Compilare: main.cpp: In function 'int main()': main.cpp:17:26: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 17 | for(int i = 1; i < strlen(s) - 1; i += 2){ | ~~^~~~~~~~~~~~~~~ main.cpp:31:26: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 31 | for(int i = 2; i < strlen(s) - 1; i += 2){ | ~~^~~~~~~~~~~~~~~ main.cpp:52:22: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 52 | for(int i = 2; i < strlen(s); i++){ | ~~^~~~~~~~~~~ main.cpp:50:9: warning: unused variable 'n' [-Wunused-variable] 50 | int n = strlen(s) - 1; | ^