Compilare: user.cpp: In function ‘void dijkstra(int)’: user.cpp:29:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<g[dad].size(); i++) ^ user.cpp: In function ‘void lant(int)’: user.cpp:45:9: warning: unused variable ‘i’ [-Wunused-variable] int i, cost, dad, son, sol[nmax], lg=0; ^ user.cpp:45:12: warning: unused variable ‘cost’ [-Wunused-variable] int i, cost, dad, son, sol[nmax], lg=0; ^ user.cpp:45:18: warning: unused variable ‘dad’ [-Wunused-variable] int i, cost, dad, son, sol[nmax], lg=0; ^ user.cpp:45:23: warning: unused variable ‘son’ [-Wunused-variable] int i, cost, dad, son, sol[nmax], lg=0; ^ user.cpp:45:28: warning: unused variable ‘sol’ [-Wunused-variable] int i, cost, dad, son, sol[nmax], lg=0; ^ user.cpp:45:39: warning: unused variable ‘lg’ [-Wunused-variable] int i, cost, dad, son, sol[nmax], lg=0; ^ user.cpp: In function ‘int main()’: user.cpp:58:24: warning: unused variable ‘j’ [-Wunused-variable] int x, y, cost, i, j, sol, k, l[nmax]; ^ user.cpp:58:27: warning: unused variable ‘sol’ [-Wunused-variable] int x, y, cost, i, j, sol, k, l[nmax]; ^ user.cpp:58:32: warning: unused variable ‘k’ [-Wunused-variable] int x, y, cost, i, j, sol, k, l[nmax]; ^ user.cpp:58:35: warning: unused variable ‘l’ [-Wunused-variable] int x, y, cost, i, j, sol, k, l[nmax]; ^ user.cpp:56:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("trilant.in", "r", stdin); ^ user.cpp:57:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("trilant.out", "w", stdout); ^ user.cpp:59:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &m); ^ user.cpp:60:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &a, &b, &c); ^ user.cpp:63:41: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &x, &y, &cost);