UVA Solution 459 - Graph Connectivity - Solution in C,C++

UVA Solution 459 - Graph Connectivity - Solution in C,C++

UVA Online Judge Solution 459 - Graph Connectivity | Volume 4
UVA Problem Link -459 - Graph Connectivity

Problem Name: 459 - Graph Connectivity Solution
Problem Number : UVA - 459 - Graph Connectivity Code
Online Judge : UVA Online Judge Solution
Volume: 4
Solution Language : C plus plus

UVA Solution 459 - Graph Connectivity Code in C/CPP:

#include <stdio.h>
int p[26], r[26];
void init(int n) {
    while(n >= 0) {
        p[n] = n, r[n] = 1;
        n--;
    }
}
int find(int x) {
    return p[x] == x ? x : (p[x]=find(p[x]));
}
int joint(int x, int y) {
    x = find(x), y = find(y);
    if(x != y) {
        if(r[x] > r[y])
            r[x] += r[y], p[y] = x;
        else
            r[y] += r[x], p[x] = y;
        return 1;
    }
    return 0;
}
int main() {
    int t;
    char s[10];
    scanf("%d ", &t);
    while(t--) {
        gets(s);
        init(s[0]-'A');
        int ans = s[0]-'A'+1;
        while(gets(s)) {
            if(s[0] == '\0')
                break;
            ans -= joint(s[0]-'A', s[1]-'A');
        }
        printf("%d\n", ans);
        if(t)
            puts("");
    }
    return 0;
}

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