Compilare: user.cpp: In function ‘int main()’: user.cpp:46:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( j = 0; j < dp[i].size(); ++j ) ^ user.cpp: In function ‘void af(int)’: user.cpp:67:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( j = 0; j < dp[i].size(); ++j ) ^ user.cpp:69:37: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘__gnu_cxx::__alloc_traits<std::allocator<interval> >::value_type {aka interval}’ [-Wformat=] printf( " %d", dp[i][j] ); ^ user.cpp: In function ‘int main()’: user.cpp:18:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "heavymetal.in", "r", stdin ); ^ user.cpp:19:45: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "heavymetal.out", "w", stdout ); ^ user.cpp:22:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%d", &n ); ^ user.cpp:26:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%d%d", &s, &f ); ^