Compilare: main.cpp: In function 'void update(int, int, int, int, int)': main.cpp:78:7: warning: this 'else' clause does not guard... [-Wmisleading-indentation] else ^~~~ main.cpp:80:13: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'else' aint[nod]=max(aint[2*nod],aint[2*nod+1]); ^~~~ main.cpp: In function 'char read_ch()': main.cpp:14:34: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(_in_buff, 1, 4096, stdin); ^ main.cpp: In function 'int answer(int, int)': main.cpp:107:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ main.cpp: In function 'int main()': main.cpp:114:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("heavypath.in","r",stdin); ^ main.cpp:115:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("heavypath.out","w",stdout); ^ main.cpp:127:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x ,&y); ^