Submission #115912

#	Time	Username	Problem	Language	Result	Execution time	Memory
115912		njchung99	스파이 (JOI13_spy)	C++14	100 / 100	275 ms	36780 KiB

spy

#include<cstdio>
#include<algorithm>
#include<cstring>
using namespace std;
int dp[2010][2010];
int sum[2010][2010];
int p[2010], p1[2010];
int func(int here, int here1) {
	if (here == 0 || here1 == 0)return 0;
	int &ret = dp[here][here1];
	if (ret != -1)return ret;
	ret = sum[here][here1] + func(p[here], here1) + func(here, p1[here1]) - func(p[here], p1[here1]);
	return ret;
}
int main()
{
	memset(dp, -1, sizeof(dp));
	int n, m;
	scanf("%d %d", &n,&m);
	for (int i = 1; i <= n; i++)
		scanf("%d %d", &p[i], &p1[i]);
	for (int i = 0; i < m; i++) {
		int q, w;
		scanf("%d %d", &q, &w);
		sum[q][w]++;
	}
	for (int i = 1; i <= n; i++) {
		printf("%d\n", func(i, i));
	}
}

Compilation message (stderr)

spy.cpp: In function 'int main()':
spy.cpp:19:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d", &n,&m);
  ~~~~~^~~~~~~~~~~~~~~~
spy.cpp:21:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d", &p[i], &p1[i]);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
spy.cpp:24:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d", &q, &w);
   ~~~~~^~~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 70 / 70