Compilare: user.cpp: In function ‘void solve(int, long long int, char*)’: user.cpp:33:35: warning: variable ‘search_index’ set but not used [-Wunused-but-set-variable] int i, j, next_occurrence, search_index, position, solution_index; ^ user.cpp:33:49: warning: unused variable ‘position’ [-Wunused-variable] int i, j, next_occurrence, search_index, position, solution_index; ^ user.cpp:33:59: warning: variable ‘solution_index’ set but not used [-Wunused-but-set-variable] int i, j, next_occurrence, search_index, position, solution_index; ^ user.cpp:35:13: warning: variable ‘c’ set but not used [-Wunused-but-set-variable] char c; ^ user.cpp: In function ‘void read()’: user.cpp:88:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &T); ^ user.cpp:90:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%lld", &N, &K); ^ user.cpp:91:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s", S + 1); //to start indexing from 1 ^ user.cpp: In function ‘int main()’: user.cpp:97:29: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(INI, "r", stdin); ^ user.cpp:98:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(OUTI, "w", stdout); ^