Compilare: user.cpp:11:0: warning: "Nmax" redefined [enabled by default] #define Nmax 1010100 ^ user.cpp:5:0: note: this is the location of the previous definition #define Nmax 1000010 ^ user.cpp: In function ‘int main()’: user.cpp:73:9: warning: unused variable ‘k’ [-Wunused-variable] int k=0; ^ user.cpp:64:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("subsecvente.in","r",stdin); ^ user.cpp:65:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("subsecvente.out","w",stdout); ^ user.cpp:66:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",car+1); ^ user.cpp:68:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",car+S2+1); ^