제출 #503018

#제출 시각아이디문제언어결과실행 시간메모리
503018MilosMilutinovic친구 (IOI14_friend)C++14
컴파일 에러
0 ms0 KiB
#include <bits/stdc++.h>
using namespace std;
#define rep(i,a,n) for (int i=a;i<n;i++)
#define per(i,a,n) for (int i=n-1;i>=a;i--)
#define pb push_back
#define mp make_pair
#define all(x) (x).begin(),(x).end()
#define fi first
#define se second
#define SZ(x) ((int)(x).size())
typedef vector<int> VI;
typedef long long ll;
typedef pair<int,int> PII;
typedef double db;
mt19937 mrand(random_device{}()); 
const ll mod=1000000007;
int rnd(int x) { return mrand() % x;}
ll powmod(ll a,ll b) {ll res=1;a%=mod; assert(b>=0); for(;b;b>>=1){if(b&1)res=res*a%mod;a=a*a%mod;}return res;}
ll gcd(ll a,ll b) { return b?gcd(b,a%b):a;}
// head

const int N=101000;
int n,a[N],dp[N][2];
vector<PII> e[N];

void dfs(int u) {
	dp[u][0]=a[u];
	for (auto p:e[u]) {
		int v=p.fi,t=p.se;
		dfs(v);
		if(t==0) {
			dp[u][0]=dp[u][0]+dp[v][1];
			dp[u][1]=max(dp[u][1]+dp[v][1],dp[u][1]+dp[v][0]);
		} else if (t==1) {
			dp[u][0]=max({dp[u][0]+dp[v][1],dp[v][0]+dp[u][1],dp[u][0]+dp[v][0]});
			dp[u][1]=dp[u][1]+dp[v][1];
		} else {
			dp[u][0]=max(dp[u][0]+dp[v][1],dp[v][0]+dp[u][1]);
			dp[u][1]=dp[u][1]+dp[v][1];
		}
	}
}

int findSample(int n,int c[],int p[],int t[]) {
	rep(i,0,n) a[i]=c[i];
	per(i,1,n) e[p[i]].pb(mp(i,t[i]));
	dfs(0);
	return max(dp[0][0],dp[0][1]);
}

int main() {
	scanf("%d",&n);
	int c[n];
	rep(i,0,n) scanf("%d",c+i);
	int p[n];
	rep(i,0,n) scanf("%d",p+i);
	int t[n];
	rep(i,0,n) scanf("%d",t+i);
}

/*

*/

컴파일 시 표준 에러 (stderr) 메시지

friend.cpp: In function 'int main()':
friend.cpp:52:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   52 |  scanf("%d",&n);
      |  ~~~~~^~~~~~~~~
friend.cpp:54:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   54 |  rep(i,0,n) scanf("%d",c+i);
      |             ~~~~~^~~~~~~~~~
friend.cpp:56:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   56 |  rep(i,0,n) scanf("%d",p+i);
      |             ~~~~~^~~~~~~~~~
friend.cpp:58:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   58 |  rep(i,0,n) scanf("%d",t+i);
      |             ~~~~~^~~~~~~~~~
/usr/bin/ld: /tmp/ccZYpxTe.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccJ7Bb5e.o:friend.cpp:(.text.startup+0x140): first defined here
collect2: error: ld returned 1 exit status