Compilare: main.cpp: In function 'bool Val(int)': main.cpp:39:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<Hash[val].size();j++) ~^~~~~~~~~~~~~~~~~ main.cpp:61:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<Hash[val].size();j++) ~^~~~~~~~~~~~~~~~~ main.cpp:25:9: warning: unused variable 'ok' [-Wunused-variable] int ok=0; ^~ main.cpp: In function 'int main()': main.cpp:83:18: warning: suggest parentheses around '+' inside '>>' [-Wparentheses] fin>>n>>k>>ch+1; ~~^~ main.cpp: In function 'int el(char)': main.cpp:21:1: warning: control reaches end of non-void function [-Wreturn-type] } ^