Compilare: main.cpp: In function 'int main()': main.cpp:92:29: warning: unused variable 'x1' [-Wunused-variable] 92 | int x1 = it.first + d[it.second.second][i], x2 = it.first + d[i][it.second.second], x3 = it.first + d[it.second.first][i], x4 = it.first + d[i][it.second.first]; | ^~ main.cpp:92:109: warning: unused variable 'x3' [-Wunused-variable] 92 | int x1 = it.first + d[it.second.second][i], x2 = it.first + d[i][it.second.second], x3 = it.first + d[it.second.first][i], x4 = it.first + d[i][it.second.first]; | ^~