Compilare: main.cpp: In function 'long long int C(int)': main.cpp:29:11: warning: comparison of integer expressions of different signedness: 'int' and 'unsigned int' [-Wsign-compare] 29 | for(;j<n&&k<l;++j) { | ~^~ main.cpp:34:15: warning: comparison of integer expressions of different signedness: 'int' and 'unsigned int' [-Wsign-compare] 34 | for(w+=j;j<n;) { | ~^~ main.cpp:37:26: warning: comparison of integer expressions of different signedness: 'int' and 'unsigned int' [-Wsign-compare] 37 | for(++c[a[j++]];i<n&&k>l;++i) | ~^~ main.cpp: In function 'int main()': main.cpp:48:18: warning: comparison of integer expressions of different signedness: 'int' and 'unsigned int' [-Wsign-compare] 48 | for(int i=0;i<n;a[i++]=B()); | ~^~ main.cpp:49:18: warning: comparison of integer expressions of different signedness: 'int' and 'unsigned int' [-Wsign-compare] 49 | for(int i=0;i<n;++i) | ~^~