Compilare: user.cpp: In function ‘void go(int)’: user.cpp:37:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < m[rad].size(); i++ ) ^ user.cpp:44:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < m[rad].size(); i++ ) ^ user.cpp: In function ‘int readinput()’: user.cpp:19:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "iepuri2.in", "r", stdin ); ^ user.cpp:20:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%d%d", &n, &K ); ^ user.cpp:24:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%d%d", &a, &b ); ^ user.cpp: In function ‘void writeoutput(int)’: user.cpp:61:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("iepuri2.out","w",stdout); ^ user.cpp: In function ‘int readinput()’: user.cpp:31:12: warning: ‘boss’ may be used uninitialized in this function [-Wmaybe-uninitialized] return boss; ^