Compilare: user.cpp: In function ‘void solve(int, long long int, char*)’: user.cpp:34:35: warning: unused variable ‘search_index’ [-Wunused-variable] int i, j, next_occurrence, search_index, position, solution_index; ^ user.cpp:34:49: warning: unused variable ‘position’ [-Wunused-variable] int i, j, next_occurrence, search_index, position, solution_index; ^ user.cpp:34:59: warning: unused variable ‘solution_index’ [-Wunused-variable] int i, j, next_occurrence, search_index, position, solution_index; ^ user.cpp:36:13: warning: unused variable ‘c’ [-Wunused-variable] char c; ^ user.cpp:37:13: warning: unused variable ‘result’ [-Wunused-variable] char result[1500]; ^ user.cpp: In function ‘void read()’: user.cpp:97:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &T); ^ user.cpp:99:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%lld", &N, &K); ^ user.cpp:100:30: 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:106:29: 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:107:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(OUTI, "w", stdout); ^