Compilare: user.cpp: In function ‘bool verif_conf()’: user.cpp:68:15: warning: unused variable ‘k’ [-Wunused-variable] int i, j, k, val1, val2; ^ user.cpp:68:18: warning: unused variable ‘val1’ [-Wunused-variable] int i, j, k, val1, val2; ^ user.cpp:68:24: warning: unused variable ‘val2’ [-Wunused-variable] int i, j, k, val1, val2; ^ user.cpp: In function ‘void calc_conf()’: user.cpp:98:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(v1.size()!=n) continue; ^ user.cpp: In function ‘int main()’: user.cpp:107:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("volei.in", "r", stdin); ^ user.cpp:108:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("volei.out", "w", stdout); ^ user.cpp:110:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n", &n, &D); ^ user.cpp:116:53: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %c\n", &a[i].x, &a[i].y, &type); ^