Compilare: user.cpp: In function ‘int main()’: user.cpp:3:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define for0(i, n) for(int i = 0; i < n; i++) ^ user.cpp:107:5: note: in expansion of macro ‘for0’ for0(i, s.size()) ^ user.cpp:3:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define for0(i, n) for(int i = 0; i < n; i++) ^ user.cpp:118:5: note: in expansion of macro ‘for0’ for0(i, t.size()) ^ user.cpp:3:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define for0(i, n) for(int i = 0; i < n; i++) ^ user.cpp:133:5: note: in expansion of macro ‘for0’ for0(i, s.size() + 1) for0(j, t.size() + 1) SOL = (SOL + sol[i][j]) % MOD; ^ user.cpp:3:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define for0(i, n) for(int i = 0; i < n; i++) ^ user.cpp:133:27: note: in expansion of macro ‘for0’ for0(i, s.size() + 1) for0(j, t.size() + 1) SOL = (SOL + sol[i][j]) % MOD; ^