Compilare: main.cpp: In function 'void dfs(int, int, long long int)': main.cpp:67:47: warning: narrowing conversion of '- d' from 'long long int' to 'int' inside { } [-Wnarrowing] update(root[p] , root[s] , 0 , LIM , {-d , dp[s]}); ^~ main.cpp: In function 'int main()': main.cpp:79:43: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("harbingers.in" , "r" , stdin); ^ main.cpp:80:45: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("harbingers.out" , "w" , stdout); ^