Compilare: main.cpp: In function 'int main()': main.cpp:12:20: warning: comparison of integer expressions of different signedness: 'int' and 'long long unsigned int' [-Wsign-compare] 12 | for (int i=1; i<=n; i++) | ~^~~ main.cpp:14:20: warning: comparison of integer expressions of different signedness: 'int' and 'long long unsigned int' [-Wsign-compare] 14 | for (int d=1; d<n; d++) | ~^~ main.cpp:16:30: warning: comparison of integer expressions of different signedness: 'int' and 'long long unsigned int' [-Wsign-compare] 16 | for (int left=1; left<n-1; left++) | ~~~~^~~~