Compilare: user.cpp: In function ‘void rot()’: user.cpp:19:15: warning: unused variable ‘L’ [-Wunused-variable] int i, j, L, R, aux[NMAX][NMAX]; ^ user.cpp:19:18: warning: unused variable ‘R’ [-Wunused-variable] int i, j, L, R, aux[NMAX][NMAX]; ^ user.cpp: In function ‘void dp()’: user.cpp:39:9: warning: unused variable ‘ant’ [-Wunused-variable] int ant, val, i1, i2, i, j; ^ user.cpp: In function ‘int main()’: user.cpp:102:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("treid.in", "r", stdin); ^ user.cpp:103:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("treid.out", "w", stdout); ^ user.cpp:106:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ user.cpp:109:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &a[i][j]); ^ user.cpp: In function ‘void dp()’: user.cpp:82:59: warning: ‘val’ may be used uninitialized in this function [-Wmaybe-uninitialized] smax = max(smax, over[i1 - 1] + under[i2 + 1] + val); ^ user.cpp:39:30: warning: ‘j’ may be used uninitialized in this function [-Wmaybe-uninitialized] int ant, val, i1, i2, i, j; ^