Compilare: main.cpp: In function 'int main()': main.cpp:48:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (ra + pas < poza[i].size() && pa >= poza[i][ra + pas]) ~~~~~~~~~^~~~~~~~~~~~~~~~ main.cpp:52:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (ra + 1 >= poza[i].size() || poza[i][ra + 1] <= pa) ~~~~~~~^~~~~~~~~~~~~~~~~ main.cpp:57:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (rb + pas < pozb[i].size() && pb >= pozb[i][rb + pas]) ~~~~~~~~~^~~~~~~~~~~~~~~~ main.cpp:61:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (rb + 1 >= pozb[i].size() || pozb[i][rb + 1] <= pb) ~~~~~~~^~~~~~~~~~~~~~~~~ main.cpp:63:71: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (dp[poza[i][ra + 1]][pozb[i][rb + 1]] + ans.size() < k) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~ In file included from /usr/include/c++/6/cassert:44:0, from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:33, from main.cpp:1: main.cpp:72:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] assert(ans.size() >= k); ~~~~~~~~~~~^~~~