编程算法 - 二部图确定 代码(C)

二部图确定 代码(C)

/*
* CppPrimer.cpp
*
*  Created on: 2014.7.27
*      Author: Caroline
*/

/*eclipse cdt*/

#include <stdio.h>

#include <vector>

using namespace std;

class Program {
static const int MAX_V = 100;

/*vector<int> G[MAX_V] = {{1,3}, {0,2}, {1,3}, {0,2}};
int V = 4;*/

vector<int> G[MAX_V] = {{1,2}, {0,2}, {0,1}};
int V = 3;

int color[MAX_V] = {0};

bool dfs(int v, int c) {
color[v] = c;
for (size_t i=0; i<G[v].size(); ++i) {
if (color[G[v][i]] == c) return false;
if (color[G[v][i]] == 0 && !dfs(G[v][i], -c)) return false;
}
return true;
}
public:

void solve() {
for (int i=0; i<V; i++) {
if (color[i] == 0) {
if(!dfs(i,1)) {
printf("result = No\n");
return;
}
}
}
printf("result = Yes\n");
}
};

int main (void)
{
Program iP;
iP.solve();

return 0;

}

result = No