Compilare: main.cpp: In function 'void c1()': main.cpp:15:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 1; i <= n; ++i) ~~^~~~ main.cpp:18:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i == x) ~~^~~~ main.cpp:22:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(e > w) ~~^~~ main.cpp:14:9: warning: unused variable 'sol' [-Wunused-variable] int sol = 0,i,e = w; ^~~