Compilare: main.cpp: In function 'int main()': main.cpp:46:11: warning: suggest parentheses around '+' inside '>>' [-Wparentheses] fin>>s+1; ~^~ main.cpp:76:37: warning: array subscript has type 'char' [-Wchar-subscripts] while(w>0 && (p[s[i]]<p[op[w]] || (p[s[i]]==p[op[w]] && s[i]!='^'))){ ^ main.cpp:76:46: warning: array subscript has type 'char' [-Wchar-subscripts] while(w>0 && (p[s[i]]<p[op[w]] || (p[s[i]]==p[op[w]] && s[i]!='^'))){ ^ main.cpp:76:58: warning: array subscript has type 'char' [-Wchar-subscripts] while(w>0 && (p[s[i]]<p[op[w]] || (p[s[i]]==p[op[w]] && s[i]!='^'))){ ^ main.cpp:76:68: warning: array subscript has type 'char' [-Wchar-subscripts] while(w>0 && (p[s[i]]<p[op[w]] || (p[s[i]]==p[op[w]] && s[i]!='^'))){ ^ main.cpp: In function 'long long int solve(long long int, long long int, char)': main.cpp:32:1: warning: control reaches end of non-void function [-Wreturn-type] } ^