Compilare: main.cpp: In function 'int main()': main.cpp:19:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses] in>>x+1; ~^~ main.cpp:33:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(s[imax][j]-s[imin-1][j]==imax-imin+1) ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~ main.cpp:14:12: warning: variable 'nri' set but not used [-Wunused-but-set-variable] { int nr=0,nri=0,k=0; ^~~ main.cpp:14:18: warning: unused variable 'k' [-Wunused-variable] { int nr=0,nri=0,k=0; ^