Compilare: main.cpp: In function 'int main()': main.cpp:62:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < comp[yy].size(); j++){ ~~^~~~~~~~~~~~~~~~~ main.cpp:23:24: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d", &t); ^ main.cpp:27:32: 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:38:33: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d %d", &x, &y); ^