Compilare: main.cpp: In function 'void solve1()': main.cpp:31:9: warning: unused variable 'sf' [-Wunused-variable] int sf = -1, ci; ^~ main.cpp:31:18: warning: 'ci' may be used uninitialized in this function [-Wmaybe-uninitialized] int sf = -1, ci; ^~ main.cpp:61:10: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized] ans+=x; ^ main.cpp: In function 'void solve2()': main.cpp:123:9: warning: 'ci' may be used uninitialized in this function [-Wmaybe-uninitialized] int ci; ^~ main.cpp:153:10: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized] ans+=x; ^