Eroare de compilare: main.cpp: In function 'int main()': main.cpp:15:71: error: 'max' was not declared in this scope for(int i = 1; i <= n; ++i) scanf("%d", &x), ++fr[x], M = max(M, x); ^ main.cpp:12:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pairs.in", "r", stdin); ^ main.cpp:14:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ Non zero exit status: 1