Compilare: main.cpp: In function 'int main()': main.cpp:50:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (l[j] + f[j] - 1 >= G[j].size()) { ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~ main.cpp:83:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (p[k] < G[k].size() && fr[k][last[i] - 1] - fr[k][G[k][p[k]]] >= f1[k]) ~~~~~^~~~~~~~~~~~~ main.cpp:98:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (l[k] < G[k].size() && G[k][l[k]] < G[x][l[x]]) ~~~~~^~~~~~~~~~~~~ main.cpp:100:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (p[k] < G[k].size() && G[k][p[k]] <= G[x][l[x]]) ~~~~~^~~~~~~~~~~~~ main.cpp:22:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("anagrame.in", "r", stdin); ^ main.cpp:23:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("anagrame.out", "w", stdout); ^ main.cpp:26:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d ", &c); ^ main.cpp:27:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%s", s1 + 1); ^ main.cpp:28:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%s", s2 + 1); ^ main.cpp:98:59: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized] while (l[k] < G[k].size() && G[k][l[k]] < G[x][l[x]]) ~~~^