Compilare: user.cpp: In function ‘void BF()’: user.cpp:60:10: warning: unused variable ‘ok’ [-Wunused-variable] bool ok=0; ^ user.cpp: In function ‘int solve()’: user.cpp:149:9: warning: unused variable ‘up1’ [-Wunused-variable] int up1,down1,up2,down2; ^ user.cpp:149:13: warning: unused variable ‘down1’ [-Wunused-variable] int up1,down1,up2,down2; ^ user.cpp:149:19: warning: unused variable ‘up2’ [-Wunused-variable] int up1,down1,up2,down2; ^ user.cpp:149:23: warning: unused variable ‘down2’ [-Wunused-variable] int up1,down1,up2,down2; ^ user.cpp: In function ‘void readdata()’: user.cpp:23:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d\n", &n); ^ user.cpp:25:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &v[i]); ^ user.cpp:31:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] g[k][++deg[k]] = j; ^ user.cpp: In function ‘int solve()’: user.cpp:200:30: warning: ‘maxpos’ may be used uninitialized in this function [-Wmaybe-uninitialized] ret=split(maxpos); ^