Compilare: main.cpp: In function 'void computeBoth(int)': main.cpp:124:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < sons[node].size(); i++) ~~^~~~~~~~~~~~~~~~~~~ main.cpp:131:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i < sons[node].size() - 1) ~~^~~~~~~~~~~~~~~~~~~~~~~ main.cpp:152:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < sons[node].size(); i++) ~~^~~~~~~~~~~~~~~~~~~ main.cpp:170:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i < sons[node].size() - 1) ~~^~~~~~~~~~~~~~~~~~~~~~~ main.cpp:175:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i < sons[node].size() - 1) ~~^~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void read_buffer()': main.cpp:16:50: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buffer, sizeof(char), BUFFER_SIZE, fin); ^