Compilare: user.cpp: In function ‘void precomp()’: user.cpp:21:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < v[0][0]; ++ i) ^ user.cpp:24:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (j <= v[1][0] && v[1][j] < v[0][i]) ^ user.cpp:29:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (j <= v[1][0] && v[1][j] == v[0][i] && (v[0][i] - v[0][1]) % d[0] == 0) ^ user.cpp:31:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (j <= v[1][0] && v[1][j] == v[0][i] && (v[1][j] - v[1][1]) % d[1] == 0) ^ user.cpp: In function ‘void init()’: user.cpp:71:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i <= v[t][0]; ++ i) ^ user.cpp: In function ‘int main()’: user.cpp:97:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 2; i <= v[0][0]; ++ i) ^ user.cpp:101:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (j <= v[1][0] && v[1][j] < v[0][i]) ^ user.cpp:108:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (start[0] <= v[0][0] && v[0][start[0]] + 2 * (v[0][i] - v[0][start[0]]) > v[0][v[0][0]]) ^ user.cpp:110:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (start[1] <= v[1][0] && v[1][start[1]] + 2 * (v[1][j] - v[1][start[1]]) > v[1][v[1][0]]) ^ user.cpp:113:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (j <= v[1][0] && v[1][j] == v[0][i]) ^ user.cpp:126:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (fi <= v[0][0]) ^ user.cpp:128:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (fj <= v[1][0]) ^ user.cpp:80:78: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%u%d%d\n%u%d%d\n", &v[0][1], &d[0], &n[0], &v[1][1], &d[1], &n[1]); ^