diff --git a/0310/1.c b/0310/1.c
new file mode 100644
index 0000000..66fc06f
--- /dev/null
+++ b/0310/1.c
@@ -0,0 +1,11 @@
+#include <stdio.h>
+
+int main() {
+    int n, m, d;
+    scanf("%d %d", &n, &m);
+    d = n - m;
+    if (d < 0)
+        d = -d;
+    printf("%d", d);
+    return 0;
+}
\ No newline at end of file
diff --git a/0310/10.c b/0310/10.c
new file mode 100644
index 0000000..97513c6
--- /dev/null
+++ b/0310/10.c
@@ -0,0 +1,35 @@
+#include <stdio.h>
+#define to_num(x)                                                              \
+    {                                                                          \
+        switch (x) {                                                           \
+        case 'S':                                                              \
+            x = 3;                                                             \
+            break;                                                             \
+        case 'J':                                                              \
+            x = 2;                                                             \
+            break;                                                             \
+        case 'B':                                                              \
+            x = 1;                                                             \
+            break;                                                             \
+        }                                                                      \
+    }
+
+int main() {
+    char a, b;
+    scanf("%c %c", &a, &b);
+    to_num(a);
+    to_num(b);
+    switch (a - b) {
+    case 0:
+        printf("DEUCE");
+        break;
+    case 1:
+    case -2:
+        printf("FIRST");
+        break;
+    default:
+        printf("SECOND");
+        break;
+    }
+    return 0;
+}
\ No newline at end of file
diff --git a/0310/2.c b/0310/2.c
new file mode 100644
index 0000000..d85c8e4
--- /dev/null
+++ b/0310/2.c
@@ -0,0 +1,19 @@
+#include <stdio.h>
+#define swap(i, j)                                                             \
+    {                                                                          \
+        int t = i;                                                             \
+        i = j;                                                                 \
+        j = t;                                                                 \
+    }
+#define max(i, j) (((i) > (j)) ? (i) : (j))
+int main() {
+    int x1, y1, x2, y2;
+    scanf("%d %d %d %d", &x1, &y1, &x2, &y2);
+    if (x1 < y1) {
+        swap(x1, y1);
+    }
+    if (x2 < y2) {
+        swap(x2, y2);
+    }
+    printf("%d %d", max(x1, x2), max(y1, y2));
+}
\ No newline at end of file
diff --git a/0310/3.c b/0310/3.c
new file mode 100644
index 0000000..f97cfc1
--- /dev/null
+++ b/0310/3.c
@@ -0,0 +1,7 @@
+#include <stdio.h>
+int main() {
+    int n;
+    scanf("%d", &n);
+    printf("%s", n % 2 == 0 ? "even" : "odd");
+    return 0;
+}
\ No newline at end of file
diff --git a/0310/4.c b/0310/4.c
new file mode 100644
index 0000000..b4c7783
--- /dev/null
+++ b/0310/4.c
@@ -0,0 +1,8 @@
+#include <stdio.h>
+
+int main() {
+    int a, b;
+    scanf("%d %d", &a, &b);
+    printf("%s", a % b == 0 || b % a == 0 ? "TRUE" : "FALSE");
+    return 0;
+}
\ No newline at end of file
diff --git a/0310/5.c b/0310/5.c
new file mode 100644
index 0000000..4a9a998
--- /dev/null
+++ b/0310/5.c
@@ -0,0 +1,10 @@
+#include <stdio.h>
+#define putbool(x) (printf("%s", (x) ? "TRUE" : "FALSE"))
+#define cube(x) ((x) * (x) * (x))
+
+int main() {
+    int n;
+    scanf("%d", &n);
+    putbool(cube(n % 10) + cube(n / 10 % 10) + cube(n / 100) == n);
+    return 0;
+}
\ No newline at end of file
diff --git a/0310/6.c b/0310/6.c
new file mode 100644
index 0000000..81cf625
--- /dev/null
+++ b/0310/6.c
@@ -0,0 +1,30 @@
+#include <stdio.h>
+
+int main() {
+    int n;
+    scanf("%d", &n);
+    if (n < 0 || n > 100) {
+        printf("Score is error!");
+        return 0;
+    }
+    switch (n / 10) {
+        break;
+    case 6:
+        putchar('D');
+        break;
+    case 7:
+        putchar('C');
+        break;
+    case 8:
+        putchar('B');
+        break;
+    case 9:
+    case 10:
+        putchar('A');
+        break;
+    default:
+        putchar('E');
+        break;
+    }
+    return 0;
+}
\ No newline at end of file
diff --git a/0310/7.c b/0310/7.c
new file mode 100644
index 0000000..727cb26
--- /dev/null
+++ b/0310/7.c
@@ -0,0 +1,9 @@
+#include <stdio.h>
+#define max(a, b) ((a) > (b) ? (a) : (b))
+
+int main() {
+    int a, b, c;
+    scanf("%d %d %d", &a, &b, &c);
+    printf("%d", max(max(a, b), c));
+    return 0;
+}
\ No newline at end of file
diff --git a/0310/8.c b/0310/8.c
new file mode 100644
index 0000000..198f27f
--- /dev/null
+++ b/0310/8.c
@@ -0,0 +1,10 @@
+#include <stdio.h>
+#include <math.h>
+#define putbool(x) (printf("%s", (x) ? "TRUE" : "FALSE"))
+
+int main() {
+    int a, b;
+    scanf("%d %d", &a, &b);
+    putbool(abs(a - b) == 1);
+    return 0;
+}
\ No newline at end of file
diff --git a/0310/9.c b/0310/9.c
new file mode 100644
index 0000000..f7ab82f
--- /dev/null
+++ b/0310/9.c
@@ -0,0 +1,9 @@
+#include <stdio.h>
+#define putbool(x) (printf("%s", (x) ? "TRUE" : "FALSE"))
+
+int main() {
+    int a, b, c;
+    scanf("%d %d %d", &a, &b, &c);
+    putbool(a <= b && b <= c);
+    return 0;
+}
\ No newline at end of file