Submission #1836791

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;

#define FOR(i,a,b) for(int i = (a); i < (b); i++)
#define RFOR(i,b,a) for(int i = (b) - 1; i >= (a); i--)
#define ITER(it, a) for(typeof(a.begin()) it = a.begin(); it != a.end(); it++)
#define FILL(a, value) memset(a, value, sizeof(a))

#define SZ(a) (int) a.size()
#define ALL(a) a.begin(),a.end()
#define PB push_back
#define MP make_pair

typedef long long LL;
typedef vector<int> VI;
typedef pair<int, int> PII;

const double PI = acos(-1.0);
const LL INF = 1000 * 1000 * 1000 + 7;
const LL LINF = INF * (LL)INF;

const int MAX = 3030;

VI g[MAX];

int DP[MAX][MAX];
int A[MAX];

int dfs(int x, int p)
{
	if (DP[x][p] != -1) return DP[x][p];

	int res = 0;
	FOR (i, 0, SZ(g[x]))
	{
		int to = g[x][i];
		if (to == p) continue;

		if (A[to] >= A[x]) continue;
		int val = dfs(to, x);
		if (val == 0) res = 1;
	}

	return DP[x][p] = res;
}


int main()
{
	//freopen("in.txt", "r", stdin);
	//ios::sync_with_stdio(false); cin.tie(0);

	int n;
	scanf("%d", &n);
	FOR (i, 0, n)
	{
		int x;
		scanf("%d", &x);
		A[i] = x;
	}

	FOR (i, 0, n-1)
	{
		int x, y;
		scanf("%d%d", &x, &y);
		x--;
		y--;
		g[x].PB(y);
		g[y].PB(x);
	}

	FILL(DP, -1);

	FOR (i, 0, n)
	{
		if (dfs(i, i))
		{
			printf("%d ", i + 1);
		}
	}
	printf("\n");


}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:54:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n);
                 ^
./Main.cpp:58:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &x);
                  ^
./Main.cpp:65:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", &x, &y);
                        ^

Judge Result