Submission #586349

#	Time	Username	Problem	Language	Result	Execution time	Memory
586349		LastRonin	Friend (IOI14_friend)	C++14	16 / 100	1 ms	340 KiB

friend

#include "friend.h"
#include <bits/stdc++.h>
#define ll long long
using namespace std;

const ll N = 1e3 + 10;

bool can[N][N];

int findSample(int n,int confidence[],int host[],int protocol[]){
    bool eq = 1;
    for(int j = 1; j < n - 1; j++) {
		if(protocol[j] != protocol[j + 1])
			eq = 0;						
    }
    if(eq) {
    	if(protocol[1] == 1) {
			// empty
			ll sum = 0;
			for(int j = 0; j < n; j++)
				sum += confidence[j];
			return sum;
    	} else if(protocol[1] == 2) {
			// full
			ll mx = 0;
			for(int j = 0; j < n; j++)
				mx = max(mx, (ll)confidence[j]);
			return mx;
    	} else if(protocol[1] == 0) {
    		// tree
    		return -1;
    	}
    } else {
    	for(int j = 1; j < n; j++) {
			if(protocol[j] == 0) {
				can[j][host[j]] = 1;
				can[host[j]][j] = 1;
            } else if(protocol[j] == 1) {
            	for(int i = 0; i < n; i++) {
            		if(can[host[j]][i])
            			can[i][j] = can[j][i] = 1;
            	}
            } else {
            	for(int i = 0; i < n; i++) {
            		if(can[host[j]][i])
            			can[i][j] = can[j][i] = 1;
            	}
            	can[j][host[j]] = 1;
            	can[host[j]][j] = 1;
            }
    	}
    	assert(n <= 10);
    	ll mx = 0;
		for(int j = 0; j < (1<<n); j++) {
			bool incor = 0;			
			ll sum = 0;
			for(int i = 0; i < n; i++) {
				if((1<<i)&j)
					sum = sum + confidence[i]; 					
				for(int k = 0; k < n; k++) {
					if(((1<<i)&j) && ((1<<k)&j) && (can[i][k] || can[k][i])) {
						incor = 1;
					}
				}
			}
			if(!incor)
				mx = max(mx, sum);
		}
		return mx;
    }
	return 0;
}
/*
6
13 3 6 20 10 15
0 0 0 1 1 2 2 1 0 0
6
13 3 6 20 10 15
0 0 0 1 1 2 2 1 0 0

*/
/*
#define __MAXSIZE__ 100002
#include "friend.h"
using namespace std;

// Confidence
int confidence[__MAXSIZE__];

// Host
int host[__MAXSIZE__];

// Protocol
int protocol[__MAXSIZE__];

// Main
int main(void)
{
	int n,i;

	// Number of people
	assert(scanf("%d",&n)==1);
	
	// Confidence
	for(i=0;i<n;i++)
		assert(scanf("%d",&confidence[i])==1);
	
	// Host and Protocol
	for(i=1;i<n;i++)
		assert(scanf("%d %d",&host[i],&protocol[i])==2);
	
	// Answer
	printf("%d\n",findSample(n,confidence,host,protocol));
	return 0;
}
/**/

Compilation message (stderr)

friend.cpp:116:1: warning: "/*" within comment [-Wcomment]
  116 | /**/
      |

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