Submission #741664

#	Time	Username	Problem	Language	Result	Execution time	Memory
741664		bane	Friend (IOI14_friend)	C++17	Compilation error	0 ms	0 KiB

friend

#include "friend.h"
#include<bits/stdc++.h>

using namespace std;
template <class A, class B> bool maximize(A &a, B b)  { if (a < b) { a = b; return true; } return false; }
int findSample(int n, int confidence[], int host[], int protocol[]){
	vector <vector <int>> dp(n, vector<int>(2, 0));
	for(int i = 0; i < n; i++)dp[i][1] = confidence[i];
	 for (int i = n, 1; --i >= _a ) {
		if (!protocol[i]) {
			dp[host[i]][0] += max(dp[i][0], dp[i][1]);
			dp[host[i]][1] += dp[i][0];
		} else if (protocol[i] == 1) {
			dp[host[i]][1] += max(dp[i][0], dp[i][1]);
			maximize(dp[host[i]][1], dp[host[i]][0] + dp[i][1]);
			dp[host[i]][0] += dp[i][0];
		} else {
			dp[host[i]][1] += dp[i][0];
			maximize(dp[host[i]][1], dp[host[i]][0] + dp[i][1]);
			dp[host[i]][0] += dp[i][0];
 
		}
	}
	return max(dp[0][0], dp[0][1]);
}

Compilation message (stderr)

friend.cpp: In function 'int findSample(int, int*, int*, int*)':
friend.cpp:9:19: error: expected unqualified-id before numeric constant
    9 |   for (int i = n, 1; --i >= _a ) {
      |                   ^
friend.cpp:9:18: error: expected ';' before numeric constant
    9 |   for (int i = n, 1; --i >= _a ) {
      |                  ^~
      |                  ;
friend.cpp:9:29: error: '_a' was not declared in this scope
    9 |   for (int i = n, 1; --i >= _a ) {
      |                             ^~