Compilare: main.cpp: In function 'int main()': main.cpp:123:11: warning: unused variable 'u' [-Wunused-variable] int q,u,a,b,x1,y1,x2,y2; ^ main.cpp:123:13: warning: unused variable 'a' [-Wunused-variable] int q,u,a,b,x1,y1,x2,y2; ^ main.cpp:123:15: warning: unused variable 'b' [-Wunused-variable] int q,u,a,b,x1,y1,x2,y2; ^ main.cpp:142:9: warning: unused variable 'islandStart' [-Wunused-variable] int islandStart = comp + 1; ^~~~~~~~~~~ main.cpp:121:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pirati.in", "r", stdin); ^ main.cpp:122:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pirati.out", "w", stdout); ^ main.cpp:124:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &n, &m, &q); ^ main.cpp:125:54: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] for(int i = 1; i <= n; ++i) scanf("%s", v[i] + 1); ^ main.cpp:190:49: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d", &x1, &y1, &x2, &y2); ^