Compilare: user.cpp: In function ‘int main()’: user.cpp:30:18: warning: unused variable ‘j’ [-Wunused-variable] int n, m, i, j, s, t, d, k, x, y, xx, yy, ma, ok; ^ user.cpp:30:21: warning: unused variable ‘s’ [-Wunused-variable] int n, m, i, j, s, t, d, k, x, y, xx, yy, ma, ok; ^ user.cpp:30:27: warning: unused variable ‘d’ [-Wunused-variable] int n, m, i, j, s, t, d, k, x, y, xx, yy, ma, ok; ^ user.cpp:30:30: warning: unused variable ‘k’ [-Wunused-variable] int n, m, i, j, s, t, d, k, x, y, xx, yy, ma, ok; ^ user.cpp:30:47: warning: unused variable ‘ma’ [-Wunused-variable] int n, m, i, j, s, t, d, k, x, y, xx, yy, ma, ok; ^ user.cpp:30:51: warning: unused variable ‘ok’ [-Wunused-variable] int n, m, i, j, s, t, d, k, x, y, xx, yy, ma, ok; ^ user.cpp:26:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("reactii.in","r",stdin); ^ user.cpp:27:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("reactii.out","w",stdout); ^ user.cpp:33:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:36:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i].x); ^