Compilare: main.cpp: In function 'void read()': main.cpp:20:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(Min>st.size()) ~~~^~~~~~~~~~ main.cpp:14:11: warning: variable 'MinI' set but not used [-Wunused-but-set-variable] int i,MinI=0; ^~~~ main.cpp: In function 'bool solve(int)': main.cpp:38:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<len; j++) ~^~~~ main.cpp:40:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(M[nr]==i) main.cpp:45:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(put[len]<=nr) ~~~~~~~~^~~~ main.cpp:48:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(M[nr]==i)