Compilare: main.cpp: In function 'int main()': main.cpp:20:18: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 20 | for(j=0;j<strlen(s);j++) | ~^~~~~~~~~~ main.cpp:30:11: warning: suggest explicit braces to avoid ambiguous 'else' [-Wdangling-else] 30 | if(con!=-1) | ^