Submission #94120

#	Time	Username	Problem	Language	Result	Execution time	Memory
94120		Kastanda	Tug of War (BOI15_tug)	C++11	18 / 100	104 ms	6520 KiB

tug

#include<bits/stdc++.h>
#define pb push_back
using namespace std;
const int N = 30004, MXN = N * 20;
int n, k, L[N], R[N], A[N], C[MXN];
bool M[N * 2];
set < int > Adj[N * 2];
bitset < MXN > B;
int Brute()
{
    int nn = n + n;
    vector < int > T[30];
    for (int i = 0; i < (1 << nn); i++)
    {
        for (int j = 1; j <= nn; j++)
            T[j].clear();
        for (int j = 0; j < nn; j++)
        {
            int id = j + 1;
            if (i >> j & 1)
            {
                T[L[id]].push_back(id);
            }
            else
            {
                T[R[id]].push_back(id);
            }
        }
        int sum = 0, fail = 0;
        for (int j = 1; j <= n + n; j++)
        {
            if (T[j].size() != 1)
                {fail = 1; break;}

            if (j <= n)
                sum += A[T[j][0]];
            else
                sum -= A[T[j][0]];
        }
        if (fail == 0 && abs(sum) <= k)
            return 1;
    }
    return 0;
}
int main()
{
  	scanf("%d%d", &n, &k);
  	for (int i = 1; i <= n + n; i++)
      	scanf("%d%d%d", &L[i], &R[i], &A[i]), R[i] += n;

  	if (Brute())
      	printf("YES");
  	else
      	printf("NO");
  	return (0);

}

Compilation message (stderr)

tug.cpp: In function 'int main()':
tug.cpp:47:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d%d", &n, &k);
    ~~~~~^~~~~~~~~~~~~~~~
tug.cpp:49:44: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
        scanf("%d%d%d", &L[i], &R[i], &A[i]), R[i] += n;
        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~

• Subtask 1: 18 / 18
• Subtask 2: 0 / 30
• Subtask 3: 0 / 23
• Subtask 4: 0 / 29