Compilare: main.cpp: In function 'void dfs(int, int, long long int)': main.cpp:81:8: warning: unused variable 'ax' [-Wunused-variable] int ax = findPos(h + c); ^~ main.cpp: In function 'int main()': main.cpp:95:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("invtree.in", "r", stdin); ^ main.cpp:96:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("invtree.out", "w", stdout); ^