Compilare: main.cpp: In function 'int main()': main.cpp:358:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < v[nd].size(); i++){ ~~^~~~~~~~~~~~~~ main.cpp:386:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < v[nd].size(); i++){ ~~^~~~~~~~~~~~~~ main.cpp:418:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < v[nd].size(); i++){ ~~^~~~~~~~~~~~~~ main.cpp:432:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < w[nd].size(); i++){ ~~^~~~~~~~~~~~~~ main.cpp: In function 'int num2()': main.cpp:266:35: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(s, 1, DIM1, fin); ^ main.cpp:284:35: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(s, 1, DIM1, fin); ^ main.cpp: In function 'int main()': main.cpp:324:27: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(s, 1, DIM1, fin); ^