Compilare: user.cpp: In function ‘int main()’: user.cpp:16:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d\n",&N,&M); ^ user.cpp:19:32: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(s, 2*MaxN+5, fin); ^ user.cpp:45:51: warning: ‘cnt’ may be used uninitialized in this function [-Wmaybe-uninitialized] else if(sum == res) cnt = cnt + nr; ^