Compilare: main.cpp: In function 'int main()': main.cpp:54:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < a.size(); j++) { ~~^~~~~~~~~~ main.cpp:61:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < sol.size(); ) { ~~^~~~~~~~~~~~ main.cpp:15:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("shiftright.in", "r", stdin); ^ main.cpp:16:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("shiftright.out", "w", stdout); ^ main.cpp:17:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%s\n", s1); ^ main.cpp:18:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%s", s2); ^