Compilare: user.cpp: In function ‘int main()’: user.cpp:21:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < G; ++i) ^ user.cpp:25:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < G; ++i) ^ user.cpp:29:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0; j < G / 8; ++j) ^ user.cpp:33:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (((min == -1) || (min > mincost[e[i]])) && (e[i] >= W)) ^ user.cpp:37:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (curren = 1; curren < W;++curren) ^ user.cpp:40:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < G; ++i) ^ user.cpp:42:46: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if (available[curren][i / 8] & (1 << (7 - i % 8)) == (1 << (7 - i % 8))) ^ user.cpp:46:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0; j < G / 8; ++j) ^ user.cpp:50:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (((min == -1) || (min > mincost[curren + e[i]])) && (curren + e[i] >= W)) ^