Compilare: main.cpp: In function 'int main()': main.cpp:54:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen( "aint.in", "r", stdin ); ^ main.cpp:55:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen( "aint.out", "w", stdout ); ^ main.cpp:59:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf( "%d%d", &n, &m ); ^ main.cpp:63:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf( "%d", &k ); ^ main.cpp:74:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf( "%d%d%d", &k, &a, &b ); ^