Compilare: main.cpp: In function 'int main()': main.cpp:32:27: 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:35:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&mat[i][j]); ^ main.cpp: In function 'void manacher(int*, int*, int)': main.cpp:13:18: warning: 'c' may be used uninitialized in this function [-Wmaybe-uninitialized] rad=min(p[2*c-i],r-i); ~^~