Compilare: main.cpp: In function 'int main()': main.cpp:9:13: warning: unused variable 'm' [-Wunused-variable] int n , m , i , j ,a , b , c; ^ main.cpp:9:21: warning: unused variable 'j' [-Wunused-variable] int n , m , i , j ,a , b , c; ^ main.cpp:9:25: warning: unused variable 'a' [-Wunused-variable] int n , m , i , j ,a , b , c; ^ main.cpp:9:29: warning: unused variable 'b' [-Wunused-variable] int n , m , i , j ,a , b , c; ^ main.cpp:9:33: warning: unused variable 'c' [-Wunused-variable] int n , m , i , j ,a , b , c; ^ main.cpp:7:34: 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); ^ main.cpp:8:36: 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); ^ main.cpp:10:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ main.cpp:14:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i]); ^