Compilare: main.cpp: In function 'int main()': main.cpp:20:11: warning: suggest parentheses around '+' inside '>>' [-Wparentheses] fin>>s+1; ~^~ main.cpp:37:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (k=0;k<L[i].size();k++) ~^~~~~~~~~~~~ main.cpp:58:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<L[poz].size();j++){ ~^~~~~~~~~~~~~~