Compilare: main.cpp: In function 'int main()': main.cpp:95:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<lin.size()-1;i++){ ~^~~~~~~~~~~~~ main.cpp:102:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<col.size()-1;i++){ ~^~~~~~~~~~~~~ main.cpp:78:9: warning: unused variable 't' [-Wunused-variable] int t,i,j; ^ main.cpp:78:13: warning: unused variable 'j' [-Wunused-variable] int t,i,j; ^