Submission #236988

#	Time	Username	Problem	Language	Result	Execution time	Memory
236988		crossing0ver	Friend (IOI14_friend)	C++17	0 / 100	58 ms	9464 KiB

friend

#include<bits/stdc++.h>
#include "friend.h"
using namespace std;
const int MAXN = 1E5+5;
int n,val[MAXN];
vector<int> adj[MAXN];
int case1(){
	int   mxval = 0;
	for (int i = 0; i < (1 << n); i++) {
		vector<int> x;
		for (int j = 0; j < n; j++) {
			if ( (1 << j) & i) 
				x.push_back(j);
		}
		bool flag = 1;
		for (int j = 0; j < x.size(); j++) {
			for (int k = 0; k < j; k++) {
				for (int h : adj[x[j]])
					if (h == x[k]) flag = 0;
			}
		}
		if (flag) {
			int s = 0;
			for (int j:x) s += val[j];
			mxval = max(mxval,s);
		}
	}
	return mxval;
}
int findSample(int n1,int confidence[],int host[],int protocol[]){
	n = n1;
	int type[] = {1,1,1};
	for (int i =0; i < n; i++) val[i] = confidence[i];
	for (int i = 1; i < n; i++) {
		int x = protocol[i];
		int v = host[i];
		for (int i =0; i< 3; i++) if (x != i ) type[i] = 0;
		if (x == 0) {
			adj[v].push_back(i);
			adj[i].push_back(v);
		}
		else {
			adj[i] = adj[v];
			if (x == 2) {
				adj[i].push_back(v);
				adj[v].push_back(i);
			}
		}
	}
	if (n <= 10) return case1();

}

Compilation message (stderr)

friend.cpp: In function 'int case1()':
friend.cpp:16:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int j = 0; j < x.size(); j++) {
                   ~~^~~~~~~~~~
friend.cpp: In function 'int findSample(int, int*, int*, int*)':
friend.cpp:32:6: warning: variable 'type' set but not used [-Wunused-but-set-variable]
  int type[] = {1,1,1};
      ^~~~
friend.cpp:52:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^

• Subtask 1: 0 / 11
• Subtask 2: 0 / 8
• Subtask 3: 0 / 8
• Subtask 4: 0 / 19
• Subtask 5: 0 / 23
• Subtask 6: 0 / 31