Compilare: main.cpp: In function 'int main()': main.cpp:23:13: warning: unused variable 'x' [-Wunused-variable] 23 | int x = arr[n - i - 1].first.first, y = arr[n - i - 1].first.second; | ^ main.cpp:23:45: warning: unused variable 'y' [-Wunused-variable] 23 | int x = arr[n - i - 1].first.first, y = arr[n - i - 1].first.second; | ^ main.cpp:32:10: warning: statement has no effect [-Wunused-value] 32 | for (i; i < n - k2; ++i) { | ^ main.cpp:44:10: warning: statement has no effect [-Wunused-value] 44 | for (i; i < n - k2; ++i) { | ^ main.cpp:53:10: warning: left operand of comma operator has no effect [-Wunused-value] 53 | for (i, x; i < n - k2; ++i, ++x) { | ^ main.cpp:53:14: warning: right operand of comma operator has no effect [-Wunused-value] 53 | for (i, x; i < n - k2; ++i, ++x) { | ^