Compilare: user.cpp: In function ‘int main()’: user.cpp:42:18: warning: unused variable ‘j’ [-Wunused-variable] int n, m, i, j, x, y, c, k; ^ user.cpp:42:24: warning: unused variable ‘y’ [-Wunused-variable] int n, m, i, j, x, y, c, k; ^ user.cpp:42:27: warning: unused variable ‘c’ [-Wunused-variable] int n, m, i, j, x, y, c, k; ^ user.cpp:39:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "scmax.in", "r", stdin ); ^ user.cpp:40:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "scmax.out", "w", stdout ); ^ user.cpp:45:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%d",&n ); ^ user.cpp:48:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%d",&V[ 1 ] ); ^ user.cpp:51:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%d",&V[ i ] ); ^