// 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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