Compilare: main.cpp: In function 'void f(int, int, int, int)': main.cpp:31:35: warning: suggest parentheses around assignment used as truth value [-Wparentheses] for(int col=c1;col=l2+x;col++) ^ main.cpp: In function 'int main()': main.cpp:39:23: warning: format '%s' expects argument of type 'char*', but argument 3 has type 'char (*)[1000001]' [-Wformat=] fscanf(fin,"%s",&s); ^ main.cpp:39:24: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%s",&s); ^