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- // Credit: token
- #include <cstdio>
- int cnt[1000000];
- int n, m;
- int buf;
- int main()
- {
- FILE *key = fopen("output", "r");
- fscanf(key, "%d%d", &n, &m);
- for (int i = 0; i < 2 * m; i++)
- fscanf(key, "%d", &buf),
- cnt[buf]++;
- int now = 1;
- while (now < n)
- {
- int k = cnt[now] / 2;
- printf("%c", '0' + k);
- now += (k + 2) * (k + 1) / 2;
- }
- return 0;
- }
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