50086. Students and Party

#include <stdio.h>
#include <stdlib.h>

int n, e;
int g[32768][256] = {0};
int cnt[32768] = {0};
int invt[32768] = {0};

int main(){
    int n, e;
    scanf("%d %d", &n, &e);
    for(int i = 0; i < e; i++){
        int a, b; scanf("%d %d", &a, &b);
        g[a][cnt[a]++] = b;
        g[b][cnt[b]++] = a;
    }

    int id;
    while(scanf("%d", &id) != EOF){
        invt[id] = 1;
        for(int i = 0; i < cnt[id]; i++){
            invt[g[id][i]] = 1;
        }
    }
    for(int i = 0; i < n; i++){
        if(invt[i] == 0) printf("%d\n", i);
    }
}