Compilare: main.cpp: In function 'int main()': main.cpp:72:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 1 ; i < v.size(); i++ ) { ~~^~~~~~~~~~ main.cpp:77:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 1 ; i < v.size() ; i++ ) { ~~^~~~~~~~~~ main.cpp:50:33: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d%d", &n, &m ) ; ^ main.cpp:54:35: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d%d", &u, &u2) ; ^