Compilare: main.cpp: In function 'int hamilton(int, int, int)': main.cpp:16:29: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses] if (conf & (1 << i) == 1 ) { ~~~~~~~~~^~~~ main.cpp: In function 'int main()': main.cpp:31:25: warning: unused variable 'j' [-Wunused-variable] int x, y, c, n, m, i, j, sol ; ^ main.cpp:32:33: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d%d", &n, &m ) ; ^ main.cpp:34:40: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d%d%d", &x, &y, &c) ; ^