Compilare: user.cpp: In function ‘void precomp()’: user.cpp:26:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < v[0][0]; ++ i) ^ user.cpp:29:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (j <= v[1][0] && v[1][j] < v[0][i]) ^ user.cpp:34:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (j <= v[1][0] && v[1][j] == v[0][i] && isP(0, i) && isP(1, j)) ^ user.cpp: In function ‘void init()’: user.cpp:73:36: 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:99:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 2; i <= v[0][0]; ++ i) ^ user.cpp:103:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (j <= v[1][0] && v[1][j] < v[0][i]) ^ user.cpp:110:34: 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]] || !isP(0, start[0]))) ^ user.cpp:112:34: 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]] || !isP(1, start[1]))) ^ user.cpp:115:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (j <= v[1][0] && v[1][j] == v[0][i]) ^ user.cpp:119:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (fi <= v[0][0] && !isP(0, fi)) ^ user.cpp:121:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (fj <= v[1][0] && !isP(1, fj)) ^ user.cpp:132:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (fi <= v[0][0]) ^ user.cpp:134:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (fj <= v[1][0]) ^ user.cpp:82:78: 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]); ^