2) update(x);
}

int main(void) {
  scanf("%d%d", &n, &c);
  for (int i = 0; i < n; ++i) scanf("%d", &a[i]);
  for (int i = 0; i < n; ++i) scanf("%d", &b[i]);
  for (int i = 0; i < n; ++i) {
    T[i + n][0] = b[i] % mod;
    T[i + n][1] = a[i] % mod;
  }

  for (int i = n-1; i >= 1; --i)
    update(i);

  scanf("%d", &q);
  for (int i = 0; i < q; ++i) {
    int p;
    scanf("%d", &p); --p;
    scanf("%d%d", &a[p], &b[p]); 
    change(p);
    printf("%d\n", T[1][c]);
  }

  return 0;
}

Compilation message (stderr)

relativnost.cpp: In function 'int main()':
relativnost.cpp:39:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", &n, &c);
                        ^
relativnost.cpp:40:49: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   for (int i = 0; i < n; ++i) scanf("%d", &a[i]);
                                                 ^
relativnost.cpp:41:49: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   for (int i = 0; i < n; ++i) scanf("%d", &b[i]);
                                                 ^
relativnost.cpp:50:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &q);
                  ^
relativnost.cpp:53:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &p); --p;
                    ^
relativnost.cpp:54:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &a[p], &b[p]); 
                                ^

• Subtask 1: 140 / 140