Compilare: main.cpp: In function 'void buildbst()': main.cpp:24:5: warning: this 'while' clause does not guard... [-Wmisleading-indentation] while(sum + (1 << i) <= n - 1) ^~~~~ main.cpp:25:31: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'while' sum += (1 << i++); i = 1; ^ main.cpp: In function 'int main()': main.cpp:70:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("permsort2.in", "r", stdin); ^ main.cpp:71:42: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("permsort2.out", "w", stdout); ^ main.cpp:72:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ main.cpp:76:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] pos[x] = i; ^