Compilare: user.cpp: In function ‘int main()’: user.cpp:32:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( j = 0; j < dp[i].size(); ++j ) ^ user.cpp:14:43: 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:15:45: 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:18:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%d", &n ); ^ user.cpp:22:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%d%d", &s, &f ); ^