Compilare: main.cpp: In function 'int main()': main.cpp:27:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<=deque1[a].size();i++) ~^~~~~~~~~~~~~~~~~~ main.cpp:12:23: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&m,&n); ^ main.cpp:15:32: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d%d",&x,&y,&z); ^