Borderou de evaluare (job #567193)

Compilare: user.cpp: In function ‘bool solve(std::string)’: user.cpp:23:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:29:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:38:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:46:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:54:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:61:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:66:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:73:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:88:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:103:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:125:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:127:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:129:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:135:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:136:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:138:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:145:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:148:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]