Compilare: main.cpp: In function 'int main()': main.cpp:18:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 1 ; i <= n ; i++){ ~~^~~~ main.cpp:33:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 1 ; i <= n ; i++) ~~^~~~ main.cpp:36:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 1 ; i < n ; i++){ ~~^~~ main.cpp:42:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = mid ; j < s[i].size() ; j++){ ~~^~~~~~~~~~~~~ main.cpp:55:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 1 ; i < n ; i++){ ~~^~~ main.cpp:63:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = mid ; j < s[n].size() ; j++){ ~~^~~~~~~~~~~~~ main.cpp:69:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 1 ; i < n ; i++) ~~^~~