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FileTransfer.cpp
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FileTransfer.cpp
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#include <iostream>
using namespace std;
int *UTNodes;
int size;
void Create(int size){
UTNodes = (int*)malloc(sizeof(int)*(size+1));
for(int i=1;i<=size;i++) UTNodes[i] = -1;
}
void Insert(int a,int b){
while(UTNodes[a]>0){
a = UTNodes[a];
}
while(UTNodes[b]>0){
b = UTNodes[b];
}
if(UTNodes[a] > UTNodes[b])
UTNodes[a] = b ;
else{
if(UTNodes[a] == UTNodes[b]) UTNodes[a]--;
UTNodes[b] = a;
}
}
int Check(int c1,int c2){
while(UTNodes[c1]>0) c1 = UTNodes[c1];
while(UTNodes[c2]>0) c2 = UTNodes[c2];
return c1==c2;
}
int Components(){
int count,i;
count = 0;
for(i=1;i<=size;i++){
if(UTNodes[i] < 0) count ++;
}
return count;
}
int main(){
std::cin >> size;
Create(size);
char action;
int c1,c2;
while(1){
std::cin >> action;
if(action == 'I'){
std::cin >> c1>>c2;
if(c1!=c2) Insert(c1,c2);
}else if(action == 'C'){
std::cin >> c1>>c2;
if(Check(c1,c2)) std::cout << "yes" << '\n';
else std::cout << "no" << '\n';
}else if(action == 'S'){
break;
}
}
if(Components()==1) std::cout << "The network is connected." << '\n';
else std::cout << "There are "<< Components()<<" components." << '\n';
return 0;
}