Compilare: main.cpp: In function 'int main()': main.cpp:32:21: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 32 | for(int i = 0;i < strlen(a); ++i) dq.push_back(b[i]),dq2.push_back(a[i]); | ~~^~~~~~~~~~~ main.cpp:34:29: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 34 | for(int i = strlen(a);i < strlen(b); ++i) | ~~^~~~~~~~~~~