Compilare: main.cpp: In function 'int solve(int, int)': main.cpp:18:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i>=dp[n-k].size()) ~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:31:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] { freopen("desc2.in", "r",stdin); ^ main.cpp:32:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("desc2.out", "w", stdout); ^ main.cpp:34:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &n, &k, &x); ^