Compilare: main.cpp: In function 'long long int dp(long long int, long long int)': main.cpp:29:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i + 1 < d.size(); ++i) ~~~~~~^~~~~~~~~~ main.cpp:36:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < d.size(); ++i) ~~^~~~~~~~~~ main.cpp:50:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = i; j + 1 < d.size(); ++j) ~~~~~~^~~~~~~~~~