Compilare: main.cpp: In function 'void buildPalTree()': main.cpp:43:7: warning: unused variable 'last' [-Wunused-variable] int last = 0; ^~~~ main.cpp: In function 'void citire()': main.cpp:28:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%s", s + 1); ^ main.cpp: In function 'int main()': main.cpp:74:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pscpld.in", "r", stdin); ^ main.cpp:75:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pscpld.out", "w", stdout); ^