Compilare: main.cpp: In function 'std::vector<long long int> dfs_init(int)': main.cpp:73:7: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] if(val_util[nod][i] <= l) ^ main.cpp: In function 'void read()': main.cpp:26:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &n, &l, &q); ^ main.cpp:30:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &dad); ^ main.cpp:35:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &val[i]); ^ main.cpp:38:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &queries[i]); ^ main.cpp: In function 'int main()': main.cpp:168:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("meow.in", "r", stdin); ^ main.cpp:169:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("meow.out", "w", stdout); ^