Submission #404189

#	Time	Username	Problem	Language	Result	Execution time	Memory
404189		ly20	Friend (IOI14_friend)	C++17	11 / 100	31 ms	3972 KiB

friend

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

const int MAXN = 15;
vector <int> grafo[MAXN];
int val[MAXN];
int tb[MAXN][MAXN];
int findSample(int n,int confidence[],int host[],int protocol[]){
    for(int i = 0; i < n; i++) {
        val[i] = confidence[i];
    }
    for(int i = 1; i < n; i++) {
        int cur = host[i];
        if(protocol[i] == 1 || protocol[i] == 2) {
            for(int j = 0; j < grafo[cur].size(); j++) {
                int viz = grafo[cur][j];
                grafo[viz].push_back(i);
                grafo[i].push_back(viz);
            }
        }
        if(protocol[i] == 0 || protocol[i] == 2) {
            grafo[i].push_back(cur);
            grafo[cur].push_back(i);
        }
    }
    for(int i = 0; i < n; i++) {
        for(int j = 0; j < grafo[i].size(); j++) {
            int viz = grafo[i][j];
            tb[i][viz] = 1; tb[viz][i] = 1;
        }
    }
    int resp = 0;
    for(int i = 0; i < (1 << n); i++) {
        int at = 0;
        vector <int> temp;
        for(int j = 0; j < n; j++) {
            if((1 << j) & i) {
                at += val[j];
                temp.push_back(j);
            }
        }
        bool vl = true;
        for(int j = 0; j < temp.size(); j++) {
            for(int k = j + 1; k < temp.size(); k++) {
                if(tb[temp[j]][temp[k]] == 1) vl = false;
            }
        }
        if(vl && at > resp) resp = at;
    }
    return resp;
}

Compilation message (stderr)

friend.cpp: In function 'int findSample(int, int*, int*, int*)':
friend.cpp:16:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |             for(int j = 0; j < grafo[cur].size(); j++) {
      |                            ~~^~~~~~~~~~~~~~~~~~~
friend.cpp:28:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |         for(int j = 0; j < grafo[i].size(); j++) {
      |                        ~~^~~~~~~~~~~~~~~~~
friend.cpp:44:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   44 |         for(int j = 0; j < temp.size(); j++) {
      |                        ~~^~~~~~~~~~~~~
friend.cpp:45:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |             for(int k = j + 1; k < temp.size(); k++) {
      |                                ~~^~~~~~~~~~~~~

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