Compilare: user.cpp: In function ‘int main()’: user.cpp:36:45: warning: variable ‘p3’ set but not used [-Wunused-but-set-variable] int min1 = inf, min2 = inf, p1, p2, p3 , min3 = inf; ^ user.cpp:15:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("lacusta.in", "r", stdin); ^ user.cpp:16:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("lacusta.out", "w", stdout); ^ user.cpp:18:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &m); ^ user.cpp:21:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &mat[0][j]); ^ user.cpp:34:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &mat[p][j]); ^ user.cpp:71:43: warning: ‘p2’ may be used uninitialized in this function [-Wmaybe-uninitialized] dp[p][j] = min3 + mat[p][j]; ^ user.cpp:66:41: warning: ‘p1’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(p1 != j && (i != 2 || p1 != 1)) ^